Bacterial interactions during sequential degradation of cyanobacterial necromass in a sulfidic arctic marine sediment.

ABSTRACT: Seafloor microorganisms impact global carbon cycling by mineralizing vast quantities of organic matter (OM) from pelagic primary production, which is predicted to increase in the Arctic because of diminishing sea ice cover. We studied microbial interspecies-carbon-flow during anaerobic OM degradation in arctic marine sediment using stable isotope probing. We supplemented sediment incubations with ¹³ C-labeled cyanobacterial necromass (spirulina), mimicking fresh OM input, or acetate, an important OM degradation intermediate and monitored sulfate reduction rates and concentrations of volatile fatty acids (VFAs) during substrate degradation. Sequential 16S rRNA gene and transcript amplicon sequencing and fluorescence in situ hybridization combined with Raman microspectroscopy reve

SUBMITTER: Muller AL 

PROVIDER: S-EPMC6175234 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature