| Popis: |
The constant interference of human activities has had direct and indirect impacts on aquatic environments with consequences for water quality for aquatic biota and the functioning of ecosystems, thereby reducing the ability to use. This study aimed to describe the qualitative and quantitative variation of species of macroalgae from Praia do Pina, Recife-PE, in the rainy season and drought. The collections were made in August 2007 (rainy season) and January 2008 (period of drought). Data on the occurrence of macroalgae were collected by snorkeling using the combined techniques of sampling belt transects (50m x 1m) and quadrats (1m x1m). The species of greatest abundance in both periods were almost the same: Ulva lactuca, U. fasciata, U. intestinalis, Caulerpa sertularioides, C. filiformis; C.prolifera; C.racemosa, and C. lentillifera; being found in smaller quantities: Pterocladia capillaceous, Hypnea musciformis, H. pannosa, H. cervicornis, Sargassum Muticum, S. vulgare, S. ilicifolium, Padin Pavoni, P. tetrastromatica, Dictyota dichotoma, Gracilaria warts and G. Salicornia. The two species were only found in Glacilaria period of drought and the species S. ilicifolium was found during the rainy season. About 80% of macroalgal distribution in reef studied is composed of individuals belonging to the phylum Chlorophyta, 12% are representatives of the phylum Phaeophyta and 8% are belonging to the phylum Rodhophyta. These percentages are very close to the values presented in two urban beaches in the Metropolitan Region of Recife and a beach on the northern coast of the state of Pernambuco, where areas have been intensified the processes of human occupation and exploitation, and increasing industrialization. The predominance of species of Chlorophyta may represent a greater tolerance to the flora of the pollutants. |
