Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects
Permafrost degradation is delivering bioavailable dissolved organic matter (DOM) and inorganic nutrients to surface water networks. While these permafrost subsidies represent a small portion of total fluvial DOM and nutrient fluxes, they could influence food webs and net ecosystem carbon balance via...
Published in: | Global Biogeochemical Cycles |
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2021
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Online Access: | https://hdl.handle.net/1983/0a7b42d8-4b07-4fd1-9171-02d97c3de481 https://research-information.bris.ac.uk/en/publications/0a7b42d8-4b07-4fd1-9171-02d97c3de481 https://doi.org/10.1029/2020GB006719 http://www.scopus.com/inward/record.url?scp=85099928620&partnerID=8YFLogxK |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/0a7b42d8-4b07-4fd1-9171-02d97c3de481 2024-05-19T07:47:03+00:00 Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects Wologo, Ethan Shakil, Sarah Zolkos, Scott Textor, Sadie Ewing, Stephanie Klassen, Jane Spencer, Robert G.M. Podgorski, David C. Tank, Suzanne E. Baker, Michelle A. O'Donnell, Jonathan A. Wickland, Kimberly P. Foks, Sydney S.W. Zarnetske, Jay P. Lee-Cullin, Joseph Liu, Futing Yang, Yuanhe Kortelainen, Pirkko Kolehmainen, Jaana Dean, Joshua F. Vonk, Jorien E. Holmes, Robert M. Pinay, Gilles Powell, Michaela M. Howe, Jansen Frei, Rebecca J. Bratsman, Samuel P. Abbott, Benjamin W. 2021-01-11 https://hdl.handle.net/1983/0a7b42d8-4b07-4fd1-9171-02d97c3de481 https://research-information.bris.ac.uk/en/publications/0a7b42d8-4b07-4fd1-9171-02d97c3de481 https://doi.org/10.1029/2020GB006719 http://www.scopus.com/inward/record.url?scp=85099928620&partnerID=8YFLogxK eng eng https://research-information.bris.ac.uk/en/publications/0a7b42d8-4b07-4fd1-9171-02d97c3de481 info:eu-repo/semantics/openAccess Wologo , E , Shakil , S , Zolkos , S , Textor , S , Ewing , S , Klassen , J , Spencer , R G M , Podgorski , D C , Tank , S E , Baker , M A , O'Donnell , J A , Wickland , K P , Foks , S S W , Zarnetske , J P , Lee-Cullin , J , Liu , F , Yang , Y , Kortelainen , P , Kolehmainen , J , Dean , J F , Vonk , J E , Holmes , R M , Pinay , G , Powell , M M , Howe , J , Frei , R J , Bratsman , S P & Abbott , B W 2021 , ' Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects ' , Global Biogeochemical Cycles , vol. 35 , no. 1 , e2020GB006719 . https://doi.org/10.1029/2020GB006719 carbon cycling cryosphere and high-latitude processes nutrients and nutrient cycling permafrost rivers thermokarst article 2021 ftubristolcris https://doi.org/10.1029/2020GB006719 2024-05-01T00:00:41Z Permafrost degradation is delivering bioavailable dissolved organic matter (DOM) and inorganic nutrients to surface water networks. While these permafrost subsidies represent a small portion of total fluvial DOM and nutrient fluxes, they could influence food webs and net ecosystem carbon balance via priming or nutrient effects that destabilize background DOM. We investigated how addition of biolabile carbon (acetate) and inorganic nutrients (nitrogen and phosphorus) affected DOM decomposition with 28-day incubations. We incubated late-summer stream water from 23 locations nested in seven northern or high-altitude regions in Asia, Europe, and North America. DOM loss ranged from 3% to 52%, showing a variety of longitudinal patterns within stream networks. DOM optical properties varied widely, but DOM showed compositional similarity based on Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis. Addition of acetate and nutrients decreased bulk DOM mineralization (i.e., negative priming), with more negative effects on biodegradable DOM but neutral or positive effects on stable DOM. Unexpectedly, acetate and nutrients triggered breakdown of colored DOM (CDOM), with median decreases of 1.6% in the control and 22% in the amended treatment. Additionally, the uptake of added acetate was strongly limited by nutrient availability across sites. These findings suggest that biolabile DOM and nutrients released from degrading permafrost may decrease background DOM mineralization but alter stoichiometry and light conditions in receiving waterbodies. We conclude that priming and nutrient effects are coupled in northern aquatic ecosystems and that quantifying two-way interactions between DOM properties and environmental conditions could resolve conflicting observations about the drivers of DOM in permafrost zone waterways. Article in Journal/Newspaper permafrost Thermokarst University of Bristol: Bristol Research Global Biogeochemical Cycles 35 1 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
topic |
carbon cycling cryosphere and high-latitude processes nutrients and nutrient cycling permafrost rivers thermokarst |
spellingShingle |
