Spatial distribution of Syagrus romanzoffiana (Cham.) Glassman individuals in fragment of Atlantic rain forest, São Luis do Paraitinga SP, Brazil. / Distribuição espacial de indivíduos de Syagrus romanzoffiana (Cham.) Glassman em fragmento florestal da Mata Atlântica, São Luiz do Paraitinga-SP

AUTOR(ES)

Vanessa Neves Ferreira

FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

11/04/2007

RESUMO

The present survey was carried out in a forest fragment of the Atlantic rain forest in Sao Luiz de Paraitinga SP, Brazil. The goal was to study the Syagrus romanzoffiana palm population structure, if the spatial pattern varies in different developmental stages between the border and the interior of the fragment, and if the average distance of individuals varies between these areas. Two 200x25m parallel transects were allocated, one along the border contours and the other in the interior of the fragment, at a distance of 50 m one from the other. To identify the distribution of seedling and juveniles in relation to adults, in each transect, were allocated 100m circular plots with one adult individual considered as the central adult. In border transect 8 plots were sampled and in the interior transect only 6 plots were sampled. The population had higher seedling predominance in the border (88.5%) than in the interior (62.9%). The results of the Index of Morisita indicated that the spatial pattern of the population in the border and the interior was aggregate (Id = 1.33 and Id = 1.61, respectively). The average distance between the central adult and the population was higher in the border transects (361cm) than in the interior transects (383). The same was observed for the average distance between other adults and juveniles that is, they were closer to each other in the border transects (328cm) than in the interior transects (372cm).

ASSUNTO(S)

fisiologia florestal arecaceae distribuição espacial fragmentação florestal aracaceae edge effects spatial distribution forest fragmentation efeito-borda

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