Phytoplankton Dynamics in Three Metropolitan Beaches of the Amazon Littoral (São Luís-Maranhão)

• DOI: 10.2112/si75-083.1
• Publication Date: 2016-08-22T14:39:29Z
• Authors: Jislene B. Matos; Antonio R.G. Oliv...; Wellington N. Tri...; Natália R. Leite; Maria L. Koening; Luci C.C. Pereira; Rauquírio M. da C...
• Keywords: Dry season; Wet season; Seasonality; Turbidity

Matos, J.B.; Oliveira, A.R.G.; Trindade, W.N.; Leite, N.R.; Koening, M.L.; Pereira, L.C.C., and Costa, R.M. da., 2016. Phytoplankton dynamics in three metropolitan beaches of the Amazon littoral (São Luís-Maranhão). In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., McCarroll, R.J. (eds.), Proceedings 14th International Coastal Symposium (Sydney, Australia). Journal Research, Special Issue, No. 75, pp. 413–417. Coconut Creek (Florida), ISSN 0749-0208.The present study was based on a spatial-temporal analysis phytoplankton São Luís (Maranhão) with aim understanding influence factors community. Samples were obtained dry season (December 2008 October 2009) rainy (March June, 2009), collected using internationally standardized methods. Salinity significantly higher during season, while temperature, dissolved oxygen, pH, turbidity nutrient concentrations (nitrate) all season. Diatoms contributed to high taxonomic richness observed at beaches. Total density chlorophyll-a (20.9 mg.m−3; B1) highest months, densities being B3 (1274.3 x 103 cell.L−1). The cluster revealed formation two groups influenced by seasonality, reflecting relative homogeneity results indicate that variation composition is determined degree interaction between highly hydrodynamic characteristics typical Amazonian environments local rainfall cycle, which modulates other environmental variables, such as salinity concentrations, thus affecting coastal communities. strong antropogenic these urban (sewage effluent discharges) also interfered within phytoplankton.