Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/12218
Tipo: Artigo
Título: Soil-vegetation relationships and community structure in a "terra-firme"-white-sand vegetation gradient in Viruá National Park, northern Amazon, Brazil
Autor(es): Fernandes Filho, Elpídio I.
Schafer, Carlos E.G.R.
Vasconcelos, Bruno N.F.
Mendonça, Bruno A.F. de
Mendonça, Júlia G.F. de
Abstract: Viruá National Park encompasses a vast and complex system of hydromorphic sandy soils covered largely by the white sand vegetation ("Campinarana") ecosystem. The purpose of this study was to investigate a vegetation gradient of "terra-firme"-white sand vegetation at the Viruá National Park. Nine plots representing three physiognomic units were installed for floristic and phytosociological surveys as well as to collect composite soil samples. The data were subjected to assessments of floristic diversity and similarity, phytosociological parameters and to statistical analyses, focused on principal components (PC) and canonical correspondence analysis (CCA). The vegetation of the Campinaranas types and Forest differed in biomass and species density. Ten species, endemic to Brazil, were particularly well-represented. PC and CCA indicated a clear distinction between the studied plots, based on measured soil variables, especially base sum and clay, which were the most differentiating properties between Campinarana and Forest; For the separation of the Campinarana types, the main distinguishing variable was organic matter content and cation exchange capacity. Higher similarity of Campinaranas was associated to a monodominant species and the lower similarity of Forest was related to the high occurrence of locally rare species.
Palavras-chave: Amazon
Campinarana
Canonical correlation
Monodominant species
Phytosociology
Editor: Anais da Academia Brasileira de Ciências
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.1590/0001-3765201720160666
http://www.locus.ufv.br/handle/123456789/12218
Data do documento: 2-Jan-2017
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