Updated on 2024/05/19

写真a

 
MURAKAMI Takuhiko
 
Organization
Academic Assembly Institute of Science and Technology NOUGAKU KEIRETSU Associate Professor
Graduate School of Science and Technology Environmental Science and Technology Associate Professor
Faculty of Agriculture Department of Agriculture Associate Professor
Title
Associate Professor
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Degree

  • 農学 ( 2000.6   九州大学 )

Research Interests

  • remote sensing

  • 森林計測

  • Forest management

  • Landscape ecology

  • UAV

  • land observing satellite

Research Areas

  • Life Science / Forest science

Research History (researchmap)

  • Niigata University Faculty of Agriculture

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  • Niigata University   Associate Professor

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Research History

  • Niigata University   Faculty of Agriculture Department of Agriculture   Associate Professor

    2017.4

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology   Associate Professor

    2010.4

  • Niigata University   Graduate School of Science and Technology Environmental Science and Technology   Associate Professor

    2010.4

  • Niigata University   Faculty of Agriculture Department of Production and Environment Science   Associate Professor

    2006.11 - 2017.3

Education

  • Kyushu University   Graduate School, Division of Agriculture

    - 2000

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  • Kyushu University   農学研究科   林業学

    - 2000

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    Country: Japan

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  • Kyushu University   Faculty of Agriculture

    - 1995

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  • Kyushu University   School of Agriculture   林学科

    - 1995

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    Country: Japan

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Professional Memberships

 

Papers

  • Spatial Characteristics of Foraging Habitat of Golden Eagle in Deciduous Broadleaf Forest Reviewed

    Takayuki Funo, Tsuneo Sekijima, Shota Mochizuki, Takuhiko Murakami, Aiko Sinbo, Manabu Abe

    Journal of the Japanese Forest Society   101 ( 6 )   289 - 294   2019.12

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    Publishing type:Research paper (scientific journal)   Publisher:The Japanese Forest Society  

    DOI: 10.4005/jjfs.101.289

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  • 屋久島の古地図を用いた過去のヤクスギ分布域の推定 Reviewed

    村上拓彦, 吉田茂二郎, 高嶋敦史

    日本森林学会誌   101   163 - 167   2019

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  • Environmental factors affecting benthic invertebrate assemblages on sandy shores along the Japan Sea coast: implications for coastal biogeography Reviewed

    Takada, Y., Kajihara, N., Sawada, H., Mochizuki, S., Murakami, T.

    Ecological Research   33 ( 1 )   271 - 281   2018.1

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    DOI: 10.1007/s11284-017-1553-1

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  • UAVを利用した森林リモートセンシング Reviewed

    村上 拓彦

    日本リモートセンシング学会誌   38   258 - 265   2018

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  • Damage Control Strategies Affecting Crop-Raiding Japanese Macaque Behaviors in a Farming Community Reviewed

    Ueda, Y, Kiyono, M, Nagano, T, Mochizuki, S, Murakami, T

    Human Ecology   46 ( 2 )   259 - 268   2018

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1007/s10745-018-9994-x

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    Other Link: http://link.springer.com/content/pdf/10.1007/s10745-018-9994-x.pdf

  • Historical logging and current successional status of old-growth Cryptomeria japonica forest on Yakushima Island Reviewed

    Atsushi Takashima, Atsushi Kume, Shigejiro Yoshida, Nobuya Mizoue, Takuhiko Murakami

    JOURNAL OF FOREST RESEARCH   22 ( 2 )   108 - 117   2017

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:TAYLOR & FRANCIS LTD  

    Estimation of the current successional status of long-lived coniferous forests is difficult especially after several hundred years of human disturbance. However, in Cryptomeria japonica forest on Yakushima Island, the stumps generated by logging activities from the seventeenth to nineteenth centuries remain almost intact without intense rotting. From an inventory of these stumps and long-term monitoring of current stands for more than 25 years, we estimated the forest condition before logging and evaluated the current status of secondary succession. The size structure of Cr. japonica stumps suggested the stumps were composed of two different generations: the stumps of trees present before initiation of logging; and those of trees that regenerated after initiation of logging. In the current forest, the stem number of canopy species is decreasing and that of understory broad-leaved species is increasing. Regenerating Cr. japonica individuals are rare. Before the logging, the forest contained a larger number of larger Cr. japonica trees than the current forest. The results of monitoring the current forest suggested that all coniferous species, including Cr. japonica, were still undergoing self-thinning. The current Cr. japonica forest is in an intermediate stage of secondary succession, but the processes of succession are markedly different between the study plots, depending on their location or previous logging intensity.

    DOI: 10.1080/13416979.2016.1273085

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  • Accuracy Comparison of Machine-learning-based Land-cover Classification Using SPOT5/HRG Data Reviewed

    64 ( 1 )   93 - 103   2016

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • Japanese Beech (<i>Fagus crenata</i>) stand mapping using satellite remote sesing data

    Murakami Takuhiko, Mutoh Mikihide, Mochizuki Shota, Kamitani Tomohiko

    The Japanese Forest Society Congress   127   55 - 55   2016

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    Language:Japanese   Publisher:THE JAPANESE FORESTRY SOCIETY  

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    DOI: 10.11519/jfsc.127.0_55

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  • Detecting the nesting suitability of the re-introduced Crested Ibis Nipponia nippon for nature restoration program in Japan Reviewed

    Mochizuki, Shota, Liu, Dongping, Sekijima, Tsuneo, Lu, Jun, Wang, Chao, Ozaki, Kiyoaki, Nagata, Hisashi, Murakami, Takuhiko, Ueno, Yusuke, Yamagishi, Satoshi

    JOURNAL FOR NATURE CONSERVATION   28   45 - 55   2015.11

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    The Crested Ibis, became extinct in the wild in Japan in 1981; however, a captive breeding facility was established on Sado Island, Niigata Prefecture in 1999 in the hope of conserving the species. Following successful breeding at the facility, a group of birds was released on Sado Island on 25th September 2008, with further reintroductions in subsequent years. Habitat restoration is also necessary to facilitate the re-introduction program of this endangered species. The aim of this study was to detect suitable nesting areas for the released ibises on Sado Island for subsequent nature restoration. Since little ibis nesting information was available for Sado Island, the nesting model was constructed from nesting information from China, from which results were extrapolated for Sado Island. Land usage was assessed using LAND-SAT/ETM+ data for China and SPOT/HRG images for Sado Island. In this study, land-use information was used to define the environmental parameters related to nest site selection of the Crested Ibis. For the nesting model, a generalized linear mixed model, with seven environmental factors, was employed. The multi-spatial scale for Crested Ibis nesting was also analyzed. We took the spatial scale into consideration at intervals of 100 m from a buffer size of 100 m to 2500 m. Because nest site selection was influenced by the results of the previous year, nesting location data in 2005 and 2006 were distinguished and models built accordingly. Several important environmental factors were identified for nest site selection: the ratio of broadleaved deciduous forest to coniferous forest; the shape of the forest edge; and, the distance from rice fields and other wetlands. The model's accuracy was verified using the Boyce index, and shows the validity of the model's results. Suitable nesting areas for the Crested Ibis were found mainly on: the Kuninaka plain; the ridgeline between the Kuninaka plain and the Osado or Kosado mountain ranges; the area around Lake Kamo; and, the midwestern area of the Kosado region. Suitable nesting sites for the Crested Ibis were all found to be concentrated in what is known as Yatsuda, a traditional Japanese landscape structure providing a complex mosaic of forest and rice fields with complex ecotones. Eastern Kosado, the region that has been designated by the Ministry of the Environment as the conservation area for the reintroduced birds, was not judged to provide suitable nesting habitat for the Crested Ibis. Unfortunately, no evaluation of habitat suitability was made prior to the release of the first captive-bred Crested Ibis into the wild on Sado Island. Had an evaluation of habitat suitability been performed prior to release, more effective nature restoration could have been planned. (C) 2015 Elsevier GmbH. All rights reserved.

    DOI: 10.1016/j.jnc.2015.08.002

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  • Effects of environmental factors on the density of three species of peracarid crustaceans in micro-tidal sandy shores in Japan Reviewed

    Yoshitake Takada, Naoto Kajihara, Shota Mochizuki, Takuhiko Murakami

    ECOLOGICAL RESEARCH   30 ( 1 )   101 - 109   2015.1

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    The swash zone of sandy shores is a transitional habitat between the sea and land where the physical environment is the primary factor influencing the distribution of shore macrofauna. We constructed cumulative logit models using Bayesian inference to predict the ranked abundance of three species of peracarid crustaceans (Haustorioides japonicus, Excirolana chiltoni, and Archaeomysis kokuboi) that dominate the sandy shores of the Niigata coastline, Sea of Japan. Additionally, we estimated the importance of 14 environmental factors at explaining the variation in abundance. The environmental factors were grouped into three categories: swash zone, landward, and offshore. Optimum models were selected among the null model, the basic model (swash zone factors only), and additional models with landward and/or offshore factors. The optimal model for each of the three species was obtained when landward and/or offshore factors were added to the basic model, suggesting the importance of these regional factors. Combinations of significant factors differed between the three peracarid species. Some differences can be explained by accounting for life history characteristics. The slope of the offshore seafloor was the only common significant factor for the three species. Therefore, a decrease in the size of the shallow area off the sandy shore was associated with a decrease in the density of the three species. Because the peracarid crustaceans play an important role in trophic links in sandy shore ecosystems, our study results predict that an increase of coastal erosion leading to change of near-shore bathymetry will reduce the ecological function of the swash zone.

    DOI: 10.1007/s11284-014-1215-5

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  • Distribution of Donax semigranosus and other bivalves in sandy shore swash zones along the Japan sea coast of Honshu. Reviewed

    Yoshitake Takada, Naoto Kajihara, Shinichiro Abe, Tomoaki Iseki, Yuta Yagi, Hideki Sawada, Hajime Saito, Shota Mochizuki, Takuhiko Murakami

    VENUS   73   51 - 64   2015

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    DOI: 10.18941/venus.73.1-2_51

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  • リモートセンシングによる植生マッピング. Reviewed

    村上拓彦, 望月翔太

    日本生態学会誌   64   233 - 242   2014

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.18960/seitai.64.3_233

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  • Application of remote sensing techniques in wildlife management Reviewed

    Mochizuki Shota, Murakami Takuhiko

    Japanese Journal of Ecology   64 ( 3 )   253 - 264   2014

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Ecological Society of Japan  

    Application of the satellite remote sensing techniques to wildlife research began from discernment of the individual animal and/or evaluation of animal behavior from the photography experiments. Satellite remote sensing to wildlife research at the present has applied for the purpose of evaluating the animal habitat. Trends in satellite remote sensing for wildlife are evaluating the index of wildlife habitat and estimating relationship with an environmental variables and animal distribution. By mapping whether wildlife is suitable for what kind of environment such as potential habitat and habitat suitability, appropriate wildlife management including zoning becomes possible in animal conservation or human-wildlife conflicts. In this paper, we propose the examples in the adaptation of satellite remote sensing techniques to wildlife problems (conservation and management) in recent years. First, the studies about satellite remote sensing of habitat indicator and habitat fragmentation in giant panda conservation were described. Furthermore, the change in potential distribution of Japanese macaques in the long period is introduced as a case study of habitat suitability research. The objective of this study was to determine changes in habitat suitability by combining satellite remote sensing and habitat model. Finally, we propose the possibility of the wildlife research using satellite remote sensing techniques.

