Implications of a changing Arctic on microbial communities: Following the effects of thawing permafrost from land to sea
Climate change has severe impacts in the Arctic, where permafrost is thawing, glaciers are retreating and sea ice is melting. These physical changes are not only affecting large predators like polar bears, but also microscopic organisms such as Bacteria and Archaea. The impacts on microbes are far m...
Published in: | Environmental Microbiology |
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Main Author: | |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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The University of Bergen
2018
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Subjects: | |
Online Access: | https://hdl.handle.net/1956/18525 |
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ftunivbergen:oai:bora.uib.no:1956/18525 |
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Open Polar |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Klimaendringer Marin mikrobiologi Marine bakterier Mikrobiell økologi Permafrost Arktis https://data.ub.uio.no/realfagstermer/c030972 https://data.ub.uio.no/realfagstermer/c003160 https://data.ub.uio.no/realfagstermer/c003051 https://data.ub.uio.no/realfagstermer/c009111 https://data.ub.uio.no/realfagstermer/c013886 https://data.ub.uio.no/realfagstermer/c001406 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 |
spellingShingle |
Klimaendringer Marin mikrobiologi Marine bakterier Mikrobiell økologi Permafrost Arktis https://data.ub.uio.no/realfagstermer/c030972 https://data.ub.uio.no/realfagstermer/c003160 https://data.ub.uio.no/realfagstermer/c003051 https://data.ub.uio.no/realfagstermer/c009111 https://data.ub.uio.no/realfagstermer/c013886 https://data.ub.uio.no/realfagstermer/c001406 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Müller, Oliver Implications of a changing Arctic on microbial communities: Following the effects of thawing permafrost from land to sea |
topic_facet |
Klimaendringer Marin mikrobiologi Marine bakterier Mikrobiell økologi Permafrost Arktis https://data.ub.uio.no/realfagstermer/c030972 https://data.ub.uio.no/realfagstermer/c003160 https://data.ub.uio.no/realfagstermer/c003051 https://data.ub.uio.no/realfagstermer/c009111 https://data.ub.uio.no/realfagstermer/c013886 https://data.ub.uio.no/realfagstermer/c001406 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 |
description |
Climate change has severe impacts in the Arctic, where permafrost is thawing, glaciers are retreating and sea ice is melting. These physical changes are not only affecting large predators like polar bears, but also microscopic organisms such as Bacteria and Archaea. The impacts on microbes are far more concerning, as they are the main drivers of global biogeochemical cycles. Microbial-driven degradation of recently thawed permafrost organic matter is causing the release of critical greenhouse gases, including methane (CH4) and carbon dioxide (CO2). Parts of this formerly preserved organic carbon pool is upon thaw transported into marine systems, affecting the structure and dynamics of marine microbial communities. This thesis addresses the extensive implications of thawing permafrost on Arctic microbes. I investigated not only the microbial community composition and processes directly within the soil, but also the indirect effects of permafrost derived carbon run-off on the marine microbial structure, function and activity. By analyzing the microbial community composition, using high-throughput 16S rRNA gene sequencing, new insights on how microbial communities are structured in permafrost (Paper I), in a run-off affected fjord system (Paper II) and the Arctic Ocean (Paper IV and V) were revealed. 16S rRNA gene sequencing was also used to elucidate how permafrost derived organic matter affected the community structure and activity of coastal microbial communities (Paper III). Together, these results improve our understanding on how microbial community patterns can be used to explain biochemical processes like carbon degradation (Paper I, II, III and IV). We analyzed shifts in community composition due to climate change processes like permafrost thawing (Paper I) and carbon run-off (Paper III), thereby providing insights on which organisms and processes will be sensitive to the changes in a warmer Arctic. Permafrost is increasingly thawing, which will stimulate microbial activity, and subsequently cause the ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Müller, Oliver |
author_facet |
Müller, Oliver |
author_sort |
Müller, Oliver |
title |
Implications of a changing Arctic on microbial communities: Following the effects of thawing permafrost from land to sea |
title_short |
Implications of a changing Arctic on microbial communities: Following the effects of thawing permafrost from land to sea |
title_full |
Implications of a changing Arctic on microbial communities: Following the effects of thawing permafrost from land to sea |
title_fullStr |
Implications of a changing Arctic on microbial communities: Following the effects of thawing permafrost from land to sea |
title_full_unstemmed |
Implications of a changing Arctic on microbial communities: Following the effects of thawing permafrost from land to sea |
title_sort |
implications of a changing arctic on microbial communities: following the effects of thawing permafrost from land to sea |
publisher |
The University of Bergen |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/18525 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic microbes Arctic Arctic Ocean Arktis Arktis* Climate change Ice permafrost Sea ice |
genre_facet |
Arctic Arctic microbes Arctic Arctic Ocean Arktis Arktis* Climate change Ice permafrost Sea ice |
op_relation |
