Factors affecting the bacterial community composition and heterotrophic production of Columbia River estuarine turbidity maxima.

ABSTRACT: Estuarine turbidity maxima (ETM) function as hotspots of microbial activity and diversity in estuaries, yet, little is known about the temporal and spatial variability in ETM bacterial community composition. To determine which environmental factors affect ETM bacterial populations in the Columbia River estuary, we analyzed ETM bacterial community composition (Sanger sequencing and amplicon pyrosequencing of 16S rRNA gene) and bulk heterotrophic production (³ H-leucine incorporation rates). We collected water 20 times to cover five ETM events and obtained 42 samples characterized by different salinities, turbidities, seasons, coastal regimes (upwelling vs. downwelling), locations, and particle size. Spring and summer populations were distinct. All May samples had similar bacteria

SUBMITTER: Herfort L 

PROVIDER: S-EPMC5727365 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature