Temporal patterns in glycolate-utilizing bacterial community composition correlate with phytoplankton population dynamics in humic lakes.

Microbial Ecology
Sara F Paver, Angela D Kent

Abstract

Previous observations of correlated community dynamics between phytoplankton and bacteria in lakes indicate that phytoplankton populations may influence bacterial community structure. To investigate the possibility that bacterial use of phytoplankton exudates contributes to observed patterns of community change, we characterized the diversity and dynamics of heterotrophic bacterioplankton with genetic potential to use glycolate, a photorespiration-specific exudate, in five lakes over a 15-week period. Culture-independent approaches were used to track different bacterial phylotypes represented by DNA sequence variation in the functional gene glycolate oxidase subunit D (glcD). glcD gene sequences from freshwater bacteria exhibited broad phylogenetic diversity, including sequences representing the Alpha-, Beta-, and Gammaproteobacteria, Actinobacteria, Bacteroidetes, Firmicutes, and Verrucomicrobia. The majority of glcD gene sequences were betaproteobacterial, with 48% of the sequences clustering with the glcD gene from the cosmopolitan freshwater species Polynucleobacter necessarius. Terminal restriction fragment length polymorphism fingerprinting of the glcD gene revealed changes in glycolate-utilizing assemblages over time. An...Continue Reading

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Citations

Apr 12, 2013·The ISME Journal·Ashley ShadeNoah Fierer
Jul 6, 2014·PLoS Computational Biology·Hsuan-Chao ChiuElhanan Borenstein
May 15, 2013·Environmental Microbiology·Sara F PaverAngela D Kent
Jun 10, 2014·Environmental Microbiology·Sara F PaverAngela D Kent
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Aug 21, 2020·FEMS Microbiology Ecology·M R SchiaffinoM Reissig
Jul 22, 2021·Bioscience of Microbiota, Food and Health·Yan SunWen-Hui Lee

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