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Conseqüências ecológicas da fragmentação florestal na Amazônia

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dc.contributor.author Laurance, William F. en
dc.contributor.author Vasconcelos, Heraldo L. en
dc.date.accessioned 2011-02-09T20:04:54Z
dc.date.available 2011-02-09T20:04:54Z
dc.date.issued 2009
dc.identifier.citation Laurance, William F. and Vasconcelos, Heraldo L. 2009. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F12013">Conseqüências ecológicas da fragmentação florestal na Amazônia</a>." <em>Oecologia Brasiliensis</em>. 13 (3):434&ndash;451. <a href="https://doi.org/10.4257/oeco.2009.1303.03">https://doi.org/10.4257/oeco.2009.1303.03</a> en
dc.identifier.uri http://hdl.handle.net/10088/12013
dc.description.abstract Many studies have analyzed the ecological consequences of forest fragmentation on Amazonian forests and the results of these studies are summarized here. Habitat fragmentation has extensive effects on Amazon rainforests, affecting diversity and community composition in the resulting fragments, and also affecting ecological processes like pollination, nutrient cycling, and carbon fixation. The ecological changes resulting from fragmentation are generally of inverse proportional magnitude to the size of the fragment area. Consequently, smaller fragments are usually less species-rich and have fewer species per area than do larger forest fragments. Forest fragments in the Amazon seem to be particularly prone to edge effects. Fragmentation dramatically increases edges of tropical forests: new edges are artificial and abrupt, forming a stark boundary between the forest and the surrounding, altered landscape. One of the most striking effects is a dramatic increase in the mortality of trees, leading to increased canopy-gap formation. Edge effects in the fragments also alter physical gradients and species abundances. In general, species that are most vulnerable to fragmentation tend to respond negatively to edges, have large area requirements, and/or are intolerant to the surrounding matrix (i.e. the mosaic of modified habitats around the fragments), whereas species that are resilient to fragmentation usually have an opposite set of characteristics. en
dc.relation.ispartof Oecologia Brasiliensis en
dc.title Conseqüências ecológicas da fragmentação florestal na Amazônia en
dc.type Journal Article en
dc.identifier.srbnumber 80028
dc.identifier.doi 10.4257/oeco.2009.1303.03
rft.jtitle Oecologia Brasiliensis
rft.volume 13
rft.issue 3
rft.spage 434
rft.epage 451
dc.description.SIUnit BDFFP en
dc.description.SIUnit Encyclopedia of Life en
dc.description.SIUnit forces of Change en
dc.description.SIUnit STRI en
dc.citation.spage 434
dc.citation.epage 451


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