記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Korean Society for Atmospheric Environment  

Particulate matter deposited on leaf surfaces may cause erosion/abrasion of epicuticular wax and the malfunction of stomata. However, the deposition processes of particulate matter, such as elemental carbon (EC), has not been studied sufficiently in Asian forest ecosystems. Deposition processes for particulate SO4 2- and EC were studied in a Japanese cedar forest in Kajikawa, Niigata Prefecture, Japan, and in a dry evergreen forest and a dry deciduous forest in Sakaerat, Nakhon Ratchasima province, Thailand. The SO4 2- fluxes attributed to rainfall outside the forest canopy (RF), throughfall (TF), and stemflow (SF) showed distinct seasonalities at both sites, increasing from November to February at the Kajikawa site and in March/April at the Sakaerat site. Seasonal west/ northwest winds in winter may transport sulfur compounds across the Sea of Japan to the Kajikawa site. At the Sakaerat site, pollutants suspended in the air or dry deposits from the dry season might have been washed away by the first precipitations of the wet season. The EC fluxes from RF and TF showed similar variations by season at the Kajikawa site, while the flux from TF was frequently lower than that from RF at the Sakaerat site. Particulate matter strongly adsorbed onto leaf surfaces is not washed away by rainfall and contributes to the EC flux. At the Kajikawa site, Japanese cedar leaf surfaces accumulated the highest levels of particulate matter and could not be neglected when calculating the total flux. When such leaf-surface particles were considered, the contribution of dry deposition to the total EC flux was estimated to be 67%, 77%, and 82% at the Kajikawa site, and at the evergreen and deciduous forests of the Sakaerat site, respectively. Leaf-surface particles must be included when evaluating the dry and total fluxes of particulate matter, in particular for waterinsoluble constituents such as EC.

DOI： 10.5572/ajae.2012.6.4.246

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3838/jjo.60.178

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Japan Society for Environmental Chemistry  

From April to November in 2008, we observed altitudinal and seasonal changes in the monthly mean ozone concentrations using passive samplers at two mountains in Niigata Prefecture: Mt. Bunagahira on Sado Island and Mt. Hakkai, located on the mainland. The mean ozone concentrations at both mountains were the highest in spring (May), and decreased in summer. The ozone concentrations at Mt. Bunagahira increased in autumn again. Such a seasonal change in the mean ozone concentrations was the same pattern observed at other mountains in central Japan as well as plains in western part of Japan. The monthly mean ozone concentrations increased with the altitude at Mt. Hakkai. Such an altitudinal change in ozone concentrations was the similar pattern observed at other mountains in central Japan. In contrast, the mean ozone concentrations of each month showed similar values at all altitudes on each slope side of Mt. Bunagahira showing a different tendency with other mountains observed in Japan. This phenomenon might be resulted from few local origins of air pollutants around Mt. Bunagahira that generate or decompose ozone. The mean ozone concentrations on the slope of Mt. Bunagahira facing northwest were higher than those facing southeast in every month. This phenomenon might suggest that the mean ozone concentrations transported from the direction of East Asian continent were higher than those of the mainland in Niigata Prefecture.

DOI： 10.5985/jec.21.237

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：The Japanese Society of Irrigation, Drainage and Rural Engineering  

新潟県佐渡島の耕作放棄棚田において，地下水の水位および水質の経時変化に影響を及ぼす要因を調査した．山腹斜面末端部近くに位置し，上方が急斜面になっている調査区（A区）では，緩傾斜の平衡斜面の中腹に位置する調査区（B区）に比べて，地下水位の経時的な変動が小さかった．A区ではEC，pHおよび鉱物風化に関わる成分濃度（Na⁺，Ca²⁺，アルカリ度など）が高く，斜面浸透水が地下水の主要な供給源になっていると推察された．B区では海塩成分（Na⁺，Cl^-など）の影響が冬期の濃度上昇に強く現れていた．地下水質の変化には，そのほかに降雨による地下水の希釈，イオウの酸化還元，植物の養分吸収なども影響していると推察された．近接する場所でも地形条件が違うと，地下水質に及ぼす各要因の影響の仕方が異なり，地下水位や地下水質などの水環境特性を考慮した耕作放棄棚田の管理が重要である．

