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Aquatic Microbial Ecology

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AME 62:241-250 (2011)  -  DOI:

Bacterioplankton community composition in 67 Finnish lakes differs according to trophic status

Eija Kolmonen1, Kaisa Haukka1,3, Anne Rantala-Ylinen1, Pirjo Rajaniemi-Wacklin1,4, Liisa Lepistö2, Kaarina Sivonen1,*

1University of Helsinki, Department of Food and Environmental Sciences, Division of Microbiology, Viikki Biocenter, PO Box 56, 00014 Helsinki University, Finland
2Finnish Environment Institute, PO Box 140, 00251 Helsinki, Finland
3Present address: National Institute for Health and Welfare, PO Box 30, 00271 Helsinki, Finland
4Present address:
Finnish Red Cross Blood Service, Research and Development, Kivihaantie 7, 00310 Helsinki, Finland
*Corresponding author. Email:

ABSTRACT: The bacterioplankton composition of 67 Finnish lakes was characterised by denaturing gradient gel electrophoresis (DGGE) of PCR-amplified 16S rRNA gene fragments, and subsequent sequence analyses of major fragments. The DGGE patterns grouped as a function of environmental characteristics describing the trophic status of the lakes, such as total phosphorus (TP), total nitrogen (TN), TN:TP, chlorophyll a, Secchi depth and water colour. Most sequences retrieved represented Verrucomicrobia, Actinobacteria and Cyanobacteria, while those representing Alpha- and Gamma-proteobacteria, Chloroflexi and Acidobacteria were less frequent. The presence of several sequences could be linked to the trophic status of the lakes, while that of others was more common and thus unrelated to the trophic status. These results suggest that individual responses towards environmental factors may occur among the bacterioplankton at the level of phyla as well as phylotypes.

KEY WORDS: Bacterioplankton community composition · Lake trophic status · DGGE · Canonical correspondence analysis · CCA

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Cite this article as: Kolmonen E, Haukka K, Rantala-Ylinen A, Rajaniemi-Wacklin P, Lepistö L, Sivonen K (2011) Bacterioplankton community composition in 67 Finnish lakes differs according to trophic status. Aquat Microb Ecol 62:241-250.

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