Distribuição espacial de bromélias na restinga de Jurubatiba, Macaé, RJ

Abstract

In “restingas”, because favorable microhabitats have patchy distribution, and due to the high vegetative reproduction rate in bromeliads, we tested the hypothesis lhat the pattem of spatial distribution of bromeliads in a “restinga” habitat would be aggregated. We used the “restinga” of the Parque Nacional da Restinga de Jurubatiba as our hypothesis test area. We analyzed the spatial distribution pattem of each studied species using Morisita dispersion Index (Id). We found 10 bromeliad species, with 10179 individuais in the 0,98 ha sampled. In the study area, nine species had an aggregated distribution pattem (Id > 1). We suggest that the aggregated distribution pattem of bromeliads may be explained by the rate of vegetative reproduction, distribution of the favorable abiotic conditions and availability substrates in clumps, which occur in patches in the study are a, favoring the bromeliads occurrence.