Allochthonous carbon is a major regulator to bacterial growth and community composition in subarctic freshwaters.

ABSTRACT: In the subarctic region, climate warming and permafrost thaw are leading to emergence of ponds and to an increase in mobility of catchment carbon. As carbon of terrestrial origin is increasing in subarctic freshwaters the resource pool supporting their microbial communities and metabolism is changing, with consequences to overall aquatic productivity. By sampling different subarctic water bodies for a one complete year we show how terrestrial and algal carbon compounds vary in a range of freshwaters and how differential organic carbon quality is linked to bacterial metabolism and community composition. We show that terrestrial drainage and associated nutrients supported higher bacterial growth in ponds and river mouths that were influenced by fresh terrestrial carbon than in large lakes wi

SUBMITTER: Roiha T 

PROVIDER: S-EPMC5043279 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature