Impacts of hydroelectric dams on alluvial riparian plant communities in eastern Brazilian Amazonian

Anais da Academia Brasileira de Ciências

Leandro Valle Ferreira¹  Denise A. Cunha¹  Priscilla P. Chaves¹  Darley C.l. Matos¹  Pia Parolin¹ 

关键词: Amazon River basin;    biodiversity loss;    floodplain forest;    hydroelectric dams;    Amazônia;    perda de biodiversidade;    florestas inundáveis;    usinas hidrelétricas;   

DOI  :  10.1590/S0001-37652013000300012

来源: SciELO

【 摘 要 】

The major rivers of the Amazon River basin and their biota are threatened by the planned construction of large hydroelectric dams that are expected to have strong impacts on floodplain plant communities. The present study presents forest inventories from three floodplain sites colonized by alluvial riparian vegetation in the Tapajós, Xingu and Tocantins River basins in eastern Amazonian. Results indicate that tree species of the highly specialized alluvial riparian vegetation are clearly distinct among the three river basins, although they are not very distinct from each other and environmental constraints are very similar. With only 6 of 74 species occurring in all three inventories, most tree and shrub species are restricted to only one of the rivers, indicating a high degree of local distribution. Different species occupy similar environmental niches, making these fragile riparian formations highly valuable. Conservation plans must consider species complementarily when decisions are made on where to place floodplain forest conservation units to avoid the irreversible loss of unique alluvial riparian vegetation biodiversity.

【 授权许可】

CC BY   
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