The distribution and biomass of phytoplankton and phototrophic bacteria in Framvaren, a permanently anoxic fjord in Norway |
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| Authors: | Kai Srensen |
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| Institution: | Kai Sørensen |
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| Abstract: | The vertical distribution and biomass of phytoplankton and phototrophic bacteria in the permanently anoxic fjord, Framvaren in southern Norway, are described. The distribution of algal and bacterial pigments was studied at different seasons in the period from May 1980 to February 1985. The standing crop of phytoplankton was low in the upper part of the euphotic zone, but increased near the O2/H2S interface. An algal plate and a dense plate of phototrophic bacteria, measured as chlorophyll fluorescence and scattering, were detected near the interface. These plates of phototrophic micro-organisms were found to be photosynthetically active. Sharp concentration peaks near the interface were also found for the active biomass measured as adenosine triphosphate (ATP). |
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