Metaproteomics reveals differential modes of metabolic coupling among ubiquitous oxygen minimum zone microbes.

ABSTRACT: Marine oxygen minimum zones (OMZs) are intrinsic water column features arising from respiratory oxygen demand during organic matter degradation in stratified waters. Currently OMZs are expanding due to global climate change with resulting feedback on marine ecosystem function. Here we use metaproteomics to chart spatial and temporal patterns of gene expression along defined redox gradients in a seasonally stratified fjord to better understand microbial community responses to OMZ expansion. The expression of metabolic pathway components for nitrification, anaerobic ammonium oxidation (anammox), denitrification, and inorganic carbon fixation were differentially expressed across the redoxcline and covaried with distribution patterns of ubiquitous OMZ microbes including Thaumarchaeota, Nitrosp

SUBMITTER: Hawley AK 

PROVIDER: S-EPMC4128106 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature