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Impacts of hydroelectric dams on alluvial riparian plant communities in eastern Brazilian Amazonian Anais da ABC (AABC)
FERREIRA,LEANDRO VALLE; CUNHA,DENISE A.; CHAVES,PRISCILLA P.; MATOS,DARLEY C.L.; PAROLIN,PIA.
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,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon River basin; Biodiversity loss; Floodplain forest; Hydroelectric dams.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301013
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The effect of exotic grass Urochloa decumbens (Stapf) R.D.Webster (Poaceae) in the reduction of species richness and change of floristic composition of natural regeneration in the Floresta Nacional de Carajás, Brazil Anais da ABC (AABC)
FERREIRA,LEANDRO V.; PAROLIN,PIA; MATOS,DARLEY C.L.; CUNHA,DENISE A.; CHAVES,PRISCILLA P.; NECKEL,SELVINO O..
ABSTRACT The introduction of exotic species is considered as one of the major causes of biodiversity loss. The National Forest of Carajás is one of the largest mineral provinces in the world. Mining activities caused changes of the natural habitats, leaving degraded areas after the mineral exploitation. One of the mining areas within FLONA Carajás was used for the extraction of gold. In the process of exploitation, a huge depression was formed by the removal of soil which was mounded up nearby. To prevent soil erosion of these mounds, an exotic grass, Urochloa decumbens (Stapf) R.D.Webster (Poaceae) was planted. The objective of this study was to compare the impact of this non-native grass on species richness and species composition of the natural...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Exotic species; Degraded areas; Floristic; Mining.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200589
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