carbon cycling cryosphere and high-latitude processes nutrients and nutrient cycling permafrost rivers thermokarst Wologo, Ethan Shakil, Sarah Zolkos, Scott Textor, Sadie Ewing, Stephanie Klassen, Jane Spencer, Robert G.M. Podgorski, David C. Tank, Suzanne E. Baker, Michelle A. O'Donnell, Jonathan A. Wickland, Kimberly P. Foks, Sydney S.W. Zarnetske, Jay P. Lee-Cullin, Joseph Liu, Futing Yang, Yuanhe Kortelainen, Pirkko Kolehmainen, Jaana Dean, Joshua F. Vonk, Jorien E. Holmes, Robert M. Pinay, Gilles Powell, Michaela M. Howe, Jansen Frei, Rebecca J. Bratsman, Samuel P. Abbott, Benjamin W. Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects |
topic_facet |
carbon cycling cryosphere and high-latitude processes nutrients and nutrient cycling permafrost rivers thermokarst |
description |
Permafrost degradation is delivering bioavailable dissolved organic matter (DOM) and inorganic nutrients to surface water networks. While these permafrost subsidies represent a small portion of total fluvial DOM and nutrient fluxes, they could influence food webs and net ecosystem carbon balance via priming or nutrient effects that destabilize background DOM. We investigated how addition of biolabile carbon (acetate) and inorganic nutrients (nitrogen and phosphorus) affected DOM decomposition with 28-day incubations. We incubated late-summer stream water from 23 locations nested in seven northern or high-altitude regions in Asia, Europe, and North America. DOM loss ranged from 3% to 52%, showing a variety of longitudinal patterns within stream networks. DOM optical properties varied widely, but DOM showed compositional similarity based on Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis. Addition of acetate and nutrients decreased bulk DOM mineralization (i.e., negative priming), with more negative effects on biodegradable DOM but neutral or positive effects on stable DOM. Unexpectedly, acetate and nutrients triggered breakdown of colored DOM (CDOM), with median decreases of 1.6% in the control and 22% in the amended treatment. Additionally, the uptake of added acetate was strongly limited by nutrient availability across sites. These findings suggest that biolabile DOM and nutrients released from degrading permafrost may decrease background DOM mineralization but alter stoichiometry and light conditions in receiving waterbodies. We conclude that priming and nutrient effects are coupled in northern aquatic ecosystems and that quantifying two-way interactions between DOM properties and environmental conditions could resolve conflicting observations about the drivers of DOM in permafrost zone waterways. |
format |
Article in Journal/Newspaper |
author |
Wologo, Ethan Shakil, Sarah Zolkos, Scott Textor, Sadie Ewing, Stephanie Klassen, Jane Spencer, Robert G.M. Podgorski, David C. Tank, Suzanne E. Baker, Michelle A. O'Donnell, Jonathan A. Wickland, Kimberly P. Foks, Sydney S.W. Zarnetske, Jay P. Lee-Cullin, Joseph Liu, Futing Yang, Yuanhe Kortelainen, Pirkko Kolehmainen, Jaana Dean, Joshua F. Vonk, Jorien E. Holmes, Robert M. Pinay, Gilles Powell, Michaela M. Howe, Jansen Frei, Rebecca J. Bratsman, Samuel P. Abbott, Benjamin W. |
author_facet |
Wologo, Ethan Shakil, Sarah Zolkos, Scott Textor, Sadie Ewing, Stephanie Klassen, Jane Spencer, Robert G.M. Podgorski, David C. Tank, Suzanne E. Baker, Michelle A. O'Donnell, Jonathan A. Wickland, Kimberly P. Foks, Sydney S.W. Zarnetske, Jay P. Lee-Cullin, Joseph Liu, Futing Yang, Yuanhe Kortelainen, Pirkko Kolehmainen, Jaana Dean, Joshua F. Vonk, Jorien E. Holmes, Robert M. Pinay, Gilles Powell, Michaela M. Howe, Jansen Frei, Rebecca J. Bratsman, Samuel P. Abbott, Benjamin W. |
author_sort |
Wologo, Ethan |
title |
Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects |
title_short |
Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects |
title_full |
Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects |
title_fullStr |
Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects |
title_full_unstemmed |
Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects |
title_sort |
stream dissolved organic matter in permafrost regions shows surprising compositional similarities but negative priming and nutrient effects |
publishDate |
2021 |
url |
https://hdl.handle.net/1983/0a7b42d8-4b07-4fd1-9171-02d97c3de481 https://research-information.bris.ac.uk/en/publications/0a7b42d8-4b07-4fd1-9171-02d97c3de481 https://doi.org/10.1029/2020GB006719 http://www.scopus.com/inward/record.url?scp=85099928620&partnerID=8YFLogxK |
genre |
permafrost Thermokarst |
genre_facet |
permafrost Thermokarst |
op_source |
Wologo , E , Shakil , S , Zolkos , S , Textor , S , Ewing , S , Klassen , J , Spencer , R G M , Podgorski , D C , Tank , S E , Baker , M A , O'Donnell , J A , Wickland , K P , Foks , S S W , Zarnetske , J P , Lee-Cullin , J , Liu , F , Yang , Y , Kortelainen , P , Kolehmainen , J , Dean , J F , Vonk , J E , Holmes , R M , Pinay , G , Powell , M M , Howe , J , Frei , R J , Bratsman , S P & Abbott , B W 2021 , ' Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects ' , Global Biogeochemical Cycles , vol. 35 , no. 1 , e2020GB006719 . https://doi.org/10.1029/2020GB006719 |
op_relation |
https://research-information.bris.ac.uk/en/publications/0a7b42d8-4b07-4fd1-9171-02d97c3de481 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020GB006719 |
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