GSTDTAP  > 地球科学
DOI10.1073/pnas.2006857118
Carbonate-hosted microbial communities are prolific and pervasive methane oxidizers at geologically diverse marine methane seep sites
Jeffrey J. Marlow; Daniel Hoer; Sean P. Jungbluth; Linda M. Reynard; Amy Gartman; Marko S. Chavez; Mohamed Y. El-Naggar; Noreen Tuross; Victoria J. Orphan; Peter R. Girguis
2021-06-22
Source PublicationProceedings of the National Academy of Science
Year Published2021
Abstract in English

At marine methane seeps, vast quantities of methane move through the shallow subseafloor, where it is largely consumed by microbial communities. This process plays an important role in global methane dynamics, but we have yet to identify all of the methane sinks in the deep sea. Here, we conducted a continental-scale survey of seven geologically diverse seafloor seeps and found that carbonate rocks from all sites host methane-oxidizing microbial communities with substantial methanotrophic potential. In laboratory-based mesocosm incubations, chimney-like carbonates from the newly described Point Dume seep off the coast of Southern California exhibited the highest rates of anaerobic methane oxidation measured to date. After a thorough analysis of physicochemical, electrical, and biological factors, we attribute this substantial metabolic activity largely to higher cell density, mineral composition, kinetic parameters including an elevated Vmax, and the presence of specific microbial lineages. Our data also suggest that other features, such as electrical conductance, rock particle size, and microbial community alpha diversity, may influence a sample’s methanotrophic potential, but these factors did not demonstrate clear patterns with respect to methane oxidation rates. Based on the apparent pervasiveness within seep carbonates of microbial communities capable of performing anaerobic oxidation of methane, as well as the frequent occurrence of carbonates at seeps, we suggest that rock-hosted methanotrophy may be an important contributor to marine methane consumption.

Field地球科学
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Document Type期刊论文
Identifierhttp://119.78.100.173/C666/handle/2XK7JSWQ/330724
Collection地球科学
Recommended Citation
GB/T 7714
Jeffrey J. Marlow,Daniel Hoer,Sean P. Jungbluth,et al. Carbonate-hosted microbial communities are prolific and pervasive methane oxidizers at geologically diverse marine methane seep sites[J]. Proceedings of the National Academy of Science,2021.
APA Jeffrey J. Marlow.,Daniel Hoer.,Sean P. Jungbluth.,Linda M. Reynard.,Amy Gartman.,...&Peter R. Girguis.(2021).Carbonate-hosted microbial communities are prolific and pervasive methane oxidizers at geologically diverse marine methane seep sites.Proceedings of the National Academy of Science.
MLA Jeffrey J. Marlow,et al."Carbonate-hosted microbial communities are prolific and pervasive methane oxidizers at geologically diverse marine methane seep sites".Proceedings of the National Academy of Science (2021).
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