Living Foraminifera in a Brazilian Subtropical Coastal Environment (Flamengo Inlet, Ubatuba, São Paulo State–Brazil)
The aim of the present study is determine living (Rose Bengal stained) foraminifera fauna in the Flamengo Inlet, a subtropical inlet placed in Ubatuba a city from São Paulo State in Brazil. The inlet was sampled during the 2010 austral summer (March): 34 surface sediment samples were collected with a Van Veen grab sampler. Faunal analysis followed standard procedures, where a fixed volume of 50 cm3 of sediment was washed through sieves with 0.50 and 0.062 mm openings and the living plus dead fauna were picked out.
The living foraminifera fauna of the study area among all the samples has a total of 32,002 specimens and is composed mainly by calcareous taxa. The main species found are Buliminella eligantissima, Ammonia beccarii, Brizalina striatula and Nonionella atlantica, all of which are calcareous and very frequent in coastal areas. The Flamengo Inlet has a typical foraminiferal fauna to subtropical coastal environments, with high values of diversity, evenness, abundance and richness revealing that the inlet is not strongly affected by severe anthropogenic impact even though the stations near some marinas, at the inner portion known as “Saco do Ribeira,” showed the lowest abundance and richness values.
KeywordsNon-impacted assemblages South Atlantic foraminiferal assemblages Subtropical coastal environment
The field and laboratory work was financially supported by the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP 2009/13666-1 and 2009/10842-3) and Oceanographic Institute of São Paulo University (IOUSP). Special thanks to the crew of the vessel “Galha Negra” and MSc. Debora do Carmo Linnhares and Mr. Diego Castillo Franco for the help in the sampling operations. We also would like to thank Drs. Joan M. Bernhard and Hiroshi Kitazato for their thorough and helpful comments on the manuscript. The principal author’s Postdoctoral work was funded by a FAPESP scholarship (2009/13666-1) and he was also funded by JAMSTEC, with support to attend the “Field Workshop on Living Foraminifera in Japan”.
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