    DOI: 10.18960/seitai.64.3_253

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    Other Link: http://agriknowledge.affrc.go.jp/RN/2010890095

  • 空間スケールの違いが野生動物分布の推定に与える影響. Reviewed

    後藤明日香, 望月翔太, 村上拓彦

    景観生態学   19   127 - 138   2014

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    DOI: 10.5738/jale.19.127

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  • 時系列リモートセンシングデータを用いて森林の変化を図化する

    村上 拓彦

    森林科学   72   32 - 35   2014

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    Language:Japanese   Publisher:日本森林学会  

    DOI: 10.11519/jjsk.72.0_32

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  • Vegetation mapping using remotely sensed imagery

    Murakami, T., Mochizuki, S.

    Japanese Journal of Ecology   64 ( 3 )   2014

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  • Scale dependent effects in resource selection by crop-raiding Japanese macaques in Niigata Prefecture, Japan Reviewed

    Shota Mochizuki, Takuhiko Murakami

    Applied Geography   42   13 - 22   2013.8

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    A resource selection function is one that yields values proportional to the probability of use of a resource unit. This quantity is influenced by the heterogeneity of landscape structures, which occurs over multiple spatial scales. To provide input into wildlife management strategies, we investigated the scale dependency and functional responses of Japanese macaques using multiple scale analysis. The multiple buffers with radii of 100, 500, 1000, 1500, 2000, and 2500m were defined as the spatial scale. Crop damage was predicted at the within-home range scale, using the Random Forests algorithm with environmental variables linked to resource selection of Japanese macaques. Sixteen environmental variables were defined, covering aspects of landscape configuration, human disturbance, topography, and adopted countermeasures. Crop damage was most accurately predicted within a buffer zone of 1000m, although radii exceeding 1000m were also highly accurate. Although the importance of variables differed among spatial extents, the functional responses for each environmental variable were independent of spatial extent. These results suggest that the limiting factors of crop damage depend on spatial extent, while functional responses in resource selection remain constant across spatial extents. We also compared a multi-scale gradient map with a typical binary map to demonstrate the uncertainty in damage predictions at different spatial scales. Our results may aid wildlife management planning, for which differences in resource selection across different spatial scales are critically important. © 2013 Elsevier Ltd.

    DOI: 10.1016/j.apgeog.2013.04.016

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  • Forest monitoring in Niigata Prefecture using National Forest Inventory data of Japan

    Chigira Yuji, Murakami Takuhiko

    65 ( 2 )   187 - 193   2013.3

  • Vegetation map using the object-oriented image classification with ensemble learning. Reviewed

    Mochizuki, S, Murakami, T

    Journal of Forest Planning   18 ( 2 )   127 - 134   2013

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Forest Planning  

    Vegetation mapping provides basic information for forest management and planning. In remote sensing research, the process of creating an accurate vegetation map is an important subject. Recently, there has been growing research interest in the object-oriented image classification techniques. The object-oriented image classification consists of multi-dimensional features including object features and thus requires multi-dimensional image classification approaches. For example, a linear model such as the maximum likelihood method of pixelbased classification cannot characterize the patterns or relations of multi-dimensional data. In multi-dimensional image classification, data mining and ensemble learning have been shown to increase accuracy and exibility. This study examined the use of the object-oriented image classification by Random Forest classification for vegetation mapping. Vegetation maps were also created using the Nearest Neighbor method and the Classification and Regression Tree method for comparison of classification accuracy. The study area was Sado Island in Niigata Prefecture, Japan. SPOT/HRG imagery (June 2007) was used and classified into the following seven classes: broadleaved deciduous forest, Japanese cedar, Japanese red pine, bamboo forest, paddy field, urban/road, and bare land. We employed eCognition software for the object-oriented image classification. We selected 18 object features: the mean, standard deviation, ratio, shape, length, and compactness for each band and normalized difference vegetation index value. High accuracy was found for the vegetation maps produced using the Random Forest and Nearest Neighbor methods. The accuracies of these two methods were significantly different from that of the Classification and Regression Tree method, as shown by kappa analysis. Among the three techniques, the Random Forest method showed the highest classification accuracies when class accuracies such as user's accuracy and producer's accuracy were considered. This study demonstrates that the Random Forest classification is effective for vegetation mapping by multi-dimensional image classification.

    DOI: 10.20659/jfp.18.2_127

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  • Seasonal variation on the selection of crop raiding by Japanese macaques Reviewed

    Mochizuki Shota, Murakami Takuhiko, Shibahara Tomo

    Bulletion of the International Association for Landscape Ecology-Japan   18 ( 2 )   161 - 173   2013

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Association for Landscape Ecology  

    Crop damage by wildlife is becoming a serious problem in Japan. We estimated the seasonal change of the habitat use, and the factor caused to crop damage for one troop of the crop-raiding Japanese macaques in Shibata City, Niigata Prefecture. The location data acquired by radio-tracking method from 2006 to 2008 were employed. Moreover, we applied ALOS/AVNIR-2 data for detecting the land-cover within macaques habitat. At first, the seasonal change of habitat use by the Japanese macaques was evaluated using Manlys resource selection index. We also estimated the environmental factors which contributed to the occurrence of crop damage by generalized linear mixed model. As the results, habitat use by crop-raiding Japanese macaques was different by season. Japanese macaques preferred to the agricultural land during August to November. Japanese macaques were used the agricultural land as their foraging sites. Habitat use by Japanese macaques was related to the locations of the foraging sites. Especially, the dependence to the agricultural land becomes high level in the summer and winter which are the food scare seasons. The results of the generalized linear mixed model showed the difference among seasons in the environmental factors contributed to crop damage. The most important environmental factor which relate to crop damage was the minimum distance between the locations of crop damage and forest edge. As the other environmental variables which contributed to the prediction of crop damage, resources which are able to use in each season were selected (i.e., late spring: corn, other crops, and grass land, summer: corn and other crops, early winter: Kaki Persimmon). In conclusion, we propose to use the countermeasures properly in each season following the change of the environmental variables related to the occurrence of crop damage.

    DOI: 10.5738/jale.18.159

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  • New method for extracting plantation boundary using temporal aerial photos Reviewed

    Murakami Takuhiko, Banba Kazunori, Mochizuki Shota

    Japanese Journal of Forest Planning   47 ( 2 )   27 - 36   2013

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Forest Planning  

    We propose a new method of extracting plantation boundary through multi-temporal image analysis using past aerial photos which have been taken by the Forestry Agency and the Geographical Survey Institute, Japan. The seven aerial photo images from 1963 to 2002 were ortho-rectified, the succeeding two-year images were combined, and image classification of this two-year composite data was carried out. Clear cut and planted sites were extracted with the second principal component of the principal component analysis of a two-year composite image of brightness or DSM data This proposed method presented the possibility to delineate the boundary of the planation. Comparing the final map with existing GIS data, the unconformity of boundary information and the inconsistency of stand age were pointed out, consequently the validity of this new method was confirmed.

    DOI: 10.20659/jjfp.47.2_83

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    Other Link: http://agriknowledge.affrc.go.jp/RN/2010873898

  • Evaluation of agricultural landscape mosaic in Niigata Prefecture using Satoyama Index Reviewed

    Murakami Takuhiko, Mochizuki Shota, Nakaya Tomonari

    Bulletion of the International Association for Landscape Ecology-Japan   18 ( 1 )   15 - 22   2013

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Association for Landscape Ecology  

    In this study, we evaluated the pattern of agricultural landscape mosaic in Niigata Prefecture using the Satoyama Index (SI), which is a simple index composed by agricultural landscape heterogeneity and the ratio of nonagricultural land cover. At first, land cover map based on LANDSAT imagery was classified by supervised classification method. Next, we calculated landscape heterogeneity among the 400 grid cells (20 × 20 grid cells: 600m×600m) comprising each agricultural landscape unit from the agricultural landscape heterogeneity index (ALHI). We obtained index values by multiplying the ALHI by the proportion of grid cells classified as nonagricultural landscape elements without urban within the basic landscape spatial unit. SI value was high in the bordering area between slope and flat area such as edge zone of forested area and agricultural lands. In addition, SI value was high also in the portions of along the main river or the coastal forests. There was no inconsistency in the number of landscape elements and SI value within the spatial unit by comparing the spatial pattern of land cover and the SI value. Since SI evaluates the heterogeneity in the agricultural landscape, SI showed zero in the homogenized area such as the broad-leaved deciduous forests. From our results, we pointed out that SI can just quantify the degree of heterogeneity of agricultural landscape, and it is inappropriate to evaluate the biodiversity in a region only with SI value.

    DOI: 10.5738/jale.18.15

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  • The effect of the variation in spatial resolution to tree species classification using aerial photograph

    Mochizuki Shota, Watanabe Yuka, Murakami Takuhiko, Kotoda Ayaka, Kamitani Tomohiko

    The Japanese Forest Society Congress   124   427 - 427   2013

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    Language:Japanese   Publisher:THE JAPANESE FORESTRY SOCIETY  

    DOI: 10.11519/jfsc.124.0.427.0

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  • Monitoring the actual condition of coarstal pine forest using digital aerial photo imagery

    Murakami Takuhiko, Seiji Toru, Mochizuki Shota

    The Japanese Forest Society Congress   124   288 - 288   2013

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    Language:Japanese   Publisher:THE JAPANESE FORESTRY SOCIETY  

    DOI: 10.11519/jfsc.124.0.288.0

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  • Vegetation Map using Object-oriented Image Classification with Ensemble Learning(B:Remote sensing and GIS,POSTER PRESENTATION,Followup and New Challenge for Coming Generations,The Second International Conference on FORCOM,Abstract Proceedings of FORCOM2011)

    MOCHIZUKI Shota, MURAKAMI Takuhiko

    Journal of Forest Planning   17 ( 2 )   67 - 67   2012

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    DOI: 10.20659/jfp.17.2_67_2

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  • Change in habitat selection by Japanese macaques (Macaca fuscata) and habitat fragmentation analysis using temporal remotely sensed data in Niigata Prefecture, Japan Reviewed

    Shota Mochizuki, Takuhiko Murakami

    INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION   13 ( 4 )   562 - 571   2011.8

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    The aim of this study was to evaluate changes in macaque habitat selection during a 29-year period. We focused on the 1970s, when little crop damage was caused by Japanese macaques (Macaca fuscata), and the 2000s, when the damage became remarkable. Landsat/MSS from 1978 and ALOS/AVNIR-2 from 2007 were employed for land-cover mapping. For the 2007 land-cover classification, we applied an object-oriented image classification and a classification and regression tree. The Kappa coefficient of the 2007 land-cover map was 0.89. For the 1978 land-cover classification, change detection using principal component analysis and object-oriented image classification were applied to reduce resolution difference errors. The Kappa coefficient of the 1978 land-cover map was 0.84. We applied a Random Forest model for machine learning and data mining to predict the habitat selection of macaques. Several important environmental factors were identified for macaque habitat selection: the ratio of coniferous forest to farmland, distance to farmland, and maximum snow depth. The Random Forest model was extrapolated to the 1978 land-cover map. Over the 29-year period, coniferous forest changed to broad-leaved forest and/or mixed forest within the macaque habitat area. Coniferous forests were not selected as food resources by Japanese macaques. Furthermore, large-scale patches of farmland were used as food resources over the 29-year period. These changes indicated that habitat selection by Japanese macaques changed over the study period. The results show that the home range of macaques expanded, and macaques may now be distributed over a wider area as a result of changes in landscape configuration. Thus, forest planning, such as sustainable management of artificial conifer forests, is important for reducing crop damage. (C) 2011 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.jag.2011.02.006

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  • Analysis of the Planting Density toward Low-cost Forestry::a Result from the Experimental Plots of Obi-sugi Planting Density Reviewed

    Fukuchi Shinsuke, Yoshida Shigejiro, Mizoue Nobuya, Murakami Takuhiko, Kajisa Tsuyoshi, Ota Tetsuji, Nagashima Keiko

    JOURNAL OF THE JAPANESE FORESTRY SOCIETY   93 ( 6 )   303 - 308   2011

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:THE JAPANESE FORESTRY SOCIETY  

    We investigated the planting density of Sugi (<I>Cryptomeia japonica</I>) at two experimental density plots of Obi-sugi trees in the south forest district of the national forest, Miyazaki Prefecture. There were established in 1974. Both have the same systematic experimental design formulated by Nelder (1962) with 10 density blocks in the range of 376∼10,000 stems/ha and 36 repetitions. The weakness was identified in the extreme high and low density classes on the basis of the tree size, growth rate and wood quality. The high density class included the higher volume density per ha, which became constant with a volume density greater than 1,615 stems/ha. This class included trees with lower wood quality, while the low density class included those with the lower volume density per ha. From the above analysis, we concluded that the moderate planting density, which is approximately 2,000-2,800 stems per ha, is the appropriate density for low-cost forestry.