DOI： 10.11408/jsidre.79.169

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その他リンク： https://jlc.jst.go.jp/DN/JALC/10005812522?from=CiNii

記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3838/jjo.60.63

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.2750/arp.29.454

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER HEIDELBERG  

We investigated the soil and soil water chemistry in abandoned terraced paddy fields (reed stand) and a thicket of deciduous broad-leaved trees (thicket stand) on the same slope in Sado Island, Japan. The soils gathered from these plots were incubated under different water conditions to examine the dynamics of dissolved ions. The organic carbon pool in the soil in the reed stand at the lower slope position was greater than the thicket stand at the middle slope position. The high concentration of base cations and an almost neutral pH of the soil water at the reed stand corresponded with the high exchangeable cation concentrations and base saturation in the soil. These results reflect the mineral-rich groundwater percolating down the slope, which may be produced by chemical weathering. An in situ sulfate reduction in the reed stand at deeper soil horizons was identified. The different water conditions in the incubated soils affected the soil pH(H(2)O), transformation of Fe, and dominant anions (NO(3) (-), HCO(3) (-), and SO(4) (2-)). These biogeochemical processes were more conspicuous in the reed stand at the lower slope position where the concentrations of organic matter and base cations were high. When the abandoned terraced paddy field is developed for the conservation of the Japanese crested ibis (Nipponia nippon) habitat in Sado Island, the reductive subsoil at the lower slope position should be kept waterlogged to limit sulfuric acid generation.

DOI： 10.1007/s10333-009-0191-9

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER  

pH monitoring data for public water bodies in Niigata and Gifu prefectures in central Japan were tested by the nonparametric seasonal Mann-Kendall method to evaluate long-term acidification. A significant long-term declining trend in river water pH was found in several watersheds in Niigata and Gifu prefectures. In Niigata, the declining trend was observed only in areas receiving drainage from granitic rocks, and the acid neutralizing capacity of the river waters was in fact low in those areas. In Gifu, a declining trend was observed in some remote watersheds, where there was no clear relationship between the geology and the long-term trends. Since Niigata and Gifu receive the highest level of acid loading from the atmosphere in Japan, river water acidification in several watersheds may be attributable to the effects of the acid deposition. Other factors, such as hot spring drainage, changes in land use, and natural sea salt deposition, cannot adequately explain the acidification phenomena observed in this study.

