Publishing type：Research paper (international conference proceedings)  

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Authorship：Lead author   Publishing type：Research paper (international conference proceedings)  

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Publishing type：Research paper (scientific journal)   Publisher：Wiley  

Abstract

A rapid increase in wind power generation has led to bird collisions becoming a serious problem worldwide. Developing useful sensitivity maps to select low‐risk sites for birds is an urgent issue. For migratory birds, such as geese and swans, that visit different habitats throughout their life cycle, it is important to conduct risk assessments that take into account their behavioural characteristics in each habitat. Geese and swans fly and migrate at varying altitudes (above the ground) ranging from 10 to hundreds of metres. Accurate predictions of avian flight altitudes are essential in assessing the risks of collisions with human‐made structures.

We first obtained location data for four species of geese and swans to identify their spring migratory routes within Japan (Bean Goose Anser fabalis and Anser serrirostris, Greater White‐fronted Goose Anser albifrons, Tundra Swan Cygnus columbianus bewickii and Whooper Swan Cygnus cygnus). As all four species used the same roosts and overlapping foraging areas from winter to spring, a single migratory route was defined by integrating the location data of the four species.

Flight trajectories were tracked using an ornithodolite. The median flight height for these four species in all landscape types was 150 m or less. Then a LASSO regression model was created with flight altitude obtained as the response variable and topographic and landscape factors as explanatory variables. Trends in flight altitude with environmental differences were similar for the four species, indicating that topographical factors strongly influence flight altitude. Finally, a statistical model was used to predict flight altitudes along migration routes.

The sensitivity maps we generated showed that for all four species, most flight heights during spring were within the wind turbine range, suggesting that their risk of collision with wind turbines was greater along their migratory route. Sensitivity maps that accurately reflect avian flight characteristics help provide useful information when considering the location of further wind turbine construction.

DOI： 10.1002/2688-8319.12222

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Authorship：Lead author  

DOI： 10.14943/lowtemsci.81.89

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Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

DOI： 10.2208/jscejj.23-26018

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Publishing type：Research paper (scientific journal)   Publisher：The City Planning Institute of Japan  

DOI： 10.11361/journalcpij.57.1301

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Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Zoological Society of Japan  

DOI： 10.2108/zs210014

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Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

DOI： 10.2208/jscejer.78.6_ii_63

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Language：Japanese   Publisher：The Ecological Society of Japan  

In recent years, wind-power facilities have been rapidly constructed along the Japanese coastline, from Northern Hokkaido to Tohoku. This area is a wintering and stopover zone and coincides with a major flyway for migratory geese and swans. Wind farm construction can directly and indirectly affect migratory birds through habitat loss, abandonment of wintering sites, direct mortality, and increased energy costs resulting from detours to avoid such facilities. Sensitivity maps visualising areas of greater collision risk to migratory birds represent a powerful tool for habitat conservation, while continuing to encourage renewable energy development. In this review, we first outline the current state and relevant issues of sensitivity mapping for large waterfowl, then provide two sensitivity maps for Middendorf’s bean goose. The first map provides a sensitivity score based on the probability of a goose flight path intersecting with the turn area of a windmill blade at wintering and stopover sites, and the second map shows the predicted altitudes of geese flight paths based on landscape and topographic factors along the major migratory route. Finally, we propose a systematic approach to assess putative wind farm locations, considering the outcomes of sensitivity mapping.

DOI： 10.18960/hozen.1922

CiNii Article

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Authorship：Lead author,　Corresponding author   Language：Japanese   Publisher：The Mammal Society of Japan  

<p>The distributions of <i>Mogera etigo</i> and <i>Mogera imaizumii</i> were examined in two areas of the Echigo Plain, Niigata Prefecture. The first survey area was in the paddy fields of the southern region of the Kounan area, Niigata city. The second was in the paddy fields in the surroundings of central Gosen city. In the Kounan area, burrows of <i>M. imaizumii</i> were observed for the first time, but the distributions of <i>M. etigo</i> were reduced compared with those noted in the previous studies. These results suggest that <i>M. etigo</i> have disappeared in at least some regions of their previous range and/or have been displaced by <i>M. imaizumii</i>. In the eastern parts of Gosen city, the burrows of both moles were sympatrically observed. In contrast, the burrows of <i>M. etigo</i> found in the western regions were individually isolated. The isolated <i>M. etigo</i> might disappear if habitat alteration and/or competitive exclusion by <i>M. imaizumii</i> occurs.</p>

DOI： 10.11238/mammalianscience.61.29

CiNii Article

CiNii Books

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Language：Japanese   Publisher：The Ecological Society of Japan  

Insecticides are chemicals used in agriculture that may have negative impacts on human health and the survival of non-target organisms. Many amphibian species in Japan depend on paddy fields during their early development, which overlaps with rice cultivation and insecticide application to paddy fields. These early developmental stages include organ formation, when insecticide exposure could cause embryological disturbances and have serious effects on larval growth and survival. In this study, we focused on two amphibian species, the Japanese tree frog (Hyla japonica) and the Montane brown frog (Rana ornativentris) as indicator species of paddy ecosystems. We examined the toxicities of three insecticides: clothianidin (a neonictinoid), cartap (a nereistoxin), and chlorantraniliprole (a diamide). We measured larval sensitivity to these insecticides and differences in toxicity between the active ingredients and formulations. Our results indicate that exposure to cartap increased the malformation and the mortality rates in both frog species, while no teratogenicity was observed in clothianidin and chlorantraniliprole. The sensitivity to cartap differed between the two frog species; in Montane brown frogs, deformity and mortality rates occurred at higher concentrations (0.2 mg/L) than in Japanese tree frogs (0.02 mg/L). Cartap exposure caused deformities including spinal bend and spinal blisters in both species, and albinism in the Japanese tree frog. The spinal bends occurred after exposure to concentrations of 0.2 mg/L cartap in the Montane brown frogs and 0.02 mg/L cartap in Japanese tree frogs. Blisters developed after exposure to a concentration of 2 mg/L cartap in both species. Experimental treatments resulted in a greater incidence of spinal bend and a smaller incidence of spinal blisters, which occurred after exposure to the cartap formulation rather than exposure to a single active ingredient. Our results indicate that cartap has a serious impact on the early development of paddy-dwelling frogs, especially Japanese tree frogs. Spinal bends and albinism caused by cartap exposure can seriously effect larval survival and may occur at the concentrations used in standard applications of cartap in paddy fields.

DOI： 10.18960/hozen.2016

CiNii Article

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Authorship：Lead author,　Corresponding author  

DOI： 10.11238/mammalianscience.59.3

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Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

DOI： 10.2208/jscejer.70.ii_175

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Event date： 2023.9

Presentation type：Poster presentation  

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Event date： 2023.9

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Event date： 2023.8

Language：English   Presentation type：Oral presentation (general)  

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Event date： 2023.8

Language：English   Presentation type：Oral presentation (general)  

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Event date： 2015.8

Language：English   Presentation type：Poster presentation  

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Language：Japanese  

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Presentation type：Poster presentation  

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Presentation type：Oral presentation (general)  

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Presentation type：Oral presentation (general)  

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Presentation type：Oral presentation (general)  

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Presentation type：Oral presentation (general)  

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Presentation type：Oral presentation (general)  

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Presentation type：Oral presentation (general)  

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Presentation type：Oral presentation (general)  

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Presentation type：Oral presentation (general)  

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Presentation type：Poster presentation  

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Presentation type：Oral presentation (general)  

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Presentation type：Poster presentation  

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Presentation type：Poster presentation  

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Presentation type：Poster presentation  

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