Paper I: Müller O, Bang-Andreasen T, White III RA, Elberling B, Taş N, Kneafsey T, Jansson JK, Øvreås L (2018). Disentangling the complexity of permafrost soil by using high resolution profiling of microbial community composition, key functions and respiration rates. https://doi.org/10.1111/1462-2920.14348 Paper II: Paulsen ML, Müller O, Larsen A, Møller EF, Sejr MK, Middelboe M, and Stedmon CA (2018). Biological transformation of Arctic dissolved organic matter in a NE Greenland fjord. (Manuscript under review in Limnology and Oceanography). Full-text not available. Paper III: Müller O, Seuthe L, Bratbak G, Paulsen ML (2018) Bacterial response to permafrost derived organic matter input in an Arctic fjord. (Manuscript under review in Frontiers in Marine Science). http://hdl.handle.net/1956/18526 Paper IV: Wilson B, Müller O, Nordmann E-L, Seuthe L, Bratbak G and Øvreås L (2017). Changes in marine prokaryote composition with season and depth over an Arctic polar year. Front. Mar. Sci. 4:95. http://hdl.handle.net/1956/17022 Paper V: Müller O, Wilson B, Paulsen ML, Rumińska A, Armo HR, Bratbak G, Øvreås L (2018). Spatiotemporal dynamics of ammonia-oxidizing Thaumarchaeota in distinct Arctic water masses. Front. Microbiol. 9:24. http://hdl.handle.net/1956/18529 https://hdl.handle.net/1956/18525 |
op_rights |
Copyright the author. All rights reserved. |
op_doi |
https://doi.org/10.1111/1462-2920.14348 |
container_title |
Environmental Microbiology |
container_volume |
20 |
container_issue |
12 |
container_start_page |
4328 |
op_container_end_page |
4342 |
_version_ |
1766297618446548992 |
spelling |
ftunivbergen:oai:bora.uib.no:1956/18525 2023-05-15T14:25:12+02:00 Implications of a changing Arctic on microbial communities: Following the effects of thawing permafrost from land to sea Müller, Oliver 2018-06-14 application/pdf https://hdl.handle.net/1956/18525 eng eng The University of Bergen Paper I: Müller O, Bang-Andreasen T, White III RA, Elberling B, Taş N, Kneafsey T, Jansson JK, Øvreås L (2018). Disentangling the complexity of permafrost soil by using high resolution profiling of microbial community composition, key functions and respiration rates. https://doi.org/10.1111/1462-2920.14348 Paper II: Paulsen ML, Müller O, Larsen A, Møller EF, Sejr MK, Middelboe M, and Stedmon CA (2018). Biological transformation of Arctic dissolved organic matter in a NE Greenland fjord. (Manuscript under review in Limnology and Oceanography). Full-text not available. Paper III: Müller O, Seuthe L, Bratbak G, Paulsen ML (2018) Bacterial response to permafrost derived organic matter input in an Arctic fjord. (Manuscript under review in Frontiers in Marine Science). http://hdl.handle.net/1956/18526 Paper IV: Wilson B, Müller O, Nordmann E-L, Seuthe L, Bratbak G and Øvreås L (2017). Changes in marine prokaryote composition with season and depth over an Arctic polar year. Front. Mar. Sci. 4:95. http://hdl.handle.net/1956/17022 Paper V: Müller O, Wilson B, Paulsen ML, Rumińska A, Armo HR, Bratbak G, Øvreås L (2018). Spatiotemporal dynamics of ammonia-oxidizing Thaumarchaeota in distinct Arctic water masses. Front. Microbiol. 9:24. http://hdl.handle.net/1956/18529 https://hdl.handle.net/1956/18525 Copyright the author. All rights reserved. Klimaendringer Marin mikrobiologi Marine bakterier Mikrobiell økologi Permafrost Arktis https://data.ub.uio.no/realfagstermer/c030972 https://data.ub.uio.no/realfagstermer/c003160 https://data.ub.uio.no/realfagstermer/c003051 https://data.ub.uio.no/realfagstermer/c009111 https://data.ub.uio.no/realfagstermer/c013886 https://data.ub.uio.no/realfagstermer/c001406 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Doctoral thesis 2018 ftunivbergen https://doi.org/10.1111/1462-2920.14348 2023-03-14T17:43:08Z Climate change has severe impacts in the Arctic, where permafrost is thawing, glaciers are retreating and sea ice is melting. These physical changes are not only affecting large predators like polar bears, but also microscopic organisms such as Bacteria and Archaea. The impacts on microbes are far more concerning, as they are the main drivers of global biogeochemical cycles. Microbial-driven degradation of recently thawed permafrost organic matter is causing the release of critical greenhouse gases, including methane (CH4) and carbon dioxide (CO2). Parts of this formerly preserved organic carbon pool is upon thaw transported into marine systems, affecting the structure and dynamics of marine microbial communities. This thesis addresses the extensive implications of thawing permafrost on Arctic microbes. I investigated not only the microbial community composition and processes directly within the soil, but also the indirect effects of permafrost derived carbon run-off on the marine microbial structure, function and activity. By analyzing the microbial community composition, using high-throughput 16S rRNA gene sequencing, new insights on how microbial communities are structured in permafrost (Paper I), in a run-off affected fjord system (Paper II) and the Arctic Ocean (Paper IV and V) were revealed. 16S rRNA gene sequencing was also used to elucidate how permafrost derived organic matter affected the community structure and activity of coastal microbial communities (Paper III). Together, these results improve our understanding on how microbial community patterns can be used to explain biochemical processes like carbon degradation (Paper I, II, III and IV). We analyzed shifts in community composition due to climate change processes like permafrost thawing (Paper I) and carbon run-off (Paper III), thereby providing insights on which organisms and processes will be sensitive to the changes in a warmer Arctic. Permafrost is increasingly thawing, which will stimulate microbial activity, and subsequently cause the ... Doctoral or Postdoctoral Thesis Arctic Arctic microbes Arctic Arctic Ocean Arktis Arktis* Climate change Ice permafrost Sea ice University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Arctic Ocean Environmental Microbiology 20 12 4328 4342 |