    DOI: 10.4005/jjfs.93.303

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  • Situation of Erosion, Landslide, and Limiting Factors of Vegitation Recovery on Abandoned Clear-cut Sites in Kyushu Region Reviewed

    Kajisa Tsuyoshi, Miyazaki Junji, Fukuzato Kazuro, Oda Miho, Shimozono Hisaaki, Yoshida Shigejiro, Nagashima Keiko, Murakami Takuhiko, Mizoue Nobuya, Sasaki Shigeyuki, Kuwano Yasumitsu, Saho Kimitaka, Shimizu Masatoshi

    Journal of the Japanese Forest Society   93 ( 6 )   288 - 293   2011

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:THE JAPANESE FORESTRY SOCIETY  

    Since 1990&rsquo;s, In Kyushu region, the abandonment of sites after clear-cutting plantations is increasing rapidly in Japan. Abandoned clear-cut sites may result in reduced soil and water conservation. In this study, we investigated erosions, landslides and factors limiting vegetation recovery (e.g. Damage caused by browsing by sika deer and invasion by bamboo and luxuriant vine species) in 199 abandoned clear-cut sites in the Kyushu region. Among 199 sites, 8 sites (4.2%) showed severe erosions and landslides. However, 125 sites (62.8%) showed some factors limiting vegetation recovery. Thus, the abandoned clear-cut sites are problematic, and browsing by sika deer and invasion by bamboo or vine may add limiting vegetation recovery to this problem, although a few of severe erosions and landslides currently.

    DOI: 10.4005/jjfs.93.288

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  • The Occurrence and Spatial Distribution of Non-reforested Areas on the Main Island of Kyushu, Japan Reviewed

    Murakami Takuhiko, Fukuzato Kazuro, Oda Miho, Shimozono Hisaaki, Yoshida Shigejiro, Ota Tetsuji, Mizoue Nobuya, Sasaki Shigeyuki, Kuwano Yasumitsu, Saho Kimitaka, Shimizu Masatoshi, Miyazaki Junji

    Journal of the Japanese Forest Society   93 ( 6 )   280 - 287   2011

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    To quantify non-reforested area (NRA) in the Kyushu region, we analyzed the occurrence rate of NRAs in each prefecture and their spatial distribution. To determine reforestation after coniferous plantation forest clear cutting, we analyzed images to determine changes in area using multi-temporal remotely sensed imagery. We studied two periods, from 1998 to 2002 (first period) and after 2002 (second period), to determine changes in NRA between the two periods. Point-based analysis showed that the NRA occurrence rate for the entire Kyushu main island in the first and second periods was 30.9 and 24.3%, respectively. Mapping the NRA spatial distribution using GIS showed that NRAs were concentrated in specific areas in both the first and second periods, rather than being distributed uniformly in the forested regions of Kyushu. The cut area of coniferous plantation forests and NRA were totaled using the Japanese secondary mesh unit, with the NRA occurrence rate calculated via mesh unit. In comparing the first and second periods, we found that most of the meshes showing extremely high NRAs (occurrence rate >50%) were not located in the same place in the two periods. Thus, the occurrence of NRAs shifted between the two periods, with NRAs distributed more widely in the second period.

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  • The influence of forest boundary shape and environmental variables on farmland invasion by wild Japanese macaques. Reviewed

    Mochizuki, S, Murakami, T

    Journal of Forest Planning   16   223 - 231   2011

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  • Change in habitat selection by Japanese macaques (Macaca fuscata) and habitat fragmentation analysis using temporal remotely sensed data in Niigata Prefecture, Japan Reviewed

    Shota Mochizuki, Takuhiko Murakami

    International Journal of Applied Earth Observation and Geoinformation   13 ( 4 )   562 - 571   2011

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    The aim of this study was to evaluate changes in macaque habitat selection during a 29-year period. We focused on the 1970s, when little crop damage was caused by Japanese macaques (Macaca fuscata), and the 2000s, when the damage became remarkable. Landsat/MSS from 1978 and ALOS/AVNIR-2 from 2007 were employed for land-cover mapping. For the 2007 land-cover classification, we applied an object-oriented image classification and a classification and regression tree. The Kappa coefficient of the 2007 land-cover map was 0.89. For the 1978 land-cover classification, change detection using principal component analysis and object-oriented image classification were applied to reduce resolution difference errors. The Kappa coefficient of the 1978 land-cover map was 0.84. We applied a Random Forest model for machine learning and data mining to predict the habitat selection of macaques. Several important environmental factors were identified for macaque habitat selection: the ratio of coniferous forest to farmland, distance to farmland, and maximum snow depth. The Random Forest model was extrapolated to the 1978 land-cover map. Over the 29-year period, coniferous forest changed to broad-leaved forest and/or mixed forest within the macaque habitat area. Coniferous forests were not selected as food resources by Japanese macaques. Furthermore, large-scale patches of farmland were used as food resources over the 29-year period. These changes indicated that habitat selection by Japanese macaques changed over the study period. The results show that the home range of macaques expanded, and macaques may now be distributed over a wider area as a result of changes in landscape configuration. Thus, forest planning, such as sustainable management of artificial conifer forests, is important for reducing crop damage. © 2011 Elsevier B.V.

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  • The guide for FRAGSTATS

    Mochizuki Shota, Murakami Takuhiko

    Bulletion of the International Association for Landscape Ecology-Japan   16 ( 1 )   53 - 58   2011

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    DOI: 10.5738/jale.16.53

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  • Change in the accuracy of image classification with multi-dimensional feature space

    Mochizuki Shota, Murakami Takuhiko

    The Japanese Forest Society Congress   123   B16 - B16   2011

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  • Comparison of the image classification methods for nut species mapping using high-resolution satelite imagery

    kanaya shota, mochizuki shota, murakami takuhiko

    The Japanese Forest Society Congress   123   Pb095 - Pb095   2011

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  • Landscape structure in Sado Island at the beginning of the 1900s using old edition topographic map

    hasegawa yasuhiro, murakami takuhiko

    The Japanese Forest Society Congress   123   Pb098 - Pb098   2011

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  • Examination of the optimum segmentation in the object-based image analysis for forest stand type classification

    MURAKAMI Takuhiko, ONISHI Noriko, KAJISA Tsuyoshi, MIZOUE Nobuya, YOSHIDA Shigejiro

    Journal of the Japan society of photogrammetry   49 ( 3 )   159 - 165   2010.7

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    For object-based forest stand type classification using high resolution satellite data, the relation of the parameter of segmentation and classification accuracy was investigated. A target area is forested landscape in the Kirishima area over both Ebino city of Miyazaki and Kirishima city of Kagoshima, the southern part of Kyushu Island. A pan-sharpen IKONOS data (1-m of spatial resolution) was employed in this analysis. In addition to varying the scale parameter from 100 to 1000, some combinations of color and shape criterion were examined. As a result of measuring the accuracy of forest stand type classification, when scale parameter was 300, the highest classification accuracy was achieved. It was indicated that the color criterion also affects classification accuracy in this study. Consequently, it would be greatly concerned with classification accuracy whether target patches are delineated adequately by segmentation, and this paper indicated that quantitatively.

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  • Detection of clear-cut areas using the image differencing method with LANDSAT/TM data. Reviewed

    Murakami, T, Ohta, T, Kajisa, T, Mizoue, N, Yoshida, S

    Asian Journal of GEOINFORMATICS   10   11 - 19   2010

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  • Positional accuracy of National Forest Inventory plots in Japan. Reviewed

    Kitahara, F, Mizoue, N, Kajisa, T, Murakami, T, Yoshida, S

    Journal of Forest Planning   15 ( 2 )   73 - 79   2010

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    In most countries, the positional accuracy of National Forest Inventory (NFI) plots is unknown, even though the NFI is expected to provide geo-referenced ground data for remote sensing. The present study evaluated the positional error of Japanese NFI plots that had already been located using a Global Positioning System (GPS) for navigational assistance toward target coordinates on a 4-km grid. The actual positions of 82 plots in 4 prefectures were measured using a high-precision GPS with dual-frequency carrier-phase observation in comparison with the target coordinates. The positional error was found to be significantly related to GPS types that had been used for navigation during the establishment of the plot, but not with terrain, canopy types and stand density. The mean error when using differential GPS (DGPS) navigation was 6.2m; significantly lower than the 20.0m obtained using autonomous GPS. We conclude that the positional accuracy of the NFI plots in Japan is acceptable for use as a ground reference for the widely used Landsat satellite images with 30-m resolution if the plots had been located using DGPS navigation. In addition, the position of plots located without the use of DGPS should be re-measured to enhance the availability of NFI data.

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  • Detection of clear-cut areas using the image differencing method with LANDSAT/TM data

    Takuhiko Murakami, Tetsuji Ohta, Tsuyoshi Kajisa, Nobuya Mizoue, Shigejiro Yoshida

    31st Asian Conference on Remote Sensing 2010, ACRS 2010   2   1530 - 1535   2010

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    Detecting the occurrence of clear-cutting is a practical use for remotely sensed data, and the image differencing method is one technique that can be used. This method is simple and powerful, but a systematic evaluation of its accuracy and a statistical determination of threshold values have not been established. We examined the accuracy of image differencing methods using a single band or band combinations, or scene combinations, to detect clear-cuts with LANDSAT/ TM data. Furthermore, we examined the relationship between clear-cut size and detection accuracy with a focus on the most effective bands. Results showed that bands 3 and 7 are optimal because they detect clear-cut areas with less error. Accuracy varied with the clear-cut size, and clear-cut regions less than 1 ha in area exhibited more error.