DOI： 10.1007/s11270-008-9909-3

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：植生学会  

&nbsp;&nbsp;1. これまで研究事例のなかった,標高的な森林限界に達していない山岳の亜高山帯針葉樹林域に高山性植物群落が成立している要因を明らかにするため,長野県黒姫山のカルデラ内壁の岩塊斜面下部において,植物群落の特性,立地・気象要因について調査した.<BR>&nbsp;&nbsp;2. TWINSPANの解析によって区分された各群落は,斜面下部から上部へ向かって順に,チシマザサ群落,コメバツガザクラ-ミネズオウ群集,コケモモ-ハイマツ群集,アカミノイヌツゲ-クロベ群集(オオシラビソ群集のコメツガ亜群集),オオシラビソ群集に相当すると考えられた.<BR>&nbsp;&nbsp;3. 黒姫山の岩塊斜面は最終氷期の中期ころ形成され,天狗の露地に成立している高山性植物群落(コメバツガザクラ-ミネズオウ群集)は,そのころに分布していた極地性植物群落に由来すると考えられた.<BR>&nbsp;&nbsp;4. 高山性植物群落の成立に対して積雪が影響を及ぼしているとは考えられなかったが,風穴から吹き出す冷気は高山性植物の繁殖や生存に影響を及ぼしている可能性が考えられた.<BR>&nbsp;&nbsp;5. 天狗の露地には高木性樹種の種子が供給されていたが,岩塊上では土壌の発達がきわめて悪く,薄い植物腐植しか堆積していないため,定着した高木性樹種はその生育が著しく抑制されていた.<BR>&nbsp;&nbsp;6. 本調査地の高山性植物群落に侵入し,その生育地を縮小させるパイオニア的役割を果たしている樹種は,ハイマツと低木状のコメツガであった.<BR>&nbsp;&nbsp;7. 本調査地の岩塊斜面上での植物群落の変遷は,高山性植物群落からコメツガ群落,オオシラビソ群落へと進んでいったと考えられ,岩塊斜面に侵入した植物によるリターの供給と有機物層の堆積が重要な役割を果たしていた.<BR>&nbsp;&nbsp;8. 岩塊斜面の下部に位置する天狗の露地では,粗大な岩塊の影響で土壌の発達が妨げられているために高木性樹種が定着しにくく,高山性植物群落が遺存できたと考えられた.

DOI： 10.15031/vegsci.26.21

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人日本森林学会  

耕作放棄後約40年が経過し,現在は森林になっている新潟県佐渡島の中山間地にある放棄棚田において,森林の成立に関わる要因を調査した。本調査地では,コナラやクリを主とした樹木の侵入が棚田の放棄前後から始まり,その後20年くらいの間に徐々に進んでいた。放棄棚田における森林の成立には,斜面位置による地下水位と,棚田面・畦・法面といった微地形による土壌の水分環境が強く影響していた。斜面上側では地下水位が低いために土壌含水率が高くなく,棚田面・畦・法面にともに樹木が生育していた。しかし,斜面下側ほど地下水位が高いために棚田面の土壌含水率が高く,樹木は過湿な土壌環境が緩和された畦や法面におもに生育し,それらによって林冠が閉鎖されていた。法面では傾斜が土壌含水率や樹木の生育に影響を与えていた。棚田の微地形間での樹種分布の違いには,種子の散布様式や土壌の水分環境に対する生理的な耐性も関係していると考えられた。

DOI： 10.4005/jjfs.90.364

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER  

Fluxes of major ions in rainfall (RF), throughfall plus stemflow (TF + SF), and stream water (SW) were measured for five water years in a small catchment of a Japanese cedar forest near the Sea of Japan. The fluxes of most ions in RF and in TF + SF, including the non-sea-salt constituents, increased from late autumn to midwinter owing to the seasonal westerly wind. The concentrations of most ions in SW showed no obvious seasonal trend during the study period, whereas NO(3)(-) concentrations were lowest in summer, with a small seasonality. The Ca(2+) and Mg(2+) outputs in SW were approximately 3.7 and 1.8 times the TF + SF inputs of these cations, respectively. The large net outputs of base cations in the catchment may indicate a decrease in the soil&apos;s acid-neutralizing capacity. Annual dissolved inorganic nitrogen inputs in RF and in TF + SF were 17.7 and 17.9 kg N ha(-1) year(-1), respectively, which exceeded previously published thresholds in Europe and the U. S. (i.e., the values at which these inputs increased NO(3)(-) levels in SW) and equaled the highest level of nitrogen deposition previously reported in Japan. The NO(3)(-) concentrations in SW were relatively high even in summer. During high-precipitation events, NO(3)(-) concentrations in SW increased with increasing water discharge, and the pH decreased simultaneously during several events. Nitrogen deposition may contribute to the high NO(3)(-) concentrations in SW and the temporary acidification that occurred during the rain events.

