Stream metabolism controls diel patterns and evasion of CO2 in Arctic streams
Streams play an important role in the global carbon (C) cycle, accounting for a large portion of CO2 evaded from inland waters despite their small areal coverage. However, the relative importance of different terrestrial and aquatic processes driving CO2 production and evasion from streams remains p...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2020
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-158880 https://doi.org/10.1111/gcb.14895 |
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ftumeauniv:oai:DiVA.org:umu-158880 2023-10-09T21:48:33+02:00 Stream metabolism controls diel patterns and evasion of CO2 in Arctic streams Rocher-Ros, Gerard Sponseller, Ryan A. Bergström, Ann-Kristin Myrstener, Maria Giesler, Reiner 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-158880 https://doi.org/10.1111/gcb.14895 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap Climate Impacts Research Centre, Umeå University, Abisko, Sweden Global Change Biology, 1354-1013, 2020, 26:3, s. 1400-1413 orcid:0000-0001-7853-2531 orcid:0000-0002-5758-2705 orcid:0000-0001-5102-4289 orcid:0000-0002-6381-4509 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-158880 doi:10.1111/gcb.14895 PMID 31667979 ISI:000499301300001 Scopus 2-s2.0-85076165577 info:eu-repo/semantics/openAccess Arctic carbon cycle carbon processing CO2 evasion stream metabolism Ecology Ekologi Geosciences Multidisciplinary Multidisciplinär geovetenskap Article in journal info:eu-repo/semantics/article text 2020 ftumeauniv https://doi.org/10.1111/gcb.14895 2023-09-22T13:58:49Z Streams play an important role in the global carbon (C) cycle, accounting for a large portion of CO2 evaded from inland waters despite their small areal coverage. However, the relative importance of different terrestrial and aquatic processes driving CO2 production and evasion from streams remains poorly understood. In this study, we measured O-2 and CO2 continuously in streams draining tundra-dominated catchments in northern Sweden, during the summers of 2015 and 2016. From this, we estimated daily metabolic rates and CO2 evasion simultaneously and thus provide insight into the role of stream metabolism as a driver of C dynamics in Arctic streams. Our results show that aquatic biological processes regulate CO2 concentrations and evasion at multiple timescales. Photosynthesis caused CO2 concentrations to decrease by as much as 900 ppm during the day, with the magnitude of this diel variation being strongest at the low-turbulence streams. Diel patterns in CO2 concentrations in turn influenced evasion, with up to 45% higher rates at night. Throughout the summer, CO2 evasion was sustained by aquatic ecosystem respiration, which was one order of magnitude higher than gross primary production. Furthermore, in most cases, the contribution of stream respiration exceeded CO2 evasion, suggesting that some stream reaches serve as net sources of CO2, thus creating longitudinal heterogeneity in C production and loss within this stream network. Overall, our results provide the first link between stream metabolism and CO2 evasion in the Arctic and demonstrate that stream metabolic processes are key drivers of the transformation and fate of terrestrial organic matter exported from these landscapes. Originally included in thesis in manuscript form. Article in Journal/Newspaper Arctic Northern Sweden Tundra Umeå University: Publications (DiVA) Arctic Global Change Biology 26 3 1400 1413 |
institution |
Open Polar |
collection |
Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Arctic carbon cycle carbon processing CO2 evasion stream metabolism Ecology Ekologi Geosciences Multidisciplinary Multidisciplinär geovetenskap |
spellingShingle |
Arctic carbon cycle carbon processing CO2 evasion stream metabolism Ecology Ekologi Geosciences Multidisciplinary Multidisciplinär geovetenskap Rocher-Ros, Gerard Sponseller, Ryan A. Bergström, Ann-Kristin Myrstener, Maria Giesler, Reiner Stream metabolism controls diel patterns and evasion of CO2 in Arctic streams |
topic_facet |
Arctic carbon cycle carbon processing CO2 evasion stream metabolism Ecology Ekologi Geosciences Multidisciplinary Multidisciplinär geovetenskap |
description |
Streams play an important role in the global carbon (C) cycle, accounting for a large portion of CO2 evaded from inland waters despite their small areal coverage. However, the relative importance of different terrestrial and aquatic processes driving CO2 production and evasion from streams remains poorly understood. In this study, we measured O-2 and CO2 continuously in streams draining tundra-dominated catchments in northern Sweden, during the summers of 2015 and 2016. From this, we estimated daily metabolic rates and CO2 evasion simultaneously and thus provide insight into the role of stream metabolism as a driver of C dynamics in Arctic streams. Our results show that aquatic biological processes regulate CO2 concentrations and evasion at multiple timescales. Photosynthesis caused CO2 concentrations to decrease by as much as 900 ppm during the day, with the magnitude of this diel variation being strongest at the low-turbulence streams. Diel patterns in CO2 concentrations in turn influenced evasion, with up to 45% higher rates at night. Throughout the summer, CO2 evasion was sustained by aquatic ecosystem respiration, which was one order of magnitude higher than gross primary production. Furthermore, in most cases, the contribution of stream respiration exceeded CO2 evasion, suggesting that some stream reaches serve as net sources of CO2, thus creating longitudinal heterogeneity in C production and loss within this stream network. Overall, our results provide the first link between stream metabolism and CO2 evasion in the Arctic and demonstrate that stream metabolic processes are key drivers of the transformation and fate of terrestrial organic matter exported from these landscapes. Originally included in thesis in manuscript form. |
format |
Article in Journal/Newspaper |
author |
Rocher-Ros, Gerard Sponseller, Ryan A. Bergström, Ann-Kristin Myrstener, Maria Giesler, Reiner |
author_facet |
Rocher-Ros, Gerard Sponseller, Ryan A. Bergström, Ann-Kristin Myrstener, Maria Giesler, Reiner |
author_sort |
Rocher-Ros, Gerard |
title |
Stream metabolism controls diel patterns and evasion of CO2 in Arctic streams |
title_short |
Stream metabolism controls diel patterns and evasion of CO2 in Arctic streams |
title_full |
Stream metabolism controls diel patterns and evasion of CO2 in Arctic streams |
title_fullStr |
Stream metabolism controls diel patterns and evasion of CO2 in Arctic streams |
title_full_unstemmed |
Stream metabolism controls diel patterns and evasion of CO2 in Arctic streams |
title_sort |
stream metabolism controls diel patterns and evasion of co2 in arctic streams |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-158880 https://doi.org/10.1111/gcb.14895 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Northern Sweden Tundra |
genre_facet |
Arctic Northern Sweden Tundra |
op_relation |
Global Change Biology, 1354-1013, 2020, 26:3, s. 1400-1413 orcid:0000-0001-7853-2531 orcid:0000-0002-5758-2705 orcid:0000-0001-5102-4289 orcid:0000-0002-6381-4509 http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-158880 doi:10.1111/gcb.14895 PMID 31667979 ISI:000499301300001 Scopus 2-s2.0-85076165577 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/gcb.14895 |
container_title |
Global Change Biology |
container_volume |
26 |
container_issue |
3 |
container_start_page |
1400 |
op_container_end_page |
1413 |
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1779311631405154304 |