Composição e estrutura da comunidade zooplanctônica de um estuário tropical (Espírito Santo, Brasil)

• Ano de defesa: 2010
• Autor(a) principal: Nunes, Rafaela Aliprandi
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Oceanografia Ambiental; UFES; Programa de Pós-Graduação em Oceanografia Ambiental
• Palavras-chave em Português: Marés; Piraquê-Açú, Rio (ES); Piraquê-Mirim, Rio (ES); Zooplancto; Copépode; Variação (Biologia); Espírito Santo (Estado); Ciências Ambientais; 55
• Link de acesso: http://repositorio.ufes.br/handle/10/2054

With the aim to analyze the zooplankton community structure at the Piraquêaçu/ Piraquê-mirim Rivers Estuary, regarding their temporal and spatial variations and tidal, monthly sampling between May 2008 and April 2009 were performed, during the neap and spring tides, in four sampling locations. A total of 64 taxons were identified, with Arthropoda being the most representative with 47 taxons. The most abundant species (88.32% of the total samples) were the copepods Acartia lilljeborgi, Temora turbinata, Parvocalanus crassirostris, Oithona oswaldocruzi, Oithona oculata, Euterpina acutifrons, Paracalanus parvus, Brachyura larvae, Cirripedia (cypris and nauplius) and Gastropoda larvae. Average total abundance presented a defined seasonal and spatial pattern, with higher values during the raining period and at the inner estuary stations, however, no pattern related to tidal fluctuation was observed. Species richness did not show a temporal pattern related to tidal fluctuations, however, a spatial pattern was observed, with higher values closer to the estuary entrance. Diveristy and equitabilty did not present either a temporal or spatial pattern, nor in relation to tides. The Piraquê-açú/Piraquê-mirim river estuary is strongly influenced by the rainfall regime. Variability of the environmental conditions, however, caused alterations in the zooplankton composition, temporal and spatial distributions in this estuary.