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Spatial and temporal variation of bacterioplankton abundance and biomass in a coastal lagoon (Ria Formosa, SE Portugal)
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Resumo(s)
Water samples were collected at bimonthly intervals (April – October 1988) from three stations located in the Ria Formosa coastal lagoon (SE Portugal). Abundance and biovolume of heterotrophic bacterioplankton ranged between 1.2 – 18 x 106 cells.ml-1 and 0.10 - 0.21 μm3.cell-1, respectively. Lowest values were detected at the station close to the ocean and highest values at the station impacted by a domestic effluent. Total bacterial counts showed slight temporal fluctuations while saprophyte numbers (Colony Forming Units) presented a much stronger variation, with maxima during summer. Biovolume exhibited minimal values during summer. Reasons for different patterns of spatial and temporal variability of the bacterial population are discussed.
Descrição
Palavras-chave
Heterotrophic bacterioplankton CFU Coastal lagoon Ria Formosa BOD Phytoplankton
Contexto Educativo
Citação
Barbosa, AB, 1991. Spatial and temporal variation of bacterioplankton abundance and biomass in a coastal lagoon (Ria Formosa, SE Portugal). Kieler Meeresforschungen, Sonderh., 8: 66-73.