Annual cycle and composition of the phytoplankton in the Quempillen River Estuary,southern Chile |
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| Authors: | JE Toro |
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| Institution: | Centro de Investigaciones Marinas, Universidad Austral de Chile, Casilla 567, Valdiva, Chile |
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| Abstract: | Phytoplankton species and abundance were studied in the Quempillen River Estuary, from August 1979 to July 1980 in addition to some important environmental factors: salinity, temperature and dissolved oxygen. In order to determine the seasonal variations in cell density and biomass of the phytoplankton in this brackish aquatic environment, phytoplankton data obtained by the Uthermöhl (1958) technique were analysed.A total of 109 phytoplankton species were identified within the samples. Throughout the year there were two periods of population maxima, September and May, and one period of high biomass, February. The phytoflagellates were always present but only dominated the flora when diatoms were extremely reduced, especially during low tide periods. |
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| Keywords: | phytoplankton estuaries variation abundance biomass Chile Coast |
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