Potential Effects of Ongoing and Proposed Hydropower Development on Terrestrial Biological Diversity in the Indian Himalaya
Pandit, Maharaj K.1,2; Grumbine, R. Edward3
2012-12-01
发表期刊CONSERVATION BIOLOGY
ISSN0888-8892
卷号26期号:6页码:1061-1071
摘要Indian Himalayan basins are earmarked for widespread dam building, but aggregate effects of these dams on terrestrial ecosystems are unknown. We mapped distribution of 292 dams (under construction and proposed) and projected effects of these dams on terrestrial ecosystems under different scenarios of land-cover loss. We analyzed land-cover data of the Himalayan valleys, where dams are located. We estimated dam density on fifth-through seventh-order rivers and compared these estimates with current global figures. We used a species-area relation model (SAR) to predict short-and long-term species extinctions driven by deforestation. We used scatter plots and correlation studies to analyze distribution patterns of species and dams and to reveal potential overlap between species-rich areas and dam sites. We investigated effects of disturbance on community structure of undisturbed forests. Nearly 90% of Indian Himalayan valleys would be affected by dam building and 27% of these dams would affect dense forests. Our model projected that 54,117 ha of forests would be submerged and 114,361 ha would be damaged by dam-related activities. A dam density of 0.3247/1000 km(2) would be nearly 62 times greater than current average global figures; the average of 1 dam for every 32 km of river channel would be 1.5 times higher than figures reported for U. S. rivers. Our results show that most dams would be located in species-rich areas of the Himalaya. The SAR model projected that by 2025, deforestation due to dam building would likely result in extinction of 22 angiosperm and 7 vertebrate taxa. Disturbance due to dam building would likely reduce tree species richness by 35%, tree density by 42%, and tree basal cover by 30% in dense forests. These results, combined with relatively weak national environmental impact assessment and implementation, point toward significant loss of species if all proposed dams in the Indian Himalaya are constructed.
关键词Dams Land-cover Change Land-use Change Species Extinction Species Richness
资助信息University Scholars Programme, National University of Singapore [R-377-000-035-112]; Chinese Academy of Sciences [2010T1S2]; CGIAR/CRP5 Land, Water and Ecosystems Program
收录类别SCI
语种英语
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/15986
专题资源植物与生物技术所级重点实验室
作者单位1.Univ Delhi, Dept Environm Studies, Ctr Interdisciplinary Studies Mt & Hill Environm, Delhi 110007, India
2.Natl Univ Singapore, Univ Scholars Programme, Singapore 138593, Singapore
3.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China
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Pandit, Maharaj K.,Grumbine, R. Edward. Potential Effects of Ongoing and Proposed Hydropower Development on Terrestrial Biological Diversity in the Indian Himalaya[J]. CONSERVATION BIOLOGY,2012,26(6):1061-1071.
APA Pandit, Maharaj K.,&Grumbine, R. Edward.(2012).Potential Effects of Ongoing and Proposed Hydropower Development on Terrestrial Biological Diversity in the Indian Himalaya.CONSERVATION BIOLOGY,26(6),1061-1071.
MLA Pandit, Maharaj K.,et al."Potential Effects of Ongoing and Proposed Hydropower Development on Terrestrial Biological Diversity in the Indian Himalaya".CONSERVATION BIOLOGY 26.6(2012):1061-1071.
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