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Microbial biomass and community composition in boreal lake sediments
Author(s) -
Steger Kristin,
Premke Katrin,
Gudasz Cristian,
Sundh Ingvar,
Tranvik Lars J.
Publication year - 2011
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.2011.56.2.0725
Subject(s) - microbial population biology , environmental science , biomass (ecology) , total organic carbon , environmental chemistry , boreal , ecology , dissolved organic carbon , composition (language) , community structure , pelagic zone , chemistry , biology , bacteria , linguistics , philosophy , genetics
We used phospholipid fatty acids (PLFA) to determine microbial biomass and community structure in the sediments of eight boreal lakes with different loadings of allochthonous organic carbon and total phosphorus (TP) in the water during the course of a year. The total concentration of PLFA, an estimate of the microbial biomass, depended more on TP, a proxy for pelagic primary production, but not on dissolved organic carbon, a proxy for terrestrial organic carbon input. The composition of PLFAs varied considerably over time, demonstrating seasonal dynamics in microbial community composition. When PLFA profiles in all lakes and seasons are compared, community composition is more similar within season than within lakes.