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  • Object-based forest biomass estimation using Landsat ETM plus in Kampong Thom Province, Cambodia Reviewed

    Tsuyoshi Kajisa, Takuhiko Murakami, Nobuya Mizoue, Neth Top, Shigejiro Yoshida

    JOURNAL OF FOREST RESEARCH   14 ( 4 )   203 - 211   2009.8

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    Information about forest biomass distribution is important for sustainable forest management and monitoring fuelwood supply. The objective of this study is to develop an accurate forest biomass map for Kampong Thom Province, Cambodia. We used a new technique (object-based approach) and a conventional technique (pixel-based approach) for the estimation of forest biomass using Landsat Enhanced Thematic Mapper Plus (ETM+). The object-based approach created segments of images, and calculated statistical and textural attributes. Our results showed that estimation accuracy of the object-based approach, with the use of band 1 and an exponential fit, was the best (R (2) = 0.76), and this accuracy was comparable to that of the pixel-based approach (R (2) = 0.67). Although several textural variables were related to forest biomass, they did not contribute significantly to improvement of estimation accuracy. However, the object-based method can be used for image segmentation so that the image objects are spectrally more homogeneous within individual regions than with their neighbors. Hence, they can be regarded as management units for policy-related spatial decisions. Therefore, it is possible to select either of the two methods depending upon what the situation demands.

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  • The effect of corridor to crop damage by Japanese macaques

    Mochizuki Shota, Murakami Takuhiko, Shibahara Tomo

    Bulletion of the International Association for Landscape Ecology-Japan   14 ( 2 )   109 - 118   2009

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    Crop damage by wildlife is becoming an increasingly problem in Japan. A troop of Japanese macaque, Otsuki troop, has been tracked using radio-telemetry near the city of Shibata, Niigata Prefecture. Home range and the core area were determined by the fixed kernel method. Core area of the troop was located around the peninsular-shaped forest sticking out in the crop fields. Landcover was classified using ALOS/AVNIR-2 images. Logistic regression analysis was used to examine the environmental factors contributing the presence /absence of crop damage by the troop. In the model of home range, 3 factors were extracted; distance between crop field and forest edge, distance between crop field and settlement, distance between crop field and road. In the model of core area, distance between crop field and forest edge was chosen as a contributing factor. These results indicated crop fields near forests were vulnerable to the damage by macaques. Peninsular-shaped forests were frequently used as corridors connecting crop fields and forest habitat, and facilitate the expansion of damage by macaques.

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  • Discontinuous DBH-height relationship of Cryptomeria japonica on Yakushima Island: Effect of frequent typhoons on the maximum height Reviewed

    Takashima, A., Kume, A., Yoshida, S., Murakami, T., Kajisa, T., Mizoue, N.

    Ecological Research   24 ( 5 )   1003 - 1011   2009

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    DOI: 10.1007/s11284-008-0574-1

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  • Landscape level and stand level factors affecting the intensity of trunk damage by Sika deer (Cervus nippon)

    INOUE Tomoki, MITSUDA Yasushi, MURAKAMI Takuhiko, MIYAJIMA Junji, MIZOUE Nobuya, YOSHIDA Shigejiro

    Japanese Journal of Forest Planning   42 ( 1 )   69 - 79   2009

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    To reveal factors affecting the intensity of trunk damage caused by sika deer (bark-stripping and fraying), we developed regression models to explain the bark-stripping intensity in Japanese cypress (Chamaecyparis obtusa) plantation forests in the Kuma district of Kumamoto Prefecture. We applied the zero-inflated negative binomial model to point-surveyed trunk damage data collected by Kumamoto Prefecture using landscape level and stand level factors as explanatory variables. The best fitted model had three explanatory variables, which were the ratio of plantation forest area around the surveyed sites and distance to the nearest road (landscape level factor), and the amount of understorey vegetation (stand level factor). This result suggested that not only landscape level factors but also stand level factors should be considered when formulating plans to prevent trunk damage damage by Sika deer in plantation forests.

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  • Estimation of stand volumes using the k-nearest neighbors method in Kyushu, Japan Reviewed

    Kajisa, T, Murakami, T, Mizoue, N, Kitahara, F, Yoshida, S

    Journal of Forest Research   13 ( 4 )   249 - 254   2008.8

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    The k-nearest neighbors (kNN) method is widely employed in national forest inventory applications using remote sensing data. The objective of this study was to evaluate the kNN method for stand volume estimation by combining LANDSAT/ETM+ data with 622 field sample plots from the Japanese National Forest Inventory (NFI) in Kyushu, Japan. The root mean square error (RMSE) and relative RMSE of the volume estimates rapidly decreased as the number of nearest neighbors (k) increased up to five, and then it slightly declined. They were consistently smaller for the Euclidean distance than for the Mahalanobis distance. The estimation errors (RMSE and relative RMSE) were 169.2 m 3 /ha and 66.2%, respectively (k = 10). The relative RMSE was similar to the previous studies. The estimated values were more accurate towards the mean value of the total volume, with an overestimation of the low volumes and an underestimation of the high volumes. We found a significant linear relationship between the observed stand volumes and estimated errors, which suggests that systematic errors may be reduced using this linearity. This research concluded that the kNN method is suitable for estimating stand volumes in Kyushu. © 2008 The Japanese Forest Society and Springer.

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  • The relationship between the density of Cryptomeria japonica stands and texture statistics derived from very high resolution imagery : The research using simulated very-high-resolution imagery

    OTA Tetsuji, MURAKAMI Takuhiko, KAJISA Tsuyoshi, MIZOUE Nobuya, YOSHIDA Shigejiro

    Journal of the Japan Society of Photogrammetry and Remote Sensing   46 ( 6 )   4 - 15   2008.1

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    To detect non-thinned stands using very-high-resolution imagery, we assessed the relationship between the texture statistics derived from the gray level co-occurrence matrix (GLCM) and the density of <I>Cryptomeria japonica</I> stands. Because it was difficult to make the condition, like stand age and slope, consistent using real images and stands, simulated images were used. The results showed that each texture statistic had a unique pattern of variation, owing to stand density. Moreover, the amount of thinning affected the texture statistics. Because the values of the texture statistics varied according to the amount of it even if the stand density was the same, it was indicated that it was difficult to predict stand density using the texture derived from GLCM. Nevertheless, it should be possible to extract stands that have not been thinned using the texture statistics from very-high-resolution imagery, especially the homogeneity and the angular second moment.

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  • Stem Volume Equation and Tree Growth For Rubber Trees in Cambodia

    Khun Kakada, Mizoue Nobuya, Yoshida Shigejiro, Murakami Takuhiko

    Journal of Forest Planning   13 ( 2 )   335 - 341   2008

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    Rubber trees (Hevea brasiliensis) in Cambodia are important sources for not only natural rubber but also wood products. This study was conducted to set up stem volume equations to estimate the stand volume and the volume increment for rubber trees in Cambodia. Krek Rubber Plantation located in Kompong Cham Province was selected for study area. Sixty trees of the clone PR107 at the age of 36, 44, 45 and 46 were felled and cut into segments of one meter long to formulate the volume equation. The DBH and total height of 450 standing trees (15 plots) at different ages (6-10 and 36-48) were measured to estimate volume per hectare and the mean annual increment (MAI). This study revealed that the volume equation for standing rubber trees clone PR107 is V=0.00018381 D^<2.23961> H^<0.15334> or V=0.00024884 D^<2.29535> where V is the over bark volume (m^3), D is diameter at breast height (cm), H is total height (m). Using the two-variable equation, rubber wood volume at the rotation length of 25-30 years was estimated at about 240 - 270m^3 ha^<-1> with the MAI of 9.33 m^3 ha^<-1> yr^<-1>.

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  • Differences in spectral trajectory with stand volume development between Japanese larch and Japanese oak in Hokkaido, Japan Reviewed

    Tsuyoshi Kajisa, Takuhiko Murakami, Nobuya Mizoue, Shigejiro Yoshida

    JOURNAL OF FOREST RESEARCH   12 ( 6 )   435 - 441   2007.12

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    Our objective was to investigate the differences in the spectral trajectory of the LANDSAT Thematic Mapper with stand volume development between Japanese larch (Larix kaempferi) and Japanese oak (Quercus mongolica var. crispula) in the experimental forest of Kyushu University, Hokkaido, Japan. We used nonlinear regression and a categorical variable to investigate the relationship between spectral reflectance factor and stand volume for each forest type. This research showed that the reflectance factor of Japanese larch and Japanese oak reached saturation and that both forest types had different spectral trajectories with stand development. In addition, we found that middle of development stage (stand volume was between 100 and 200 m(3)/ha) of each forest type had similarity in reflectance factor.

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  • Prediction of existence probability of Abies Firma seedlings in cypress (Chamaecyparis obtusa) plantations in Kirishima

    M. Kondo, Y. Mitsuda, S. Yoshida, N. Mizoue, T. Murakami

    Nihon Ringakkai Shi/Journal of the Japanese Forestry Society   89 ( 6 )   407 - 411   2007

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    To select suitable sites for restoring plantations to natural Abies firma and Tsuga sieboldii forests in the Kirishima mountain region, the likelihood of the existence of Abies seedlings was predicted using logistic regression analysis. Using information on natural forest patches and individual mature trees as seed sources, the results of the model selection procedure showed that the existence of seedlings was best predicted when the distance from a mature tree and the basal area of the mature tree in a natural forest were considered. In other words, Abies seedlings tend to exist near large mature trees in a plantation. Moreover, to select a suitable site for restoration, information on individual mature trees is indispensable for predicting the likelihood of seedling existence with high accuracy.

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  • The relationship between bark-stripping damage to forest trees caused by sika deer (Cervus nippon) and understory vegetation

    T. Inoue, T. Murakami, Y. Mitsuda, J. Miyajima, N. Mizoue, S. Yoshida

    Nihon Ringakkai Shi/Journal of the Japanese Forestry Society   89 ( 3 )   208 - 216   2007

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    The relationship between the number of bark-stripped trees and understory vegetation was examined in cypress (Chamaecyparis obtusa) plantations in the Kuma region of Kumamoto Prefecture, Japan. First, the amount of understory vegetation was quantified by taking images using a digital camera. Using TWINSPAN, the 77 surveyed sites were classified into three vegetation types based on the species composition of the understory vegetation: Sasamorpha borealis, pioneer species, and evergreen-tree species. Then, we used the bootstrap method and examined whether there were fewer bark- stripped trees at the surveyed sites with much understory vegetation. The quantity of understory vegetation influenced the number of bark-stripped trees only in the evergreen-tree species category, which suggests that physical and visual shielding by understory vegetation is very useful for preventing bark-stripping.

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  • Relationship between stand volume and satellite spectral data in Cambodia

    Kajisa Tsuyoshi, Mizoue Nobuya, Murakami Takuhiko, Top Neth, Kakada Khun, Yoshida Shigejiro

    The Japanese Forest Society Congress   118   224 - 224   2007

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  • Vegetation recovery and it's factor on abandoned forest after felling.

    Iguchi Tomomichi, Yoshida Shigejirou, Hosaka Takenori, Mizoue Noriya, Nagashima Keiko, Murakami Takuhiko

    The Japanese Forest Society Congress   118   713 - 713   2007

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  • Studies on the abandoned forest in Kyushu area:Interim result of the research

    YOSHIDA SHIGEJIRO, MIZOUE NOBUYA, MURAKAMI TAKUHIKO, NAGASHIMA KEIKO, HOSAKA TAKENORI

    The Japanese Forest Society Congress   118   159 - 159   2007

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  • The role of remote sensing data on non-reforestation project

    Murakami Takuhiko, Ohta Tetsuji, Kajisa Tsuyoshi, Mizoue Nobuya, Yoshida Shigejiro

    The Japanese Forest Society Congress   118   136 - 136   2007

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  • Seasonal-profile of NDVI in University Forests derived from high-temporal resolution data

    Shigematsu Akira

    The Japanese Forest Society Congress   118   412 - 412   2007

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  • Determining Seasonal Variation in Bamboo Forest Spectral Reflectance Using Satellite- and Ground-based Data Reviewed

    Nishikawa R., Murakami T., Otsuki K., Mizoue N., Yoshida S.

