Spatial and temporal   variation of bacterioplankton abundance and biomass in a coastal lagoon (Ria Formosa, SE Portugal)

Barbosa, Ana B.

http://hdl.handle.net/10400.1/1901

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Authors

Barbosa, Ana B.

Abstract(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.

Keywords

Heterotrophic bacterioplankton CFU Coastal lagoon Ria Formosa BOD Phytoplankton

URI

http://hdl.handle.net/10400.1/1901

Citation

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.