Portal de Periódicos da CAPES

Riqueza de espécies e composição floristica em um ambiente de duna após 50 anos de pressão antriipica: um estudo na Praia de Boa Viagem, Recife, PE - Brasil

2004; UNIVERSIDADE FEDERAL DE SANTA CATARINA; Volume: 17; Issue: 1 Linguagem: Inglês

2175-7925

Ana Virgínia Leite, Laise de Holanda Cavalcanti,

Aeolian processes and effects

The vegetation of sandy-coastal ecosystems is important to the fixing and maintenance of dunes in order to avoid the sand movement. In urban areas, however, the anthropic pressure may disrupt these ecosystems. In Recife, Brazil, we conducted a temporal analysis on changes of the dune vegetation related with the increasing anthropic pressure. Between November 1999 and May 2000, we sampled 6 km of the coastal plant community of Boa Viagem beach (8°06'02S and 34°52'48W) and compared the samples with those taken in a survey carried out by Andrade- Lima in 1951. We found 47 plant species, of which ten were halophytes, 34 were ruderals, and three were cultivated. Legurninosae and Poaceae were the richest families, and both consisted of nine species (19%). We found 18 species which were previously unknown, and ten species that no longer exist today. There are no significant differences in the species' richness and in the proportion of ruderal species between the two surveys. On the other hand, the species composition shows a significant difference. It is reasonable to suppose that the changes in floristic composition are probably a consequence of the anth-rcipic pressure, even though no significant changes were detected in the species' richness and the proportion of ruderal species.