Bacterial response to permafrost derived organic matter input in an Arctic fjord
Source at: http://doi.org/10.3389/fmars.2018.00263 The warming of the Arctic causes increased riverine discharge, coastal erosion, and the thawing of permafrost. Together, this is leading to an increased wash out of terrestrial dissolved organic matter (tDOM) into the coastal Arctic ecosystems. This...
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Language: | English |
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Online Access: | https://hdl.handle.net/10037/14142 https://doi.org/10.3389/fmars.2018.00263 |
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ftunivtroemsoe:oai:munin.uit.no:10037/14142 2023-05-15T14:22:11+02:00 Bacterial response to permafrost derived organic matter input in an Arctic fjord Müller, Oliver Seuthe, Lena Bratbak, Gunnar Paulsen, Maria Lund 2018-08-06 https://hdl.handle.net/10037/14142 https://doi.org/10.3389/fmars.2018.00263 eng eng Frontiers Media Frontiers in Marine Science info:eu-repo/grantAgreement/RCN/POLARPROG/227062/Norway/Microorganisms in the arctic: major drivers of biogeochemical cycles and climate change// info:eu-repo/grantAgreement/RCN/POLRES/227062/Norway/Microorganisms in the arctic: major drivers of biogeochemical cycles and climate change// info:eu-repo/grantAgreement/RCN/POLARPROG/226415/Norway/Bridging marine productivity regimes: How Atlantic advection affects productivity, carbon cycling and export in a melting Arctic Ocean// info:eu-repo/grantAgreement/RCN/POLARPROG/225956/Norway/Processes and Players in Arctic Marine Pelagic Food Webs - Biogeochemistry, Environment and Climate Change// Müller, O., Seuthe, L., Bratbak, G. & Paulsen, M. L. (2018). Bacterial response to permafrost derived organic matter input in an Arctic fjord. Frontiers in Marine Science, 5, (263) 1-12. http://doi.org/10.3389/fmars.2018.00263 FRIDAID 1612521 doi:10.3389/fmars.2018.00263 2296-7745 https://hdl.handle.net/10037/14142 openAccess VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Basic biosciences: 470 VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe https://doi.org/10.3389/fmars.2018.00263 2021-06-25T17:56:10Z Source at: http://doi.org/10.3389/fmars.2018.00263 The warming of the Arctic causes increased riverine discharge, coastal erosion, and the thawing of permafrost. Together, this is leading to an increased wash out of terrestrial dissolved organic matter (tDOM) into the coastal Arctic ecosystems. This tDOM may be anticipated to affect both carbon and nutrient flow in the microbial food web and microbial community composition, but there are few studies detailing this in Arctic marine ecosystems. We tested the effects of tDOM on the bacterial community composition and net-growth by extracting DOM from the active layer of permafrost soil and adding the aged tDOM concentrate to a natural microbial fjord community (Kongsfjorden, NW Svalbard). This resulted in an increased carbon load of 128μM DOC in the tDOM treatment relative to the control of 83μM DOC. We observed changes in community composition and activity in incubations already within 12 h where tDOM was added. Flow cytometry revealed that predominantly large bacteria increased in the tDOM treated incubations. The increase of this group correlated with the increase in relative abundance of the genus Glaciecola (Gammaproteobacteria). Glaciecola were initially not abundant in the bacterial community (0.6%), but their subsequent increase up to 47% after 4 days upon tDOM addition compared to 8% in control incubations indicates that they are likely capable of degrading permafrost derived DOM. Further, according to our experimental results we hypothesize that the tDOM addition increased bacterivorous grazing by small protists and thus tDOM might indirectly also effect higher trophic levels of the microbial food web. Article in Journal/Newspaper Arctic Arctic Kongsfjord* Kongsfjorden permafrost Svalbard University of Tromsø: Munin Open Research Archive Arctic Svalbard Frontiers in Marine Science 5 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Basic biosciences: 470 VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Basic biosciences: 470 VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 Müller, Oliver Seuthe, Lena Bratbak, Gunnar Paulsen, Maria Lund Bacterial response to permafrost derived organic matter input in an Arctic fjord |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 VDP::Mathematics and natural science: 400::Basic biosciences: 470 VDP::Matematikk og Naturvitenskap: 400::Basale biofag: 470 |
