Premium
Interannual dynamics and phenology of bacterial communities in a eutrophic lake
Author(s) -
Shade Ashley,
Kent Angela D.,
Jones Stuart E.,
Newton Ryan J.,
Triplett Eric W.,
McMahon Katherine D.
Publication year - 2007
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.2007.52.2.0487
Subject(s) - eutrophication , phenology , water column , environmental science , pelagic zone , ecology , seasonality , community structure , climate change , oceanography , ribosomal intergenic spacer analysis , atmospheric sciences , climatology , nutrient , physical geography , biology , geography , geology , ribosomal rna , biochemistry , internal transcribed spacer , gene
We investigated patterns of intra‐ and interannual change in pelagic bacterial community composition (BCC, assessed using automated ribosomal intergenic spacer analysis) over six years in eutrophic Lake Mendota, Wisconsin. A regular phenology was repeated across years, implying that freshwater bacterial communities are more predictable in their dynamics than previously thought. Seasonal events, such as water column mixing and trends in water temperature, were most strongly related to BCC variation. Communities became progressively less similar across years between the months of May and September, when the lake was thermally stratified. Dissolved oxygen and nitrate + nitrite concentrations were highly correlated to BCC change within and across seasons. The relationship between BCC and seasonal drivers suggests that trajectories of community change observed over long time series will reflect large‐scale climate variation.