    JOURNAL OF THE JAPANESE FORESTRY SOCIETY   88 ( 6 )   473 - 481   2006

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    Seasonal variation in the spectra of bamboo, broadleaved forests, and coniferous forests was examined using multi-temporal SPOT/HRV and LANDSAT/TM data and ground-based spectral measurements. The satellite- and ground-based data revealed some common characteristics. In the visible red region, bamboo forests had the highest digital number and reflectance factor from April to June. In the near-infrared region, bamboo and broadleaved forests exchanged ranks from spring to summer. In the short-wavelength infrared region, bamboo forests had higher digital number than broadleaved and coniferous forests throughout the year. The three forest types showed significant differences in the near-infrared region from May to July and in the short-wavelength infrared region during the almost entire year. It is suggested that "leaf exchange" greatly affects seasonal variations in the spectra of bamboo forests.

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  • How is Short-wave Infrared (SWIR) Useful to Discrimination and Classification of Forest Types in Warm Temperate Region?

    Murakami Takuhiko

    Journal of Forest Planning   12 ( 2 )   81 - 85   2006

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    This study confirmed the usefulness of short wavelength infrared (SWIR) in the discrimination and classification of evergreen forest types. A forested area near Hisayama and Sasaguri in Fukuoka Prefecture, Japan, served as the study area. Warm-temperate forest vegetation dominates the study site vegetation. Coniferous plantation forest, natural broad-leaved forest, and bamboo forest were analyzed using LANDSAT5/TM and SPOT4/HRVIR remote sensing data. Samples were extracted for the three forest types, and reflectance factors were compared for each band. Kappa coefficients of various band combinations were also compared by classification accuracy. For the LANDSAT5/TM data observed in April, October, and November, Bands 5 and 7 showed significant differences between bamboo, broad-leaved, and coniferous forests. The same significant difference was not recognized in the visible or near-infrared regions. Classification accuracy, determined by supervised classification, indicated distinct improvements in band combinations with SWIR, as compared to those without SWIR. Similar results were found for both LANDSAT5/TM and SPOT4/HRVIR data. This study identified obvious advantages in using SWIR data in forest-type discrimination and classification.

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  • Prediction Model of the Occurrence Probability of Bark-stripping by Sika Deer (Cervus nippon) in Plantation Forests in Kumamoto Prefecture.

    Inoue T., Miyajima J., Murakami T., Mitsuda Y., Yoshida S., Imada M.

    JOURNAL OF THE JAPANESE FORESTRY SOCIETY   87 ( 2 )   111 - 116   2005

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    We analyzed the characteristics of 283 sites where sika deer caused bark-stripping damage in plantation forests in Kumamoto Prefecture, between 2000 and 2001. We developed four prediction models of the occurrence probability of bark-stripping damage using logistic regression. As independent variables, we used 16 factors, including topographic (elevation and slope angle), geographic (distance from the nearest road, <I>etc</I>.), vegetation (the number of cells used for forestry, agriculture, <I>etc</I>.), and stand (planted species and stand age) factors. The model with the lowest Akaike Information Criterion (AIC) and the greatest accuracy of classification showed that bark-stripping damage was strongly related to elevation, slope angle, and distance from the nearest road. The accuracy of the model was improved when the factors "planted species" and "stand age" were added. Finally, we drew a map showing the probability of bark-stripping damage. Such information should prove very useful in forest management planning.

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  • Characteristic of Temporal Range Shifts of Bamboo Stands according to Adjacent Landcover Type.

    Nishikawa R., Murakami T., Yoshida S., Mitsuda Y., Nagashima K., Mizoue N.

    JOURNAL OF THE JAPANESE FORESTRY SOCIETY   87 ( 5 )   402 - 409   2005

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    Multi-temporal aerial photos were processed into digital orthophotos to examine temporal range shifts of bamboo stands in relation to adjacent landcover. In both study areas, in Sasaguri and Tachibana, in Fukuoka Prefecture, Japan, the area of bamboo stands increased 1.3 to 1.7 times over about 30 years. Broadleaved forest occupied at least 40% of the area into which bamboo expanded. Areas of reduction of bamboo stands were also identified; the major cause was land alteration by humans. The bamboo invasion ratio was calculated as the ratio of the length of the adjacent edge initially to that after expansion in both study areas. The highest value was for grassy sites, followed by broadleaved forest. The bamboo front moved at about 1.11.6 m annually, and no difference among landcover types was found.

    DOI: 10.4005/jjfs.87.402

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  • Understand forest condition in Kyushu by using the national forest inventory data

    kitahara fumiaki, mitsuda yasushi, murakami takuhiko, mizoue nobuya, yoshida shigejirou

    The Japanese Forest Society Congress   116 ( 0 )   74 - 74   2005

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    DOI: 10.11519/jfsc.116.0.74.0

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  • Management System for Japanese Oak on the Kyushu University Forest in Hokkaido : Experiment for the 30-year Period

    Imada Morio, Yoshida Shigejiro, Murakami Takuhiko, Mitsuda Yasushi, Okano Tetsuro, Mizoue Nobuya, Inoue Akio, Teraoka Yukio, Kunisaki Takashi, Mabuchi Tetsuya

    Journal of Forest Planning   11 ( 1 )   33 - 44   2005

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    Since 1972, an experimental management system for Japanese oak (Quercus mongolica var. grosseserrata) has been studied in a natural Japanese oak forest, approximately 200ha in area, in the Kyushu University Forest in Hokkaido. The management system was based on the clearcutting system in tongue-shaped blocks surrounded by shelterbelts; rotation was 150 years. The silvicultural process in this management system was designed to produce high-quality timber. For 30 years between 1973 and 2002, the number of first-year oak seedling established by the silvicultural process averaged 55,000 per ha per year. For 30 years between 1972 and 2002, the area managed averaged 9.11 ha per year. For 30-years, the timber volume derived from thinning and final cutting averaged 198m^3 per year. The revenue obtained by selling this timber averaged 892,000 yen per year. The cost of silvicultural process averaged 557,000 yen per year, excluding the costs of staff and other factors owing to the Kyushu University Forest. Thus the average net revenue per year was 335,000 yen for the 30-years.

    DOI: 10.20659/jfp.11.1_33

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  • Growth of fir(Abies firma) seedlings and saplings in planted Japanese cyparis(Camaecyparis obutusa) stands with different thinning intensity.

    Ogawa Nobuko, Mitsuta Yasushi, Yoshida Shigejirou, Mizoue Nobuya, Murakami Takuhiko

    The Japanese Forest Society Congress   116 ( 0 )   748 - 748   2005

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    DOI: 10.11519/jfsc.116.0.748.0

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  • Effects of Suppression by Overstory Trees on Height Growth of Planted Sugi Individuals in Clearcutting Strips

    Araki Miho, Mizoue Nobuya, Mitsuda Yasushi, Murakami Takuhiko, Yoshida Shigejiro

    The Japanese Forest Society Congress   116 ( 0 )   749 - 749   2005

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    DOI: 10.11519/jfsc.116.0.749.0

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  • Landscape level environment affecting establishment of Abies-Tsuga seedlings on forest floor of hinoki(Chamaesyparis obtusa) plantations in Kirishima

    Kondo Miyuki, Mitsuda Yasusi, Yosida Shigejiro, Mizoue Nobuya, Murakami Takuhiko

    The Japanese Forest Society Congress   116 ( 0 )   758 - 758   2005

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    DOI: 10.11519/jfsc.116.0.758.0

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  • Seasonal variation in classification accuracy of forest-cover types examined by a single band or band combinations

    Takuhiko Murakami

    JOURNAL OF FOREST RESEARCH   9 ( 3 )   211 - 215   2004.8

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    In vegetation remote sensing, classification accuracy cannot be fixed, due to seasonal variations in spectral reflectance characteristics. This study aims to clarify the seasonal variability of classification accuracy by forest-cover type. In particular, this paper describes seasonal variability by each band or band combinations. The study area is located in the vicinities of Hisayama and Sasaguri in Fukuoka Prefecture, Japan. Natural broadleaved, coniferous plantation, and bamboo forests were studied. Supervised classification was applied to six SPOT/HRV images taken in 1997. Kappa analysis was applied to assess the classification accuracy and compare any two error matrices. The results revealed that some single band or two-band combinations were as accurate as, or more accurate than, the full band (all three bands). The disadvantages of using a full band were especially apparent in the season with high classification accuracy. This study indicates that using all given bands does not necessarily result in the highest classification accuracy. This study also suggests that band selection within the scope of forest type and seasonal variability can contribute to better forest-cover-type classifications.

    DOI: 10.1007/s10310-004-0075-1

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  • モニタリング調査データに基づく九州地方における収穫表の調整

    北原 文章, 吉田 茂二郎, 村上 拓彦, 光田 靖, 前田 勇平

    日本林学会大会発表データベース   115 ( 0 )   P2076 - P2076   2004

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:日本森林学会  

    1.はじめに&lt;BR&gt;近年,「森林原則声明」と「アジェンダ21」で示されているように,持続可能な森林経営の重要性が国際的に認識されている。わが国もヨーロッパ以外の温帯林と北方林諸国とで,モントリオールプロセスとして温帯林等の保全と持続可能な森林経営を評価するための基準・指標を合意した。わが国はこれまで森林簿のみを基礎とした森林資源の把握を行ってきたが,森林簿による森林情報からでは,この基準・指標に対応できない項目が多い。そこで1999年度からわが国でも森林資源モニタリング調査(以下モニタリング調査と記す)が行われることになった。&lt;BR&gt;現在九州のモニタリング調査点の内,スギ,ヒノキ人工林は多く,適正に人工林を管理することが重要になっている。今回,収量比数(Ry)を林分密度の指標としてとりあげ,民有林の密度管理図からRyを算出しその値により林分がどのような状態にあるかを把握し,適正な林分と判断できるものを抽出した。そ

    DOI: 10.11519/jfs.115.0.P2076.0

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  • Methodology Development for Area Determination of Rice Planted Paddy Using RADARSAT Data

    ISHITSUKA Naoki, SAITO Genya, MURAKAMI Takuhiko, OGAWA Sigeo, OKAMOTO Katsuo

    Journal of the Remote Sensing Society of Japan   23 ( 5 )   458 - 472   2003.12

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  • 広域空間スケールで捉えた伐採地の出現動向とシカによる新植地被害分布

    村上拓彦, 小泉透

    九州森林研究   56   101 - 104   2003

  • Minnaert constant of several forest types from SPOT/HRV data.

    MURAKAMI Takuhiko

    Journal of the Japan society of photogrammetry   41 ( 1 )   47 - 55   2002

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    Language:Japanese   Publisher:Japan Society of Photogrammetry and Remote Sensing  

    Minnaert correction method is one of the most appropriate models that correct topographic effects on remotely sensed data. However, the variations of the Minnaert constants have not been examined for any forest types. The purpose of this research was to investigate the extent of the variation of the Minnaert constant in three different forest types. Three forest types were selected for the analysis ; broad-leaved natural forest, coniferous plantations, and bamboo forest. 7 scenes of SPOT/HRV data observed in 1997 were selected and orthorectified with digital elevation models and digital topographic maps. The Minnaert constants were obtained through a regression analysis between solar incidence angles and the original satellite data. The results showed bands 1 and 2 indicated the seasonal variation of Minnaert constant, which had the peak in summer. In those bands, there were negative correlations between the solar zenith angles and the Minnaert constants. On the other hand, the band 3 indicated unclear variations in the Minnaert constants rather slight fluctuations. Then there was not significant correlation between the solar zenith angles and the Minnaert constants of the band 3. The results of this study suggested that visible band and near infrared one differ in the annual change pattern of the Minnaert constant.