description |
Source at: http://doi.org/10.3389/fmars.2018.00263 The warming of the Arctic causes increased riverine discharge, coastal erosion, and the thawing of permafrost. Together, this is leading to an increased wash out of terrestrial dissolved organic matter (tDOM) into the coastal Arctic ecosystems. This tDOM may be anticipated to affect both carbon and nutrient flow in the microbial food web and microbial community composition, but there are few studies detailing this in Arctic marine ecosystems. We tested the effects of tDOM on the bacterial community composition and net-growth by extracting DOM from the active layer of permafrost soil and adding the aged tDOM concentrate to a natural microbial fjord community (Kongsfjorden, NW Svalbard). This resulted in an increased carbon load of 128μM DOC in the tDOM treatment relative to the control of 83μM DOC. We observed changes in community composition and activity in incubations already within 12 h where tDOM was added. Flow cytometry revealed that predominantly large bacteria increased in the tDOM treated incubations. The increase of this group correlated with the increase in relative abundance of the genus Glaciecola (Gammaproteobacteria). Glaciecola were initially not abundant in the bacterial community (0.6%), but their subsequent increase up to 47% after 4 days upon tDOM addition compared to 8% in control incubations indicates that they are likely capable of degrading permafrost derived DOM. Further, according to our experimental results we hypothesize that the tDOM addition increased bacterivorous grazing by small protists and thus tDOM might indirectly also effect higher trophic levels of the microbial food web. |
format |
Article in Journal/Newspaper |
author |
Müller, Oliver Seuthe, Lena Bratbak, Gunnar Paulsen, Maria Lund |
author_facet |
Müller, Oliver Seuthe, Lena Bratbak, Gunnar Paulsen, Maria Lund |
author_sort |
Müller, Oliver |
title |
Bacterial response to permafrost derived organic matter input in an Arctic fjord |
title_short |
Bacterial response to permafrost derived organic matter input in an Arctic fjord |
title_full |
Bacterial response to permafrost derived organic matter input in an Arctic fjord |
title_fullStr |
Bacterial response to permafrost derived organic matter input in an Arctic fjord |
title_full_unstemmed |
Bacterial response to permafrost derived organic matter input in an Arctic fjord |
title_sort |
bacterial response to permafrost derived organic matter input in an arctic fjord |
publisher |
Frontiers Media |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/14142 https://doi.org/10.3389/fmars.2018.00263 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Arctic Kongsfjord* Kongsfjorden permafrost Svalbard |
genre_facet |
Arctic Arctic Kongsfjord* Kongsfjorden permafrost Svalbard |
op_relation |
Frontiers in Marine Science info:eu-repo/grantAgreement/RCN/POLARPROG/227062/Norway/Microorganisms in the arctic: major drivers of biogeochemical cycles and climate change// info:eu-repo/grantAgreement/RCN/POLRES/227062/Norway/Microorganisms in the arctic: major drivers of biogeochemical cycles and climate change// info:eu-repo/grantAgreement/RCN/POLARPROG/226415/Norway/Bridging marine productivity regimes: How Atlantic advection affects productivity, carbon cycling and export in a melting Arctic Ocean// info:eu-repo/grantAgreement/RCN/POLARPROG/225956/Norway/Processes and Players in Arctic Marine Pelagic Food Webs - Biogeochemistry, Environment and Climate Change// Müller, O., Seuthe, L., Bratbak, G. & Paulsen, M. L. (2018). Bacterial response to permafrost derived organic matter input in an Arctic fjord. Frontiers in Marine Science, 5, (263) 1-12. http://doi.org/10.3389/fmars.2018.00263 FRIDAID 1612521 doi:10.3389/fmars.2018.00263 2296-7745 https://hdl.handle.net/10037/14142 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.3389/fmars.2018.00263 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
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1766294831080931328 |