DOI： 10.1007/s11270-008-9726-8

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本海岸林学会  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本植生史学会  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCI LTD  

The seasonal changes in throughfall (TF) and stemflow (SF) chemistry and the canopy interactions of K+ and N compounds were studied in a Japanese cedar forest near the Sea of Japan. The fluxes of most ions, including non-sea-salt SO42-, from TF, SF, and rainfall showed distinct seasonal trends, increasing from autumn to winter, owing to the seasonal west wind, while the fluxes of NH4+ and K+ ions from TF + SF might have a large effect of canopy interactions. The contact angle (CA) of water droplets on leaves decreased with leaf aging, suggesting that surface wettability increases with leaf age. The K+ concentration in TF was negatively correlated with the CA of 1-year-old leaves, while the NH4+ concentration was positively correlated with the CA. The net fluxes of NH4+ and NO3- from TF were positively correlated with the CA. The increase in wettability may accelerate leaching of K+ or uptake of NH4+, (c) 2007 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.envpol.2007.06.023

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：TERRA SCIENTIFIC PUBL CO  

At least 300 tons of subrounded to well-rounded wood blocks emerged onto the seafloor at a water depth of 70-100 m during the 2007 M(w) 6.6 Chuetsu-oki, central Japan, earthquake. Radiocarbon dating and taxonomic identification of eight of those wood blocks suggest that they were transported from inland during the middle to late Holocene, buried by Subsequent sedimentation, and brought up onto the seafloor in 2007, most likely by submarine liquefaction induced by strong shaking. In particular, all eight blocks gave ages older than 2500 cal yr BP, implying the possibility that the 2007 earthquake was the first earthquake during the last two millennia to have caused shaking strong enough to induce submarine liquefaction in the 2007 meizoseismal area. However, we cannot rule out the possibility of multiple large earthquakes after approximately 2 ka, if the buried wood sources cannot be emptied by a single earthquake. Further studies are required to examine paleoseismic implications of the emergence of these wood blocks in 2007.

DOI： 10.1186/BF03353152

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：植生学会  

&nbsp;&nbsp;1. 本研究は新潟県佐渡島の棚田放棄地において,さまざまな植物群落が成立している原因を,土壌,地下水,地形などの環境要因との関連から明らかにすることを目的とした.<BR>&nbsp;&nbsp;2. 18ヵ所に調査プロットを設定し,植生,土壌,地下水位の調査を行うとともに,土壌と水のサンプルを採取し,化学性の分析を行った.<BR>&nbsp;&nbsp;3. 本調査地の植物群落は,優占種の生育形や樹高,草本植物の種組成により,中生高木林,湿生高木林,中生低木林,湿生低木林,ヨシ群落の5タイプに分けられた.<BR>&nbsp;&nbsp;4. 調査したすべての土壌断面で,棚田として利用していたころの作土層と心土層を確認でき,作土層の上部には,腐植を多く含んだ黒色層が形成されていた.<BR>&nbsp;&nbsp;5. 平均地下水位は中生高木林と中生低木林で低く,逆に湿生高木林と湿生低木林,ヨシ群落で高く,両者の違いが明瞭だった.<BR>&nbsp;&nbsp;6. 多くの土壌断面中にグライ層が存在し,その現れる深さは平均地下水位と強い相関を示した.<BR>&nbsp;&nbsp;7. ヨシ群落では土壌表層に堆積した泥炭の影響で,他の群落タイプよりもC,N含有率が高かった.また,ヨシ群落と中生および湿生低木林では,中生および湿生高木林よりも土壌中のCaが多く,pHが高かった.<BR>&nbsp;&nbsp;8. 斜面下部に位置するヨシ群落と湿生低木林では,斜面浸出水が地下水のおもな供給源と考えられ,中生および湿生高木林よりも地下水位の経時変動が小さく,各成分の含有率とpHが高かった.<BR>&nbsp;&nbsp;9. 林床植生のデータを用いたDCAによる第I軸上でのプロットの配列は,平均地下水位,土壌,地下水の多くの化学性との間で有意な相関を示し,地下水位の高さに起因した土壌の水分環境傾度に沿った空間的な植生構造の変化を反映していると考えられた.<BR>&nbsp;&nbsp;10. 棚田放棄後の植生遷移においては,畦および棚田間の法面の存在と周囲の植生の影響が大きく,高木林では,その内部を被陰することで林床植生の組成や優占度に影響を及ぼしていた.<BR>&nbsp;&nbsp;11. 棚田放棄後は斜面位置や傾斜といった地形条件の違いが地下水位の高さやその変動パターンを通じて異なる植物群落を成立させ,さらに土壌や地下水の化学性にも影響を及ぼしていると考えられた.