    DOI: 10.4287/jsprs.41.47

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  • Crop discrimination with multitemporal SPOT/HRV data in the Saga Plains, Japan Reviewed

    T Murakami, S Ogawa, N Ishitsuka, K Kumagai, G Saito

    INTERNATIONAL JOURNAL OF REMOTE SENSING   22 ( 7 )   1335 - 1348   2001.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:TAYLOR & FRANCIS LTD  

    Nine scenes of SPOT/HRV data obtained in eight different months in 1997 were evaluated for crop discrimination in the Saga Plains, Japan. All images were atmospherically corrected with the 6S code. Annual Normalized Difference Vegetation Index (NDVI) profiles were generated to characterize seasonal trends in six cropping systems (rice, rice-winter cereal, soybean, soybean-winter cereal, lotus, and rush). The dataset of this study showed the unique temporal change patterns of NDVI for each cropping system. Separability analyses determined optimal scene combinations for the highest accuracy in classifying the cropping systems. The scene combinations for the accurate classification of cropping systems were obtained from three separability measurements (Euclidean spectral distance, divergence, and Jeffries-Matsushita distance). Kappa statistics were applied to evaluate the classification accuracies. The four-scene combination that was derived from April, June, July and September classified the cropping systems almost as well as those combinations including more scenes. A colour composition technique applied to the three-scene combination that showed the highest separability also discriminated each cropping system. Based on these results, we can request observations during specific time intervals considering local crop calendars and environmental conditions.

    DOI: 10.1080/01431160151144378

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  • Area Estimation of Rice Planting Fields with VSW Index Reviewed

    MURAKAMI Takuhio, SAITO Genya, OGAWA Susumu, ISHITUKA Naoki

    Journal of the Remote Sensing Society of Japan   21 ( 4 )   330 - 341   2001

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.11440/rssj1981.21.330

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  • Calculation of topographical factors and their accuracy evaluations with Digital Map 50-m grid published by the Geographical Survey Institute Reviewed

    MURAKAMI Takuhiko, TERAOKA Yukio, IMADA Morio

    Japanese Journal of Forest Planning   34 ( 1 )   13 - 26   2000

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Society of Forest Planning  

    We calculated three topographical factors (effective relief, topographical exposure and slope-center angle) with the "Digital Map 50-m grid", a digital elevation model (DEM) published by the Geographical Survey Institute, Japan. The objectives of this study were to show new algorithms for the calculation of the topographical factors from DEM, and to evaluate their accuracy. We proposed new algorithms for the topographical exposure and the slope-center angle. Both topographical factors measured on topographical maps and calculated from DEM were compared. The Digital Map 50-m grid data were resampled by the cubic convolution interpolation. The root mean squared (RMS) error for the elevation value of the DEM was 7.15m and gave good agreement with the theoretical value (7.2m). The RMS error of the effective relief was 8.61m, the topographical exposure was 27.39 degrees, and the slope-center angle was 13.57 degrees. The correlations between the errors of elevation on DEM and the errors of each topographical factor were also examined. The errors of elevation on DEM correlated positively with the errors of the topographical exposure and the slope-center angle, and negatively with those of the effective relief.

    DOI: 10.20659/jjfp.34.1_13

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  • Application of ALOS data for agriculture monitoring on East Asia Reviewed

    G Saito, S Ogawa, T Murakami, N Ishitsuka

    IGARSS 2000: IEEE 2000 INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOL I - VI, PROCEEDINGS   2412 - 2413   2000

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

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  • ランドサットTMデータに与えられた地形の影響の補正方法の比較

    村上拓彦, 藤井秀亮, 今田盛生

    九州大学農学部演習林報告   78 ( 78 )   13 - 28   1998

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  • Discussion at the 39th symposium of Japan Society of Forest Planning : Criteria and indicators for sustainable forest management : Present state of Europe

    MURAKAMI Takuhiko, NAITO Kenji

    Japanese Journal of Forest Planning   29   89 - 98   1997

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    Language:Japanese   Publisher:Japan Society of Forest Planning  

    DOI: 10.20659/jjfp.29.0_89

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Books

  • リモートセンシング事典

    日本リモートセンシング学会( Role: Contributor ,  4-20画像分類:サポートベクタマシン)

    丸善出版  2022.12  ( ISBN:9784621307762

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    Total pages:xxiii, 730p   Language:Japanese

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  • 森林計画学入門

    田中, 和博, 吉田, 茂二郎, 白石, 則彦, 松村, 直人(コラム9.3 森林管理とリモートセンシング)

    朝倉書店  2020.4  ( ISBN:9784254470550

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    Total pages:viii, 196p   Language:Japanese

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  • 防災・環境のためのGIS

    山岸宏光編著( Role: Contributor ,  9章 九州における再造林放棄地の実態把握)

    古今書院  2018 

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  • 森林リモートセンシング 第4版

    村上 拓彦( Role: Contributor)

    日本林業調査会  2014 

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  • 植生のリモートセンシング

    村上 拓彦( Role: Contributor)

    森北出版  2013 

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  • 森林リモートセンシング 第3版―基礎から応用まで

    加藤 正人( Role: Contributor)

    日本林業調査会  2010.4  ( ISBN:4889651985

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    Total pages:443   Language:Japanese

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  • ビジネス・行政のためのGIS

    村山, 祐司, 柴崎, 亮介( Role: Contributor ,  4章 林業とGIS)

    朝倉書店  2008.3  ( ISBN:9784254168341

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    Total pages:vii, 196p   Language:Japanese

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  • 改訂 森林リモートセンシング : 基礎から応用まで

    加藤, 正人( Role: Contributor)

    日本林業調査会  2007.4  ( ISBN:9784889651720

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    Total pages:358p, 図版viiip   Language:Japanese

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  • 農業リモートセンシング・ハンドブック

    秋山侃, 石塚直樹, 小川茂男, 岡本勝男, 斎藤元也, 内田諭 編著( Role: Contributor)

    システム農学会  2007.1  ( ISBN:9784990447106

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    Total pages:512p   Language:Japanese

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  • 森林資源管理と数理モデル Vol.4 FORMATH NAGOYA 2004

    近藤洋史, 吉本敦, 松村直人編( Role: Contributor ,  多時期SPOT/HRVデータから検討した異なる森林タイプ間のMinnaert定数の比較とその同一性.)

    森林計画学会出版局  2005.3  ( ISBN:4915870316

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    Total pages:ii, 194p   Language:Japanese

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  • 森林組織計画

    今田, 盛生( Role: Contributor)

    九州大学出版会  2005.3  ( ISBN:4873788587

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  • The Role of Forest for Coming Generations -Philosophy and Technology for Forest Resource Management-

    Naito, K. e( Role: Contributor ,  The Minnaert constant obtained from a stratified sample based on topographic conditions)

    Japan society of forest planning press  2005 

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  • 景観生態学 : 生態学からの新しい景観理論とその応用

    Turner, Monica Goigel, Gardner, R. H., O'Neill, R. V. (Robert V.), 名取, 睦, 名取, 洋司, 長島, 啓子, 村上, 拓彦, 中越, 信和, 原, 慶太郎( Role: Joint translator)

    文一総合出版  2004.9  ( ISBN:4829910623

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    Total pages:399p, 図版ivp   Language:Japanese

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  • 森林リモートセンシング : 基礎から応用まで

    加藤, 正人( Role: Contributor)

    日本林業調査会  2004.4  ( ISBN:4889651489

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  • The use of multi-temporal SPOT/HRV data for monitoring agriculture in the Saga Plains, Japan

    Application of Remote Sensing Technology for the Management of Agricultural Resources  2002 

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Awards

  • 黒岩菊郎記念研究奨励賞

    2008.3   森林計画学会  

    村上 拓彦

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  • 日本写真測量学会年次学術講演会論文賞

    2000.5  

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Research Projects

  • Forest productivity mapping by fusion of multi-temporal aerial photographs and aerial laser scanning

    Grant number:22K05726

    2022.4 - 2025.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

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    Grant amount:\3900000 ( Direct Cost: \3000000 、 Indirect Cost:\900000 )

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  • Crown extraction and tree species classification of broadleaf forests using UAV aerial photography derived on leaf-on and -off seasons

    Grant number:19K06143

    2019.4 - 2022.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Murakami Takuhiko

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    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

    Several studies were performed on individual scale tree species classification, tree crown extraction, and tree stem extraction in broadleaf forests using UAV aerial imagery. In the tree species classification, object-based image classification was performed for natural forests consisting mainly of beech forests, and classification was successfully performed with a Kappa coefficient of 0.726. For individual scale crown extraction, we tried two methods: the valley following method and the lidR package. The accuracy of tree crown extraction was verified for each. For tree stem extraction, UAV aerial photography was conducted in a beech stand during the leaf-off season, and the reconstruction of tree stems was evaluated for several parameters. The direction of the camera (camera angle) was also considered in the tree stem extraction, and the reconstruction rate of tree trunks was higher when the oblique view was employed in addition to the nadir view.

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  • Ecological structure of abandoned coppice beech stands and its potential for timber production, distributed in the mountainous heavy snowfall region.

    Grant number:15K07474

    2015.4 - 2018.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Kamitani Tomohiko

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    Grant amount:\4940000 ( Direct Cost: \3800000 、 Indirect Cost:\1140000 )

    In the mountainous heavy snowfall region, we examined the possibility of sustainable beech forestry, due to effective estimation of beech volume in stand scale, measurement of available beech round timber from stand volume, criteria for sustainable harvest of selective logging and thinning, furthermore, ecological character.
    On GIS system, we cut the study area of 700 hectares into the mesh size of 50 meters and then estimated stand volume in each mesh from an equation with tree crown area measured on the aerial photos. Following the total stand volume, we proposed a group selection system in an analogous manner to primeval forests recurring in cycle of one hundred years. Intense thinning should be effective for growing sufficiently of the high dense seedlings regenerated in advance. We also showed that the trees with hollows should be left for nesting site as much as possible in a harvest stand for the biodiversity forest management.

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  • Effects of adjacent land-use on the distrbution of sandy shore crustaceans

    Grant number:25340114

    2013.4 - 2016.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    Takada Yoshitake, MURAKAMI Takuhiko, KOGURE Youichi, ABE Shinichiro

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    Grant amount:\3640000 ( Direct Cost: \2800000 、 Indirect Cost:\840000 )

    At a sandy shore in Sado Island, density of small crustaceans once declined by the construction of a new road along the shore, but the density increased afterwards. Survey on sandy shores along the Japan Sea coast of Honshu revealed 28 taxonomic groups and 7 types of community. Relationships between the occurrence of the communities and environmental factors were investigated with an aid of GIS data processing. As a result, three vertical zones were generally recognized. Statistical models did not detect any significant effects of artificial constructions (e.g. seawalls) on the occurrence of the shore communities. But, an examination using BIOLOG plates indicated that activity of bacteria was different between the shores with different land-use.

