Abstract
This article evaluates the effectiveness of the methods fixed area plots (AP) and point-centered quarters (PQ) to describe a woody community from typical Cerrado. We used 10 APs and 140 PQs, distributed into 5 transects. We compared the density of individuals, floristic composition, richness of families, genera, and species, and vertical and horizontal vegetation structure. The AP method was more effective to sample the density of individuals. The PQ method was more effective for characterizing species richness, vertical vegetation structure, and record of species with low abundance. The composition of families, genera, and species, as well as the species with higher importance value index in the community were similarly determined by the 2 methods. The methods compared are complementary. We suggest that the use of AP, PQ, or both methods may be aimed at the vegetation parameter under study.
Highlights
Species, and vertical and horizontal vegetation structure
We suggest that the use of area plots (AP), point-centered quarters (PQ), or both methods may be aimed at the vegetation parameter under study
Apesar do considerável número de investigações que empregaram os métodos de quadrantes (RATTER; GIFFORD, 1988; SILVA et al, 2002; COSTA et al, 2010) e de parcelas de área ixa no Cerrado, temos conhecimento de apenas um único estudo que avaliou a eiciência e as vantagens e desvantagens desses dois métodos na descrição das propriedades de uma comunidade vegetal florestal (Mata de Galeria) do Cerrado (BUENO et al, 2011)
Summary
Nós comparamos a eiciência dos métodos de parcelas (área ixa) e de quadrantes (área variável) para a determinação da riqueza e da composição de espécies e para a descrição da estrutura horizontal e vertical de uma comunidade lenhosa de Cerrado Típico. Entre as 10 espécies com maior índice de valor de importância (IVI), sete foram comuns aos dois métodos: Aspidosperma tomentosum, Byrsonima pachyphylla, Davilla elliptica, Erythroxylum suberosum, Myrcia lanuginosa, Pouteria ramilora e Qualea parvilora.
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