Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones
Climate warming is accelerating erosion along permafrost-dominated Arctic coasts. This results in the additional supply of organic matter (OM) and nutrients into the coastal zone. In this study we investigate the impact of coastal erosion on the marine microbial community composition and growth rate...
Published in: | Frontiers in Earth Science |
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2021
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Online Access: | https://research.vu.nl/en/publications/19bb793d-4256-4569-80cc-35043a661fac https://doi.org/10.3389/feart.2021.640580 https://hdl.handle.net/1871.1/19bb793d-4256-4569-80cc-35043a661fac http://www.scopus.com/inward/record.url?scp=85104184183&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85104184183&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/19bb793d-4256-4569-80cc-35043a661fac 2024-06-23T07:48:39+00:00 Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones Bruhn, Anders Dalhoff Stedmon, Colin A. Comte, Jérôme Matsuoka, Atsushi Speetjens, Niek Jesse Tanski, George Vonk, Jorien E. Sjöstedt, Johanna 2021-03-25 https://research.vu.nl/en/publications/19bb793d-4256-4569-80cc-35043a661fac https://doi.org/10.3389/feart.2021.640580 https://hdl.handle.net/1871.1/19bb793d-4256-4569-80cc-35043a661fac http://www.scopus.com/inward/record.url?scp=85104184183&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85104184183&partnerID=8YFLogxK eng eng https://research.vu.nl/en/publications/19bb793d-4256-4569-80cc-35043a661fac info:eu-repo/semantics/openAccess Bruhn , A D , Stedmon , C A , Comte , J , Matsuoka , A , Speetjens , N J , Tanski , G , Vonk , J E & Sjöstedt , J 2021 , ' Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones ' , Frontiers in Earth Science , vol. 9 , no. March , 640580 , pp. 1-20 . https://doi.org/10.3389/feart.2021.640580 Arctic coastal zone chemostat climate change glacial deposits marine microbial community permafrost terrestrial dissolved organic matter /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2021 ftvuamstcris https://doi.org/10.3389/feart.2021.640580 2024-06-13T00:27:56Z Climate warming is accelerating erosion along permafrost-dominated Arctic coasts. This results in the additional supply of organic matter (OM) and nutrients into the coastal zone. In this study we investigate the impact of coastal erosion on the marine microbial community composition and growth rates in the coastal Beaufort Sea. Dissolved organic matter (DOM) derived from three representative glacial deposit types (fluvial, lacustrine, and moraine) along the Yukon coastal plain, Canada, were used as substrate to cultivate marine bacteria using a chemostat setup. Our results show that DOM composition (inferred from UV-Visible spectroscopy) and biodegradability (inferred from DOC concentration, bacterial production and respiration) significantly differ between the three glacial deposit types. DOM derived from fluvial and moraine types show clear terrestrial characteristics with low aromaticity (S r : 0.63 ± 0.02 and SUVA 254 : 1.65 ± 0.06 L mg C −1 m −1 & S r : 0.68 ± 0.01 and SUVA 254 : 1.17 ± 0.06 L mg C −1 m −1 , respectively) compared to the lacustrine soil type (S r : 0.71 ± 0.02 and SUVA 254 : 2.15 ± 0.05 L mg C −1 m −1 ). The difference in composition of DOM leads to the development of three different microbial communities. Whereas Alphaproteobacteria dominate in fluvial and lacustrine deposit types (67 and 87% relative abundance, respectively), Gammaproteobacteria is the most abundant class for moraine deposit type (88% relative abundance). Bacterial growth efficiency (BGE) is 66% for DOM from moraine deposit type, while 13 and 28% for DOM from fluvial and lacustrine deposit types, respectively. The three microbial communities therefore differ strongly in their net effect on DOM utilization depending on the eroded landscape type. The high BGE value for moraine-derived DOM is probably caused by a larger proportion of labile colorless DOM. These results indicate that the substrate controls marine microbial community composition and activities in coastal waters. This suggests that biogeochemical changes ... Article in Journal/Newspaper Arctic Arctic Beaufort Sea Climate change permafrost Yukon Vrije Universiteit Amsterdam (VU): Research Portal Arctic Canada Yukon Frontiers in Earth Science 9 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
