Análise interanual da assembleia de peixes estuarinos após impacto de construção de obra rodoviária no Litoral Sul do Brasil

Abstract

Transitional water ecosystems suffer from the destruction and loss of biodiversity. Fish assemblages were described in taxonomic and functional metrics and temporal variations were investigated over time, during and after an intervention in the cove of Saco dos Limões, south coast of Brazil. Sampling was performed using bottom trawling. In the temporal analysis of the ichthyofauna, we used multidimensional ordering and similarity analysis were used, based on the presence and absence of species, families and abundance of species and guilds. Were identified 78 species and 33 families. The most abundant species was Genidens genidens (25.9%) and Sciaenidae, with 16.7% of the total identified species, was the family with the highest richness (13 spp). Visiting marine species was the most representative guild in the estuary (44.1%) and zoobentivores was the food guild with the largest number of species (61.5%). Taxonomic metrics showed interannual changes in the fish assemblages, which may be related to the dredging and landfill activities for the construction of the highway on the shore of the Saco dos Limões cove. Taxonomic and functional metrics can be used efficiently in environmental monitoring work.