Cianobactérias marinhas bentônicas de ilhas costeiras do Estado de São Paulo, Brasil

Abstract

-(Marine benthic cyanobacteria of coastal islands, São Paulo State, Brazil). Marine benthic Cyanobacteria have always been neglected by taxonomic surveys of the Brazilian coast, exception made for some works focusing the shore of the São Paulo State. For island habitats there is only one study carried out for the Cardoso Island. Therefore, the aim of this study is to improve the knowledge about the richness of cyanobacterial species in marine benthic communities from coastal islands of the São Paulo State. The results show the occurrence of 24 species of Cyanobacteria: Oscillatoriales are represented by 12 species (50%), Nostocales by 6 species (25%) and Chroococcales by 6 species (25%). Among the identified species, four represent new references for the South Atlantic: Cyanodermatium gonzaliensis H. Leon-Tejera et al., Xenococcus pallidus (Hansg.) Komárek & Anagn., Microchaete aeruginea Batters and Hydrocoryne spongiosa Bornet & Flahault, and one is a new occurrence for the coast of Brazil: Rivularia atra Roth. Some nomenclatural updatings were adopted according to the Komárek & Agnostidis more recent system of classification. Key words-benthic Cyanobacteria, coastal islands, São Paulo, taxonomy RESUMO-(Cianobactérias marinhas bentônicas de ilhas costeiras do Estado de São Paulo, Brasil). O grupo das cianobactérias marinhas bentônicas vem sendo freqüentemente excluído dos levantamentos taxonômicos da costa brasileira, com exceção de alguns trabalhos para o litoral paulista. Para o ambiente de ilhas, apenas é conhecido um trabalho para a Ilha do Cardoso. Assim, o objetivo deste estudo consiste em ampliar o conhecimento da riqueza das cianobactérias marinhas bentônicas de ilhas do litoral paulista. Os resultados obtidos mostram a ocorrência de 24 espécies de cianobactérias em ilhas do litoral paulista. A ordem Oscillatoriales foi representada por 12 espécies (50%), Nostocales por 6 espécies (25%) e Chrooccoccales por seis espécies (25%). Entre as espécies identificadas, quatro são novas ocorrências para o litoral Atlântico sul: Cyanodermatium gonzaliensis H. Leon-Tejera et al., Xenococcus pallidus (Hansg.) Komárek & Anagn., Microchaete aeruginea Batters and Hydrocoryne spongiosa Bornet & Flahault e uma nova referência para o litoral brasileiro: Rivularia atra Roth. Atualizações nomenclaturais foram adotadas de acordo com o sistema de classificação mais atual de Komarek & Agnostidis. Palavras-chave-Cyanobacteria bentônica, ilhas costeiras, São Paulo, taxonomia

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