DOI： 10.15031/vegsci.23.37

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：SPRINGER  

Arbuscular mycorrhizas (AM) are the most widespread mycorrhiza in nature and form two morphologies, Arum- and Paris-type. The determining factors defining the two different morphologies are not well understood. In this study, the distribution of Arum- and Paris-type AM was determined in a mixed pine forest. A total of 35 plant species belonging to 20 families and 32 genera were identified and examined for AM colonization and morphological types. AM morphological types in 14 families were confirmed as follows: Arum-type in Rosaceae, Oleaceae, Lauraceae, Vitaceae and Compositae, Paris-type in Aquifoliaceae, Ulmaceae, Araliaceae, Theaceae, Magnoliaceae, Rubiaceae and Dioscoraceae, and both and/or intermediate types in Caprifoliaceae and Gramineae. Plant families whose AM morphological status was previously unknown were clarified as follows: Polygonaceae and Commelinaceae showed Arum-type morphology; Celastraceae, Menispermaceae and Elaeagnaceae had typical Paris-type morphology. The proportion of Arum-type to Paris-type species decreased in the following order: annuals &gt; perennials &gt; deciduous species &gt; evergreen species, and pioneer group &gt; early successional group &gt; late successional group. Evergreen plants had a higher tendency to form Paris-type AM than annuals, perennials and deciduous plants. The results indicate that environmental changes, such as shade during plant succession, control the distribution of plant growth forms in mixed pine forest and may also play a part in the distribution of Arum- and Paris-type morphology. The identity of the plant seems to strongly influence AM morphology, though control by the fungal genome cannot be ruled out.

DOI： 10.1007/s00572-004-0310-9

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

A survey of soils and trees was conducted on Syunkunitai coastal sand dune in eastern Hokkaido to clarify the relationships between the soil properties and the plant cover type. A belt transect of 360 m in length was established across the dune.Three community types, that is, a Picea glehnii forest, an Abies sachalinensis forest, and a salt marsh were recognized. Soil types at the study area were determined to be sandy immature soil and peat soil. Their horizon sequences were described as A0-V-C or T-V-C layers (A0, T, V, and C indicate layers of leaf litter, peat, volcanic deposit, and parent material, respectively). The Abies sachalinensis forest was characterized by a relatively high calcium concentration in the surface soil layer and a tendency for podzolization in the volcanic deposit layer. The Picea glehnii forest was characterized by peat accumulation because of the high ground water table, volcanic deposits in the soil profile, and the strong influence of sea salt on the soil chemistry. The roots in the Picea glehnii forest were distributed more shallowly than those in the Abies sachalinensis forest, thus avoiding the high water table level as well as the influence of seawater in the soil. The salt marsh showed an extremely high sodium concentration and base saturation, indicating that this area was directly affected by seawater. Recently, the periphery of the Picea glehnii forest on Syunkunitai sand dune has been declining because of seawater inundation caused by ground subsidence.

