Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds

Archaea mediating anaerobic methane oxidation are key in preventing methane produced in marine sediments from reaching the hydrosphere; however, a complete understanding of how microbial communities in natural settings respond to changes in the flux of methane remains largely uncharacterized. We inv...

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Published in:Nature Communications
Main Authors: Klasek, Scott A., Hong, Wei Li, Torres, Marta E., Ross, Stella, Hostetler, Katelyn, Portnov, Alexey, Gründger, Friederike, Colwell, Frederick S.
Format: Article in Journal/Newspaper
Language:English
Published: 2021
Subjects:
Online Access:https://pure.au.dk/portal/da/publications/distinct-methanedependent-biogeochemical-states-in-arctic-seafloor-gas-hydrate-mounds(0d96d3fa-ebce-4465-bd8e-7d12bb23491c).html
https://doi.org/10.1038/s41467-021-26549-5
http://www.scopus.com/inward/record.url?scp=85118468229&partnerID=8YFLogxK
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spelling ftuniaarhuspubl:oai:pure.atira.dk:publications/0d96d3fa-ebce-4465-bd8e-7d12bb23491c 2023-12-03T10:14:46+01:00 Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds Klasek, Scott A. Hong, Wei Li Torres, Marta E. Ross, Stella Hostetler, Katelyn Portnov, Alexey Gründger, Friederike Colwell, Frederick S. 2021-11 https://pure.au.dk/portal/da/publications/distinct-methanedependent-biogeochemical-states-in-arctic-seafloor-gas-hydrate-mounds(0d96d3fa-ebce-4465-bd8e-7d12bb23491c).html https://doi.org/10.1038/s41467-021-26549-5 http://www.scopus.com/inward/record.url?scp=85118468229&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/da/publications/distinct-methanedependent-biogeochemical-states-in-arctic-seafloor-gas-hydrate-mounds(0d96d3fa-ebce-4465-bd8e-7d12bb23491c).html info:eu-repo/semantics/openAccess Klasek , S A , Hong , W L , Torres , M E , Ross , S , Hostetler , K , Portnov , A , Gründger , F & Colwell , F S 2021 , ' Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds ' , Nature Communications , vol. 12 , 6296 . https://doi.org/10.1038/s41467-021-26549-5 article 2021 ftuniaarhuspubl https://doi.org/10.1038/s41467-021-26549-5 2023-11-08T23:59:57Z Archaea mediating anaerobic methane oxidation are key in preventing methane produced in marine sediments from reaching the hydrosphere; however, a complete understanding of how microbial communities in natural settings respond to changes in the flux of methane remains largely uncharacterized. We investigate microbial communities in gas hydrate-bearing seafloor mounds at Storfjordrenna, offshore Svalbard in the high Arctic, where we identify distinct methane concentration profiles that include steady-state, recently-increasing subsurface diffusive flux, and active gas seepage. Populations of anaerobic methanotrophs and sulfate-reducing bacteria were highest at the seep site, while decreased community diversity was associated with a recent increase in methane influx. Despite high methane fluxes and methanotroph doubling times estimated at 5–9 months, microbial community responses were largely synchronous with the advancement of methane into shallower sediment horizons. Together, these provide a framework for interpreting subseafloor microbial responses to methane escape in a warming Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Storfjordrenna Svalbard Aarhus University: Research Arctic Arctic Ocean Storfjordrenna ENVELOPE(17.000,17.000,76.000,76.000) Svalbard Nature Communications 12 1
institution Open Polar
collection Aarhus University: Research
op_collection_id ftuniaarhuspubl
language English
description Archaea mediating anaerobic methane oxidation are key in preventing methane produced in marine sediments from reaching the hydrosphere; however, a complete understanding of how microbial communities in natural settings respond to changes in the flux of methane remains largely uncharacterized. We investigate microbial communities in gas hydrate-bearing seafloor mounds at Storfjordrenna, offshore Svalbard in the high Arctic, where we identify distinct methane concentration profiles that include steady-state, recently-increasing subsurface diffusive flux, and active gas seepage. Populations of anaerobic methanotrophs and sulfate-reducing bacteria were highest at the seep site, while decreased community diversity was associated with a recent increase in methane influx. Despite high methane fluxes and methanotroph doubling times estimated at 5–9 months, microbial community responses were largely synchronous with the advancement of methane into shallower sediment horizons. Together, these provide a framework for interpreting subseafloor microbial responses to methane escape in a warming Arctic Ocean.
format Article in Journal/Newspaper
author Klasek, Scott A.
Hong, Wei Li
Torres, Marta E.
Ross, Stella
Hostetler, Katelyn
Portnov, Alexey
Gründger, Friederike
Colwell, Frederick S.
spellingShingle Klasek, Scott A.
Hong, Wei Li
Torres, Marta E.
Ross, Stella
Hostetler, Katelyn
Portnov, Alexey
Gründger, Friederike
Colwell, Frederick S.
Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds
author_facet Klasek, Scott A.
Hong, Wei Li
Torres, Marta E.
Ross, Stella
Hostetler, Katelyn
Portnov, Alexey
Gründger, Friederike
Colwell, Frederick S.
author_sort Klasek, Scott A.
title Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds
title_short Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds
title_full Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds
title_fullStr Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds
title_full_unstemmed Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds
title_sort distinct methane-dependent biogeochemical states in arctic seafloor gas hydrate mounds
publishDate 2021
url https://pure.au.dk/portal/da/publications/distinct-methanedependent-biogeochemical-states-in-arctic-seafloor-gas-hydrate-mounds(0d96d3fa-ebce-4465-bd8e-7d12bb23491c).html
https://doi.org/10.1038/s41467-021-26549-5
http://www.scopus.com/inward/record.url?scp=85118468229&partnerID=8YFLogxK
long_lat ENVELOPE(17.000,17.000,76.000,76.000)
geographic Arctic
Arctic Ocean
Storfjordrenna
Svalbard
geographic_facet Arctic
Arctic Ocean
Storfjordrenna
Svalbard
genre Arctic
Arctic
Arctic Ocean
Storfjordrenna
Svalbard
genre_facet Arctic
Arctic
Arctic Ocean
Storfjordrenna
Svalbard
op_source Klasek , S A , Hong , W L , Torres , M E , Ross , S , Hostetler , K , Portnov , A , Gründger , F & Colwell , F S 2021 , ' Distinct methane-dependent biogeochemical states in Arctic seafloor gas hydrate mounds ' , Nature Communications , vol. 12 , 6296 . https://doi.org/10.1038/s41467-021-26549-5
op_relation https://pure.au.dk/portal/da/publications/distinct-methanedependent-biogeochemical-states-in-arctic-seafloor-gas-hydrate-mounds(0d96d3fa-ebce-4465-bd8e-7d12bb23491c).html
op_rights info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.1038/s41467-021-26549-5
container_title Nature Communications
container_volume 12
container_issue 1
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