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  • Development of the image processing system with remotely sensed data for plantation forest thinning support

    Grant number:24780145

    2012.4 - 2014.3

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Young Scientists (B)

    Awarding organization:Japan Society for the Promotion of Science

    MURAKAMI Takuhiko

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    Grant amount:\4420000 ( Direct Cost: \3400000 、 Indirect Cost:\1020000 )

    We propose a new method of extracting plantation boundary through multi-temporal image analysis using past aerial photos which have been taken by the Forestry Agency and the Geographical Survey Institute, Japan. Clear cut and planted sites were extracted with the second principal component of the principal component analysis of a two-year composite image of brightness or DSM data. This proposed method presented the possibility to delineate the boundary of the plantation.
    We focused on local maximum filtering method as one of the extraction methods for single tree apex, and performed the stand density estimation of Japanese cedar plantation using GeoEye-1 panchromatic image (0.5-m spatial resolution). In this paper, we examined about the effect of filter size of maximum filter or low-pass filter for noise reduction on stand density estimation.

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  • Spatial variations in productive structure of small crustaceans on sandy shores

    Grant number:22510252

    2010 - 2012

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (C)

    Awarding organization:Japan Society for the Promotion of Science

    TAKADA Yoshitake, YAMAHIRA Kazunori, MURAKAMI Takuhiko, KOGURE Youichi, FUJII Tetsuo, KAJIHARA Naoto

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    Grant amount:\2860000 ( Direct Cost: \2200000 、 Indirect Cost:\660000 )

    ):Density of Haustorioides japonicus in summer shows a spatial variation. Recruitment of juveniles caused this variation, but the other life history characteristics did not affect it. Location of sandy shores including slope of offshore seafloor could explain this variation, while analyses on food web structure and genetic composition could not. So, these results suggested that the spatial variation in production of H. japonicus was due to the effect of shore environment on its early life stage.

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  • Evaluation of a suitable habitat for the crested ibis and the restoration scenario with satellite tracking of the re-introduced ibis

    Grant number:21310149

    2009 - 2011

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    SEKIJIMA Tsuneo, KAWAGUCHI Yoichi, MIYASHITA Tadashi, MITANI Yasuhiro, MURAKAMI Takuhiko, MIGUCHI Hideo, NAGATA Hisashi, AMANO Tatsuya

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    Grant amount:\17160000 ( Direct Cost: \13200000 、 Indirect Cost:\3960000 )

    To complete a restoration scenario for the resettlement of the crested ibis, we created the potential maps for predicting prey biomass, nesting habitat, and foraging habitat of ibis, using generalized linear model. By reflecting this information on the Sado city's strategy for improving biodiversity, a system that verify effectiveness of restoration scenario and modify it sustainably could be built up. Next, in order to evaluate whether re-introduced population will persist for 50 years on Sado Island, population viability analysis(PVA) was conducted using population parameters of wild population in China and revealed that establishment of the re-introduced population on Sado island will be difficult under current fragile reproduction.

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  • Extraction of un-thinned stands based on object-oriented image segmentation method

    Grant number:19780113

    2007 - 2008

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Young Scientists (B)

    Awarding organization:Japan Society for the Promotion of Science

    MURAKAMI Takuhiko

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    Grant amount:\3590000 ( Direct Cost: \3200000 、 Indirect Cost:\390000 )

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  • Multiple functions of rubber plantations as for est and wood resources

    Grant number:18255009

    2006 - 2009

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (A)

    Awarding organization:Japan Society for the Promotion of Science

    MIZOUE Nobuya, YOSHIDA Shigejiro, SATO Noriko, GYOKUSEN Koichro, KOGA Shinya, SAKUTA Kotaro, KOROKI Katsuhisa, ITO Satoshi, MURAKAMI Takuhiko

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    Grant amount:\25480000 ( Direct Cost: \19600000 、 Indirect Cost:\5880000 )

    The objective of this research is to evaluate new functions of rubber plantations as forest and wood resources, not only as cash crop and its by-product. We first clarified importance of rubberwood in wood markets in Malaysia, Thailand and Cambodia. And we evaluated wood production and carbon uptake functions, through developing biomass and stem volume equations and investigating wood quality.Finally, we examined interactions between wood and latex production, and climate factor, finding clear trade-off of wood and latex production in rainy season.

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  • Establishment of Monitoring and Modeling Systems of Forest Ecosystem Dynamics for Evaluating the effects of Climate Changes

    Grant number:17380096

    2005 - 2007

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    OTSUKI Kyoichi, KUMAGAI Tomo'omi, ENOKI Tsutomu, CHIWA Masaaki, KOMATSU Hikaru, TAKAGI Masahiro

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    Grant amount:\16310000 ( Direct Cost: \15200000 、 Indirect Cost:\1110000 )

    The object of the research was to establish monitoring and modeling systems of forest dynamics and hydrological and material cycles based on the observations in the four university forests in different climate, and establish the process-based models for evaluating and forecasting the effects of climate changes. Seven monitoring plots for long-term ecological research were set, and the forest data of various forest types were archived by the monitoring using the methods used in the Monitoring 1000 Project of Ministry of Environment Some remote sensing techniques for monitoring forest dynamics were also established. Evapotranspiration process studies based on the sap flow measurement were conducted in various forest stands (Japanese cedar, Japanese cypress, oak, bamboo). Some features of evapotranspiration processes of each forest were obtained, and the guides to measure sap flow for each forest were proposed. By investigating the reported results of long-term water budget and flux measurements, the effects of growth, density and types of forests on the catchment water budget were clarified, and some practical process-based models of evapotranspiration were proposed. The monitoring of hydrological and material cycles was conducted in the serpentinite watershed where these studies were rarely conducted in Japan. The results suggested that the common processes found in other watersheds could not always be applied to the other watershed where the bedrocks were different The results also indicated that the run off process (suspended / soluble) of nitrogen and phosphorus were considerably different depend on the discharge, and proposed the practical models to estimate the discharges of these nutrients. Hydrological process-based model was made, and effects of climate changes on the discharge from the forest catchment in the snowy region were analyzed. Although these results were not fully integrated, many new data, information, techniques, and models obtained in this project will contribute to the researches on global warming.

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  • Quality assurance and effective utilization of forest resource monitoring data

    Grant number:17380099

    2005 - 2007

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    MIZOUE Nobuya, YOSHIDA Shigejiro, MURAKAMI Takuhiko, ITO Satoshi

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    Grant amount:\15750000 ( Direct Cost: \15300000 、 Indirect Cost:\450000 )

    National Forest Inventories (NFIs) have been carried out in many countries , and historically, NFIs were very much oriented toward describing state and change of forests with regard to timber production . Over recent decades, there is an increased demand for information on non-productive functions of forests due to the requests of policy makers and the public's perception of forests . Quality Assurance (QA) is essential in long-term and large-scale environmental monitoring programs to ensure a documentation of quality of the field data and allow a data quality evaluation. However, there has been very limited information of current level of NFI data quality over the world.
    We evaluated data quality of Japanese National Forest Inventory, which had started in 1999 and had not carried out quality assurance program. Forty eight plots in four prefectures were remeasured by a control team, making careful and unhurried measurements. The paired data between field teams of each prefecture and the control team were evaluated, including two tree-level valuables (DBH and total height) and seven plot-level valuables (tree count, tree species richness, understory vegetation species richness and 4 of topographic condition). As compared to the control team, all field teams of each prefecture tended to significantly underestimate all of the continuous valuables. Most variables had larger variability as compared to the published literature, without achieving measurement quality objectives adopted in other monitoring programs. The findings of consistent bias and large variation of the field team measurements call for urgent implementation of quality assurance (QA) program (extensive field training and regular remeasurement) to improve data quality in Japan as well as countries without QA program. This study also suggested to promote international comparisons of data quality data to standardize the quality level at global scale.

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  • ニホンジカ生息地を取り巻く環境の時系列変化はどこまで把握できるのか?

    Grant number:16780116

    2004 - 2005

    System name:科学研究費助成事業

    Research category:若手研究(B)

    Awarding organization:日本学術振興会

    村上 拓彦

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    Grant amount:\3200000 ( Direct Cost: \3200000 )

    本研究は対象地を九州本島に限定し,伐採地の時間的・空間的出現動向とシカ生息・被害分布について10〜30年の時間スケールからその関連性を検討することを目的としている。また,九州におけるシカ生息分布域の変化について,その特徴を各種空間データから検討した。今年度は後者について取り組んだ。
    まず,環境省(環境庁)の野生動物保護調査に関するデータ(第2回自然環境保全基礎調査(1980),第6回自然環境保全基礎調査(2004))からシカ生息の分布拡大が起こった地域,シカ生息のみられなくなった地域など4タイプのシカ生息分布変化パターンを規定し,標高値,土地利用などの集計を行った。その結果,シカの生息が元々確認される地域は高標高域に存在し,新たにシカの拡大がみられた地域は低標高域にあることが示された。シカの拡大が森林率の高い高標高域から,周辺の低標高域にむかったことがはっきりした。
    シカの分布拡大のみられた地域,みられなかった地域の特徴をみるため,ロジステック回帰分析と分類樹(Classification tree)による解析を試みた。その結果,ロジステック回帰分析では,天然林面積,森林面積,標高が説明因子として採用された。また,分類樹の結果においても天然林面積,標高が有効な因子として選択された。二つの異なる統計的アプローチにおいて,天然林面積,標高が採用されたことから,これら二つの因子がシカの分布拡大を説明する上で重要なものであることがわかった。

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  • Relationships between woodfuel consumption, forest biomass and biodiversity - Case study in Cambodia

    Grant number:15405024

    2003 - 2005

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    MIZOUE Nobuya, KAI Shigetaka, ITO Satoshi, YOSHIDA Shigejiro, MURAKAMI Takuhiko

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    Grant amount:\11100000 ( Direct Cost: \11100000 )

    Woodfuel is essential for daily life in many countries, but there have not been enough information on effects of woodfuel consumption on forest condition. The objectives of this study were to assess effects of woodfuel consumption on quantity (biomass) and quality (biodiversity) of forests and to propose some strategies for sustainability of both woodfuel use and forest resources, in Kampong Thom Province, Cambodia as a case study site.
    First, we investigated the relationships between woodfuel consumption and forest biomass increment for each of three village groups ; remote area, populated area and intermediated areas, using GIS. The woodfuel consumption rate was estimated by interview surveys and the forest biomass increment was estimated using data of forest inventory and permanent sample plots (PSPs). The result showed that woodfuel consumption was larger than biomass increment in the area within 3 km from the National road.
    Second, we did more detailed interview surveys for 200 households to assess differences in woodfuel consumption patterns among three village group. The results showed that people do not cut and use trees with DBH more than 30 cm for firewood and they collect firewood also in non-forest area. Considering these interview results, we re-assessed the balance between woodfuel supply (increment) and demand (consumption)
    Third, to estimate forest biomass in details, we did re-measurement for 32 PSPs in Kampong Thom Province and for 20 PSPs in Koh Kong Province, and we did establish and re-measure 15 new PSPs in regrowth forest in Kampong Thom Province The results from these measurements were incorporated in the above re-assessment.
    Forth, we examined the relationship between stand structure and species diversity of forest inventory plots and human population density within different distance from the plots. The result showed that tree density, stem volume and biomass had negative correlation with population density with 5 km from the plots.
    Finally we measured stand structure in forests that local people actually recognized as suitable sites for firewood collection, and we clarified which species local people preferably selected