DOI： 10.1111/j.1440-1703.2004.00674.x

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Society of Wetland Scientists  

In Far East Asia, coastal dune forests dominated by the conifer Picea glehnii represent a rare plant community type. A P. glehnii forest and adjacent plant communities on the dunes of the Syunkunitai sand spit, Hokkaido, northern Japan were examined. Using the basal area of P. glehnii and Abies sachalinensis stems measured in a belt transect across a portion of the sand spit, we identified three plant community zones: SALT MARSH, PICEA, and ABIES. The three zones were distributed along a topographic gradient that was associated with differences in water table depth, salinity, and pH of soil pore water. Nearly pure stands of P. glehnii grew on a relatively level portion of the sand dune where the ground-water-table level was shallow (-10.9 to -26.3 cm, without isolated depressions). The salinity of the soil pore water was significantly lower than that in the adjacent salt marsh (Dunnett's T3, P = 0.047). The A. sachalinensis community grew on the upper slope and ridge of the dune where the ground-water-table was significantly lower (P = 0.003) than in the P. glehnii forest. Our results show that the boundary between the P. glehnii forest and the salt marsh community is determined primarily by the salinity of the soil pore water, whereas the boundary between the P. glehnii and A. sachalinensis forests is determined by the ground-water-table depth and the pH of the soil pore water. Because of continual ground subsidence, the salt marsh community and P. glehnii forest will likely be submerged within 50 and 100 years, respectively.

DOI： 10.1672/0277-5212(2003)023[0406:SSOPGF]2.0.CO;2

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.11519/jjfs1953.83.2_84

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記述言語：日本語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：新潟大学  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：日本森林学会  

森林地域における渓流水質の広域比較は, 環境変化による森林生態系への影響把握に重要な情報となる。全国大学演習林において,1998年6月の1カ月間, 渓流水の水質調査を実施した。調査した渓流数は45カ所である。pHは, 平均で7.1 (最大8.1,最小6.1) とほぼ中性であった。電気伝導度 (EC) は, 平均で64 (最大178, 最小19) μS/cmであり, 沖縄•佐渡という島部で海塩のためECが大きかった。島部を除いたECは, pH, 陽イオンの当量合計およびアルカリ度 (主にHCO<SUB>3</SUB><SUP>-</SUP>) と正の相関がみられた。これは, 炭酸風化による陽イオンの放出の多い渓流ではECが大きく, プロトン (H<SUP>+</SUP>) を消費するためpHも高いことを示唆している。NO<SUB>3</SUB><SUP>-</SUP>濃度は, 関東山地の調査渓流で高かった。群馬県の調査渓流では, NO<SUB>3</SUB><SUP>-</SUP>とCa2<SUP>+</SUP>濃度に強い正の相関がみられ, 土壌の表層において硝化作用で生成したH<SUP>+</SUP>による交換性Ca2<SUP>+</SUP>の溶出が示唆された。

DOI： 10.11519/jjfs1953.82.3_308

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その他リンク： http://hdl.handle.net/10097/46833

記述言語：日本語   掲載種別：研究論文（その他学術会議資料等）  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：新潟大学  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

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記述言語：日本語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：新潟大学  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.11519/jjfs1953.76.5_468

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：一般社団法人 日本生態学会  

Altitudinal changes in vegetation and soils were studied on Mt. Dairoku (1459.5m altitude), central Hokkaido, Japan. Three altitudinal vegetation types were recognized on the basis of vegetation similarity and species composition : 1) Pinus pumila scrub, distributed at altitudes exceeding 1250m, which was considered to have formed due to edaphic conditions. 2) Subalpine mixed forest, distributed at altitudes between 700m and 1250m, consisting mainly of Picea jezoensis, Abies sachalinensis and Betula ermanii. 3) Cool temperate mixed forest, distributed at altitudes lower than 700m, consisting of Abies sachalinensis, Picea jezoensis, Betula ermanii and many cool temperate deciduous tree species. Main soil types of the Pinus pumila scrub and subalpine mixed forest were black soil and light-colored black soil. These soils were considered to be paleosols, although their surface horizons showed a tendency for weak podzolization. Brown forest soil corresponded well with the cool temperate mixed forest. Synthetic indices of habitat fertility were provided using the soil chemical properties of horizons A_0 and A, which showed a tendency to become reduced gradually at higher altitudes. Soil chemical properties of horizon A_0 showed clear differences between the three vegetation types, whereas those of horizon A showed a difference between black soil and brown forest soil groups. A close correlation between vegetation and soils was recognized.

