Members of a readily enriched beta-proteobacterial clade are common in surface waters of a humic lake.

ABSTRACT: Humic lakes are systems often characterized by irregular high input of dissolved organic carbon (DOC) from the catchment. We hypothesized that specific bacterial groups which rapidly respond to changes in DOC availability might form large populations in such habitats. Seasonal changes of microbial community composition were studied in two compartments of an artificially divided bog lake with contrasting DOC inputs. These changes were compared to community shifts induced during short-term enrichment experiments. Inocula from the two compartments were diluted 1:10 into water from the more DOC-rich compartment, and inorganic nutrients were added to avoid microbial N and P limitation. The dilutions were incubated for a period of 2 weeks. The microbial assemblages were analyzed by cloning and s

SUBMITTER: Burkert U 

PROVIDER: S-EPMC262289 | biostudies-literature | 2003 Nov

REPOSITORIES: biostudies-literature