Toggle Main Menu Toggle Search

Open Access padlockePrints

Activity and community structures of sulfate-reducing microorganisms in polar, temperate and tropical marine sediments

Lookup NU author(s): Dr Casey Hubert


Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


© 2016 International Society for Microbial Ecology All rights reserved. Temperature has a fundamental impact on the metabolic rates of microorganisms and strongly influences microbial ecology and biogeochemical cycling in the environment. In this study, we examined the catabolic temperature response of natural communities of sulfate-reducing microorganisms (SRM) in polar, temperate and tropical marine sediments. In short-term sediment incubation experiments with 35S-sulfate, we demonstrated how the cardinal temperatures for sulfate reduction correlate with mean annual sediment temperatures, indicating specific thermal adaptations of the dominant SRM in each of the investigated ecosystems. The community structure of putative SRM in the sediments, as revealed by pyrosequencing of bacterial 16S rRNA gene amplicons and phylogenetic assignment to known SRM taxa, consistently correlated with in situ temperatures, but not with sediment organic carbon concentrations or C:N ratios of organic matter. Additionally, several species-level SRM phylotypes of the class Deltaproteobacteria tended to co-occur at sites with similar mean annual temperatures, regardless of geographic distance. The observed temperature adaptations of SRM imply that environmental temperature is a major controlling variable for physiological selection and ecological and evolutionary differentiation of microbial communities.

Publication metadata

Author(s): Robador A, Muller AL, Sawicka JE, Berry D, Hubert CRJ, Loy A, Jorgensen BB, Bruchert V

Publication type: Article

Publication status: Published

Journal: ISME Journal

Year: 2016

Volume: 10

Issue: 4

Pages: 796-809

Print publication date: 01/04/2016

Online publication date: 11/09/2015

Acceptance date: 25/07/2015

ISSN (print): 1751-7362

ISSN (electronic): 1751-7370

Publisher: Nature Publishing Group


DOI: 10.1038/ismej.2015.157


Altmetrics provided by Altmetric