2011 Fiscal Year Final Research Report
A high-resolution dynamic vegetation model based on ecological mechanisms and the vegetation patterns at the geographic-scale
Project/Area Number |
21710026
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Environmental dynamic analysis
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Research Institution | Japan Agency for Marine-Earth Science and Technology |
Principal Investigator |
ISHII Reiichiro 独立行政法人海洋研究開発機構, 地球環境変動領域, 研究員 (40390710)
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Project Period (FY) |
2009 – 2011
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Keywords | 植生変動モデル / 地形スケール / 生態学的プロセス / 衛星画像解析 |
Research Abstract |
A fine-scale vegetation transition model was developed based on the observation data from Mongolia, where slope aspect-dependent and discontinuous vegetation transition pattern is widely observed. The dynamics of plants' biomass and soil water content(SWC) with biological interactions are calculated in the meshed target space(res=90m). The"facilitation effect"among plants over soil water amplified the difference in SWC caused by the topography and was the key to generate the observed discontinuous vegetation pattern. By adding the herbivory effect with feasible parameters to this model, we could show the possible future projections for vegetation change under various scenarios with changing climate and livestock density. It tells that drastic and irreversible vegetation degradation, deforestation might occur at some critical point of decrease of precipitation and/or increase in livestock.
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[Journal Article] Variation in nitrogen isotopic composition in the Selenga river watershed2011
Author(s)
Hyodo, F., Nishikawa, J., Kohzu, A., Fujita, N., Saizen, I., Tsogtbaatar, Javzan, C., Enkhtuya, M., Gantomor, D., Amartuvshin, N., Ishii, R. & Wada, E.
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Journal Title
DOI
Peer Reviewed
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