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Title: Microfitoplâncton de águas costeiras amazônicas: Ilha Canela (Bragança, PA, Brasil)
Other Titles: Microphytoplankton of Amazon coastal waters: Canela Island (Bragança, Pará State, Brazil)
metadata.dc.creator: SOUSA, Eliane Brabo de
COSTA, Vanessa Bandeira da
PEREIRA, Luci Cajueiro Carneiro
COSTA, Rauquírio André Albuquerque Marinho da
Keywords: Microplancton
Variação sazonal
Ilha Canela - PA
Bragança - PA
Pará - Estado
Amazônia brasileira
Issue Date: Sep-2008
Citation: SOUSA, Eliane Brabo de et al. Microfitoplâncton de águas costeiras amazônicas: Ilha Canela (Bragança, PA, Brasil). Acta Botanica Brasilica, São Paulo, v. 22, n. 3, p. 626-636, jul./set. 2008. Disponível em: <>. Acesso em: 03 fev. 2014. <>.
Abstract: Seasonal and nyctemeral variations of the microphytoplankton were studied at a fixed station (00º46'37.2''S-046º43'24.5''W) on Canela Island (North Brazil) in September and December/2004 (dry season) and in March and June/2005 (rainy season). Samples for qualitative phytoplankton studies were obtained by filtering 400 L of surface water in the surf zone of the island through plankton nets (65 μm mesh size). Field work was carried out during spring tides and samples were collected every 3 hours during a 24-hour period. The collected material was fixed in neutral formaldehyde at 4%. Simultaneously, salinity of the water surface was also measured. Salinity showed significant variation throughout the study period, ranging from 26.1 (June/2005) to 39.0 (December/2004), characterizing the environment as euhaline-polyhaline. A total of 130 taxa were identified, belonging to Cyanophyta (two taxa), Bacillariophyta (115 taxa) and Dinophyta (13 taxa). Diatoms were the dominant group of microphytoplankton at Canela Island. Asterionellopsis glacialis, Dimeregramma minor, Skeletonema sp. and Thalassiosira subtilis were the most frequent and abundant taxa. High salinities favored the occurrence of polyhalobous neritic marine species. Resuspension processes caused by wind and wave surf zone were responsible for exchange between planktonic and ticoplanktonic populations, including species such as Dimeregramma minor, Triceratium biquadratum and T. pentacrinus which represented new occurrences for the Amazon coast.
ISSN: 0102-3306
Appears in Collections:Artigos Científicos - FBIO/IECOS

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