Arctic coastal zone chemostat climate change glacial deposits marine microbial community permafrost terrestrial dissolved organic matter /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Arctic coastal zone chemostat climate change glacial deposits marine microbial community permafrost terrestrial dissolved organic matter /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Bruhn, Anders Dalhoff Stedmon, Colin A. Comte, Jérôme Matsuoka, Atsushi Speetjens, Niek Jesse Tanski, George Vonk, Jorien E. Sjöstedt, Johanna Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones |
topic_facet |
Arctic coastal zone chemostat climate change glacial deposits marine microbial community permafrost terrestrial dissolved organic matter /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
Climate warming is accelerating erosion along permafrost-dominated Arctic coasts. This results in the additional supply of organic matter (OM) and nutrients into the coastal zone. In this study we investigate the impact of coastal erosion on the marine microbial community composition and growth rates in the coastal Beaufort Sea. Dissolved organic matter (DOM) derived from three representative glacial deposit types (fluvial, lacustrine, and moraine) along the Yukon coastal plain, Canada, were used as substrate to cultivate marine bacteria using a chemostat setup. Our results show that DOM composition (inferred from UV-Visible spectroscopy) and biodegradability (inferred from DOC concentration, bacterial production and respiration) significantly differ between the three glacial deposit types. DOM derived from fluvial and moraine types show clear terrestrial characteristics with low aromaticity (S r : 0.63 ± 0.02 and SUVA 254 : 1.65 ± 0.06 L mg C −1 m −1 & S r : 0.68 ± 0.01 and SUVA 254 : 1.17 ± 0.06 L mg C −1 m −1 , respectively) compared to the lacustrine soil type (S r : 0.71 ± 0.02 and SUVA 254 : 2.15 ± 0.05 L mg C −1 m −1 ). The difference in composition of DOM leads to the development of three different microbial communities. Whereas Alphaproteobacteria dominate in fluvial and lacustrine deposit types (67 and 87% relative abundance, respectively), Gammaproteobacteria is the most abundant class for moraine deposit type (88% relative abundance). Bacterial growth efficiency (BGE) is 66% for DOM from moraine deposit type, while 13 and 28% for DOM from fluvial and lacustrine deposit types, respectively. The three microbial communities therefore differ strongly in their net effect on DOM utilization depending on the eroded landscape type. The high BGE value for moraine-derived DOM is probably caused by a larger proportion of labile colorless DOM. These results indicate that the substrate controls marine microbial community composition and activities in coastal waters. This suggests that biogeochemical changes ... |
format |
Article in Journal/Newspaper |
author |
Bruhn, Anders Dalhoff Stedmon, Colin A. Comte, Jérôme Matsuoka, Atsushi Speetjens, Niek Jesse Tanski, George Vonk, Jorien E. Sjöstedt, Johanna |
author_facet |
Bruhn, Anders Dalhoff Stedmon, Colin A. Comte, Jérôme Matsuoka, Atsushi Speetjens, Niek Jesse Tanski, George Vonk, Jorien E. Sjöstedt, Johanna |
author_sort |
Bruhn, Anders Dalhoff |
title |
Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones |
title_short |
Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones |
title_full |
Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones |
title_fullStr |
Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones |
title_full_unstemmed |
Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones |
title_sort |
terrestrial dissolved organic matter mobilized from eroding permafrost controls microbial community composition and growth in arctic coastal zones |
publishDate |
2021 |
url |
https://research.vu.nl/en/publications/19bb793d-4256-4569-80cc-35043a661fac https://doi.org/10.3389/feart.2021.640580 https://hdl.handle.net/1871.1/19bb793d-4256-4569-80cc-35043a661fac http://www.scopus.com/inward/record.url?scp=85104184183&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=85104184183&partnerID=8YFLogxK |
geographic |
Arctic Canada Yukon |
geographic_facet |
Arctic Canada Yukon |
genre |
Arctic Arctic Beaufort Sea Climate change permafrost Yukon |
genre_facet |
Arctic Arctic Beaufort Sea Climate change permafrost Yukon |
op_source |
Bruhn , A D , Stedmon , C A , Comte , J , Matsuoka , A , Speetjens , N J , Tanski , G , Vonk , J E & Sjöstedt , J 2021 , ' Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones ' , Frontiers in Earth Science , vol. 9 , no. March , 640580 , pp. 1-20 . https://doi.org/10.3389/feart.2021.640580 |
op_relation |
https://research.vu.nl/en/publications/19bb793d-4256-4569-80cc-35043a661fac |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/feart.2021.640580 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
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1802638988031295488 |