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Biomass and production of phyto‐ and bacterio‐plankton in eutrophic Lake Tystrup, Denmark
Author(s) -
RIEMANN BO
Publication year - 1983
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1983.tb00688.x
Subject(s) - phytoplankton , eutrophication , biomass (ecology) , plankton , algae , pelagic zone , environmental science , photic zone , ecology , bacteria , microbial loop , primary producers , biology , botany , nutrient , genetics
SUMMARY.1 Phytoplankton primary production and biomass were compared with bacterial secondary production estimated by means of frequency of dividing cells (FDC) in eutrophic Lake Tystrup. Denmark. 2 In the upper part of the photic zone, bacterial secondary production constituted 12% of the carbon fixed by the phytoplankton. In vertical profiles, bacterial secondary production ranged from 7.6% (early spring) to 121% (during August) of the carbon fixed by the algae. 3 A close relationship was found between occurrence and activity of bacteria and algae, suggesting that released organic products are of primary importance to the bacteria. 4 The annual phytoplankton primary production was estimated as 227 g C m ‐2 compared to 102 g C m ‐2 assimilated by the bacteria, so 45% of the carbon fixed by the phytoplankton went through pelagic bacteria.