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  • 再造林放棄地の評価に関する研究

    Grant number:15658050

    2003 - 2004

    System name:科学研究費助成事業

    Research category:萌芽研究

    Awarding organization:日本学術振興会

    吉田 茂二郎, 村上 拓彦

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    Grant amount:\2900000 ( Direct Cost: \2900000 )

    大分県に分布している放棄地の位置・立地条件の把握,および現植生状況の調査ならびに周辺森林の現地調査から,放棄地の立地条件と森林回復状態を同時に把握解析することで,再造林放棄地の森林機能問題(水土保全機能の低下等)の真偽を明らかにすることである。具体的には,以下の通りである。(1)放棄地の立地条件を解析し,立地的によい場所が放棄され森林資源の減少につながるのかを明らかにする。(2)放棄地の植生調査から,造林をしないことで本当に植生が回復しないのか,斜面崩壊などが実際に発生しているのかを明らかにする。(3)放棄地は年数の経過にともなう植生遷移の状況を明らかにする。
    (1)については,林道から近い比較的立地的によい場所が放棄されている傾向があった。(2)(3)については,放棄地の現地調査を行い,すべての放棄地で植生の回復を確認した。さらに植生の回復状況を分析して,比較的クラスター分析の結果,全75プロット(1プロットは上層に植生が見られなかったことから,解析から除外)を7群に分類することができた。各分類群は共通主要樹種により,シロダモ群,アラカシ群,クサギ群,カナクギノキ群,クマノミズキ群、アカメガシワ・ヌルデ群、その他群であった。また,遷移の初期段階で先駆性樹種が優占する群と萌芽再生によって植生が回復している群があること,また放棄年数が長くなると先駆性樹種が優占していた植生群が徐々にアラカシなどの二次林優占樹種が優占する植生群に変化することは明らかとなった。
    以上のように,放棄地における植生の回復は順調であり,斜面崩壊の危険性,水土保全機能の低下について,さほど大きな心配はないことがわかった。

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  • 過去の林業活動とニホンジカによる林業被害の関連

    2002

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    Grant type:Competitive

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  • 針葉樹人工林の広葉樹への誘導に適応した等高曲帯状画伐システムの適用試験

    Grant number:13876037

    2001 - 2002

    System name:科学研究費助成事業

    Research category:萌芽研究

    Awarding organization:日本学術振興会

    今田 盛生, 井上 晋, 村上 拓彦, 吉田 茂二郎

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    Grant amount:\1800000 ( Direct Cost: \1800000 )

    本研究代表者は、不健全状態にある針葉樹人工林を各地域本来の広葉樹天然林へ逆誘導する森林経営システムとして、画伐方式を基本とした「等高曲帯状画伐システム」の基本設計を終了した現状下にある。この基本設計を現地に適用可能な森林経営システムとして詳細設計するために、このシステムの適用可能性を大きく左右するキーポイント、すなわち等高線に沿った等高曲帯状伐区の画伐による伐出作業が経営上支障無く実行可能か否かを検証するのが本研究の目的である。
    今年度は、対象として霧島屋久国立公園内のヒノキ人工林で、今後の取り扱い問題の緊急度が高まった霧島国有林のヒノキ若齢人工林を中心に次のような研究を行った。1)帯状伐区の設定:研究対象地のヒノキ若齢人工林に、帯長(等高線に沿った長さ)と帯幅(落水線方向の幅)が異なる複数個の等高曲帯状伐区を設定するために地形測量を行った。2)等高曲帯状伐区内および周辺林分の立木調査:各等高曲帯状伐区内の立木を、伐区内に侵入した広葉樹を含めて調査し、対象林および周辺林分の林分構造と種構成を明らかにした。3)対象地域内の諸データによる施業・搬出方法の解析:対象地域内の地形、林道データならびに諸条件下における搬出に関する資料を収集した。
    その結果、ヒノキ人工林に接している保護樹帯が、遺伝資源が豊富な天然林と同様の林分構造を示して母樹となりうる樹木が存在し、かつ保護樹帯内ではモミと広葉樹の更新が継続的に行われていることがわかった。さらに、周辺林分の調査から、アカマツとツガについても光条件によっては更新可能であることもわかった。よって、画伐によって光環境の改善をすることで充分に更新可能で、天然林への逆誘導に関しては、自然・地形条件的には伐出作業も含めて実行可能であることが明らかとなった。

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  • Application Study on Forest Management System and Silvicultural Process for High Quality Timber Production of Japanese Oak

    Grant number:12460071

    2000 - 2002

    System name:Grants-in-Aid for Scientific Research

    Research category:Grant-in-Aid for Scientific Research (B)

    Awarding organization:Japan Society for the Promotion of Science

    IMADA Morio, TERAOKA Yukio, OKANO Tetsuo, YOSHIDA Shigejiro, KUNISAKI Takashi, MIZOUE Nobuya, INOUE Akio, MURAKAMI Takuhiko

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    Grant amount:\5400000 ( Direct Cost: \5400000 )

    In April 1972, an experimental management system for Japanese oak (Quercus mongolica var. grosseserrata) was established in a natural Japanese oak forest, approximately 200 ha in area, in the Kyushu University Forest in Hokkaido. The management system was imposed by dear-cutting system in tongue-shaped blocks surrounded by shelterbelts. Rotations were 150 years and cutting blocks for staggered annual cutting were set up. The natural stands containing these blocks have been managed by a silvicultural process designed to produce high-quality timber from Japanese oak. The results obtained for 30 years between 1972 and 2001 (the first, second and third periods) are follows;.
    1) The number of first-year oak seedlings established by regeneration process per ha varied widely-from 5,000 (in 2001) to 133,000 (in 1974); it averaged 55,500. Such variation was due to noted variations in size of seed crop for natural forests of Japanese oak. 2) When the stands established by the regeneration process developed into near the 15-year-old stand, vertical stratifications were distinguished in the canopy on the same manner as the above established stands. 3) In the 15- to 22- year-old stand, the height of the upper oak trees seemed to be somewhat lower than the one of the upper trees progressing with wide variations. 4) In the established stands by the regeneration process from 15- through 29-year-old, whereas the DBH of the upper trees was varied between the 15- and 21-year-old stand, the diameter growth was nearly constant (approximately 5 mm per year) in the 21- through 29-year-old stands. 5) In the 35- to 57-yearold stand, the stand volume of the upper trees seemed to increase with an increase in stand age progressing with wide variations. 6) The average net annual revenue for the 30-year period was 335,000 yen, an amount calculated by subtracting the average cost per year (557,000 yen) from the average revenue per year (892,000 yen).
    Investigating the profitability of this applied management system and improving its shortcomings will require that the experiment be continued over a long period.

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  • Forest monitoring with remote sensing

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    Grant type:Competitive

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  • リモートセンシングによる森林モニタリング

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    Grant type:Competitive

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Teaching Experience (researchmap)

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Teaching Experience

  • 流域環境学

    2022
    Institution name:新潟大学

  • スタディ・スキルズAIIa

    2022
    Institution name:新潟大学

  • スタディ・スキルズAIIb

    2022
    Institution name:新潟大学

  • スタディ・スキルズAIIc

    2022
    Institution name:新潟大学

  • スタディ・スキルズAIa

    2021
    Institution name:新潟大学

  • スタディ・スキルズAIc

    2021
    Institution name:新潟大学

  • スタディ・スキルズAIb

    2021
    Institution name:新潟大学

  • 農学入門II

    2021
    Institution name:新潟大学

  • 地理情報システム(GIS)概論・演習

    2021
    Institution name:新潟大学

  • 学科インターンシップ

    2021
    Institution name:新潟大学

  • 農学入門I

    2021
    Institution name:新潟大学

  • 副専攻GISリテラシー入門

    2021
    Institution name:新潟大学

  • 基礎地学

    2021
    Institution name:新潟大学

  • 環境統計学

    2020
    Institution name:新潟大学

  • 卒業論文

    2020
    Institution name:新潟大学

  • 卒業論文Ⅰ

    2020
    Institution name:新潟大学

  • 卒業論文Ⅱ

    2020
    Institution name:新潟大学

  • スタディ・スキルズA b

    2020
    Institution name:新潟大学

  • フィールド科学インターンシップ

    2019
    -
    2021
    Institution name:新潟大学

  • 学科インターンシップ

    2019
    Institution name:新潟大学

  • 自然科学総論Ⅴ

    2019
    Institution name:新潟大学

  • フォレスター入門

    2018
    Institution name:新潟大学

  • 流域環境GIS

    2018
    Institution name:新潟大学

  • 農学入門Ⅱ

    2018
    Institution name:新潟大学

  • 農学入門Ⅰ

    2018
    Institution name:新潟大学

  • 新潟の農林業

    2017
    Institution name:新潟大学

  • 基礎地学

    2017
    -
    2021
    Institution name:新潟大学

  • バイオマスと農林水産業

    2017
    Institution name:新潟大学

  • 新潟の農業

    2017
    Institution name:新潟大学

  • 地理情報システム(GIS)概論・演習

    2016
    -
    2018
    Institution name:新潟大学

  • 計画系演習及び実習

    2016
    -
    2017
    Institution name:新潟大学

  • トキをシンボルとした自然再生

    2015
    -
    2016
    Institution name:新潟大学

  • 地理情報システム(GIS)概論・応用演習

    2014
    Institution name:新潟大学

  • 環境科学特定研究Ⅱ

    2013
    -
    2015
    Institution name:新潟大学

  • 環境科学総合演習Ⅱ

    2013
    -
    2015
    Institution name:新潟大学

  • 環境科学セミナーⅡ

    2013
    -
    2015
    Institution name:新潟大学

  • 研究発表演習Ⅱ(中間発表)

    2013
    -
    2015
    Institution name:新潟大学

  • 環境科学特定演習Ⅱ

    2013
    -
    2015
    Institution name:新潟大学

  • 研究発表演習Ⅱ(学外発表)

    2012
    -
    2015
    Institution name:新潟大学

  • 森林環境インターンシップ

    2011
    -
    2017
    Institution name:新潟大学

  • 森林資源解析学

    2011
    -
    2012
    Institution name:新潟大学

  • 森林資源情報学特論

    2011
    Institution name:新潟大学

  • 技術者倫理・自然環境関連法規

    2010
    Institution name:新潟大学

  • GIS・リモートセンシング演習

    2010
    Institution name:新潟大学

  • 森林計画学

    2010
    -
    2017
    Institution name:新潟大学

  • 技術者倫理

    2010
    Institution name:新潟大学

  • 自然環境関連法規

    2010
    Institution name:新潟大学

  • 生態環境GIS

    2009
    -
    2017
    Institution name:新潟大学

  • 持続可能な森林経営演習

    2008
    Institution name:新潟大学

  • リモートセンシング

    2008
    Institution name:新潟大学

  • 生産環境科学概論Ⅱ

    2008
    -
    2018
    Institution name:新潟大学

  • 森林空間計測学特論

    2007
    Institution name:新潟大学

  • 森林空間情報学

    2007
    Institution name:新潟大学

  • 経営系演習及び実習

    2007
    -
    2015
    Institution name:新潟大学

  • 森林経営計画学

    2007
    -
    2010
    Institution name:新潟大学

  • 情報処理演習

    2007
    -
    2010
    Institution name:新潟大学

  • 生態環境計測学

    2007
    -
    2009
    Institution name:新潟大学

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