DOI： 10.18960/seitai.44.1_33

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記述言語：英語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：新潟大学  

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記述言語：日本語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：新潟大学  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：英語   掲載種別：研究論文（大学，研究機関等紀要）   出版者・発行元：新潟大学  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：森林立地学会  

In order to clarify the effect of acid rain on the forest soil, that is, the relationship between acidneutralizing capacity of soil and aluminum ion concentration in the soil solution, artificial acid rains such as pH 4.0, 3.5, 3.0, and 2.0 solutions regulated by sulfuric acid and deionized water as a control were added to the column filled with brown forest soil derived from granite which is one of the most popular forest soils in Japan. The results obtained are as follows; 1) When buffer actions by exchangeable cations and ammonium ion derived from the chemical decomposition of nitrogenous organic matter are not enough to prevent acidification of soil by acid rain because the base saturation of the soil is very low, bases are also dissolved from minerals in soil even at the beginning stage of experiment where the soil pH is not so declined. 2) When pH value of soil solution is maintained at the same level as that of the original soil or within the lowering of 0.4 unit from pH value of the original soil through those buffer actins, exchangeable aluminum ion is only released a little. 3) When pH value of soil solutionbecomes 0.5 unit lower than that of the original soil, a consederable amount of aluminum ion is leached out from the column due to the release from the adsorption complex of soil and the dissolution of aluminum compound. 4) When pH value of soil solution becomes 1.0 unit lower than that of the original soil, the breakdown of minerals in soil begins and a lot of aluminum ion and bases are leached out from the column.

DOI： 10.18922/jjfe.33.2_65

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：日本語   掲載種別：研究論文（大学，研究機関等紀要）  

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Characteristics of vegetation and soils in the serpentine area of northern Hokkaido were studied in comparison with non-serpentine areas of the same region, and with other serpentine areas of Japan and elsewhere in the world. The relationship between vegetation and soils is discussed. Although forest vegetation of northern Hokkaido is generally represented by deciduous forest, coniferous forest, predominantly Picea glehnii, develops in the serpentine area. Deciduous trees are limited both in number and in size. Forest floor is densely covered with Sasa kurilensis. The shrub layer is also well developed, whereas the herb layer is poor but contains characteristic species. Soils developing in the serpentine area are determined as Podzol (Wet Iron Podzol), while Brown Forest Soil is commonly found in the non-serpentine areas of the region. The serpentine soils are shallow and moist, showing general morphology and chemistry of podzolic soil in upper horizons of the profile. In lower horizons, however, physico-chemical properties are strongly affected by the parent rock. In comparison with other serpentine areas of Japan and elsewhere, northern Hokkaido is unique in that the vegetation is represented by a relatively closed forest of fair-sized trees, and the soils by a podzol. Such Picea glehnii forests and podzolic soils are considered an intrazonal phytogeocoenosis strongly affected by serpentine substrate. In this regard, the cool and humid climate as well as undulating relief of northern Hokkaido are also important factors for the development of the unique phytogeocoenosis. © 1987.

DOI： 10.1016/0378-1127(87)90084-3

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記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：森林立地学会  

DOI： 10.18922/jjfe.28.2_37

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

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記述言語：日本語   会議種別：ポスター発表  

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記述言語：日本語   会議種別：ポスター発表  

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記述言語：日本語   会議種別：ポスター発表  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：ポスター発表  

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記述言語：日本語   会議種別：ポスター発表  

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記述言語：日本語   会議種別：ポスター発表  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：ポスター発表  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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記述言語：日本語   会議種別：口頭発表（一般）  

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