Beyond the tip of the iceberg; a new view of the diversity of sulfite- and sulfate-reducing microorganisms
- Newcastle Univ., Newcastle Upon Tyne (United Kingdom); Shell International Exploration and Production Inc., Houston, TX (United States)
- INRA, Montferrier-sur-Lez (France)
- Shell International Exploration and Production Inc., Houston, TX (United States); USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
- Heriot Watt Univ., Edinburgh (United Kingdom)
- Newcastle Univ., Newcastle Upon Tyne (United Kingdom)
Sulfite-reducing and sulfate-reducing microorganisms (SRM) play important roles in anoxic environments, linking the sulfur and carbon cycles. With climate warming, the distribution of anoxic habitats conductive to dissimilatory SRM is expanding. Consequently, we hypothesize that novel SRM are likely to emerge from the rare biosphere triggered by environmental changes. Using the dsrB gene as a molecular marker of sulfite-reducers and sulfate-reducers, we analyzed the diversity, community composition, and abundance of SRM in 200 samples representing 14 different ecosystems, including marine and freshwater environments, oil reservoirs, and engineered infrastructure. Up to 167,397 species-level OTUs affiliated with 47 different families were identified. Up to 96% of these can be considered as “rare biosphere SRM”. One third of the dsrB genes identified belonged to uncharacterized lineages. The dsrB sequences exhibited a strong pattern of selection in different ecosystems. These results expand our knowledge of the biodiversity and distribution of SRM, with implications for carbon and sulfur cycling in anoxic ecosystems.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1543738
- Journal Information:
- The ISME Journal, Vol. 12, Issue 8; ISSN 1751-7362
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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