Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis
International audience As Arctic regions warm and frozen soils thaw, the large organic carbon pool stored in permafrost becomes increasingly vulnerable to decomposition or transport. The transfer of newly mobilized carbon to the atmosphere and its potential influence upon climate change will largely...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2015
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Online Access: | https://univ-rennes.hal.science/hal-01255870 https://univ-rennes.hal.science/hal-01255870/document https://univ-rennes.hal.science/hal-01255870/file/bg-12-6915-2015.pdf https://doi.org/10.5194/bg-12-6915-2015 |
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Institut national des sciences de l'Univers: HAL-INSU |
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[SDV]Life Sciences [q-bio] |
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[SDV]Life Sciences [q-bio] Vonk, Jorien E. Tank, Suzanne E. Mann, Paul J. Spencer, Robert G.M. Treat, Claire C. Striegl, Robert G. Abbott, Benjamin W. Wickland, Kimberly P. Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis |
topic_facet |
[SDV]Life Sciences [q-bio] |
description |
International audience As Arctic regions warm and frozen soils thaw, the large organic carbon pool stored in permafrost becomes increasingly vulnerable to decomposition or transport. The transfer of newly mobilized carbon to the atmosphere and its potential influence upon climate change will largely depend on the degradability of carbon delivered to aquatic ecosystems. Dissolved organic carbon (DOC) is a key regulator of aquatic metabolism, yet knowledge of the mechanistic controls on DOC biodegradability is currently poor due to a scarcity of long-term data sets, limited spatial coverage of available data, and methodological diversity. Here, we performed parallel biodegradable DOC (BDOC) experiments at six Arctic sites (16 experiments) using a standardized incubation protocol to examine the effect of methodological differences commonly used in the literature. We also synthesized results from 14 aquatic and soil leachate BDOC studies from across the circum-arctic permafrost region to examine pan-arctic trends in BDOC. An increasing extent of permafrost across the landscape resulted in higher DOC losses in both soil and aquatic systems. We hypothesize that the unique composition of (yedoma) permafrost-derived DOC combined with limited prior microbial processing due to low soil temperature and relatively short flow path lengths and transport times, contributed to a higher overall terrestrial and freshwater DOC loss. Additionally, we found that the fraction of BDOC decreased moving down the fluvial network in continuous permafrost regions, i.e. from streams to large rivers, suggesting that highly biodegradable DOC is lost in headwater streams. We also observed a seasonal (January–December) decrease in BDOC in large streams and rivers, but saw no apparent change in smaller streams or soil leachates. We attribute this seasonal change to a combination of factors including shifts in carbon source, changing DOC residence time related to increasing thaw-depth, increasing water temperatures later in the summer, as well ... |
author2 |
Department of Earth Sciences Utrecht Universiteit Utrecht / Utrecht University Utrecht Arctic Center University of Groningen Groningen Department of Biological Sciences University of Alberta Department of Geography University of Northumbria at Newcastle United Kingdom Ecosystèmes, biodiversité, évolution Rennes (ECOBIO) Université de Rennes (UR)-Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Vonk, Jorien E. Tank, Suzanne E. Mann, Paul J. Spencer, Robert G.M. Treat, Claire C. Striegl, Robert G. Abbott, Benjamin W. Wickland, Kimberly P. |
author_facet |
Vonk, Jorien E. Tank, Suzanne E. Mann, Paul J. Spencer, Robert G.M. Treat, Claire C. Striegl, Robert G. Abbott, Benjamin W. Wickland, Kimberly P. |
author_sort |
Vonk, Jorien E. |
title |
Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis |
title_short |
Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis |
title_full |
Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis |
title_fullStr |
Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis |
title_full_unstemmed |
Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis |
title_sort |
biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://univ-rennes.hal.science/hal-01255870 https://univ-rennes.hal.science/hal-01255870/document https://univ-rennes.hal.science/hal-01255870/file/bg-12-6915-2015.pdf https://doi.org/10.5194/bg-12-6915-2015 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://univ-rennes.hal.science/hal-01255870 Biogeosciences, 2015, 12 (23), pp.6915--6930. ⟨10.5194/bg-12-6915-2015⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-6915-2015 hal-01255870 https://univ-rennes.hal.science/hal-01255870 https://univ-rennes.hal.science/hal-01255870/document https://univ-rennes.hal.science/hal-01255870/file/bg-12-6915-2015.pdf doi:10.5194/bg-12-6915-2015 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-12-6915-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
23 |
container_start_page |
6915 |
op_container_end_page |
6930 |
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1790596416104562688 |
spelling |
ftinsu:oai:HAL:hal-01255870v1 2024-02-11T10:00:42+01:00 Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysis Vonk, Jorien E. Tank, Suzanne E. Mann, Paul J. Spencer, Robert G.M. Treat, Claire C. Striegl, Robert G. Abbott, Benjamin W. Wickland, Kimberly P. Department of Earth Sciences Utrecht Universiteit Utrecht / Utrecht University Utrecht Arctic Center University of Groningen Groningen Department of Biological Sciences University of Alberta Department of Geography University of Northumbria at Newcastle United Kingdom Ecosystèmes, biodiversité, évolution Rennes (ECOBIO) Université de Rennes (UR)-Institut Ecologie et Environnement - CNRS Ecologie et Environnement (INEE-CNRS) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) 2015 https://univ-rennes.hal.science/hal-01255870 https://univ-rennes.hal.science/hal-01255870/document https://univ-rennes.hal.science/hal-01255870/file/bg-12-6915-2015.pdf https://doi.org/10.5194/bg-12-6915-2015 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-12-6915-2015 hal-01255870 https://univ-rennes.hal.science/hal-01255870 https://univ-rennes.hal.science/hal-01255870/document https://univ-rennes.hal.science/hal-01255870/file/bg-12-6915-2015.pdf doi:10.5194/bg-12-6915-2015 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://univ-rennes.hal.science/hal-01255870 Biogeosciences, 2015, 12 (23), pp.6915--6930. ⟨10.5194/bg-12-6915-2015⟩ [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2015 ftinsu https://doi.org/10.5194/bg-12-6915-2015 2024-01-24T17:29:23Z International audience As Arctic regions warm and frozen soils thaw, the large organic carbon pool stored in permafrost becomes increasingly vulnerable to decomposition or transport. The transfer of newly mobilized carbon to the atmosphere and its potential influence upon climate change will largely depend on the degradability of carbon delivered to aquatic ecosystems. Dissolved organic carbon (DOC) is a key regulator of aquatic metabolism, yet knowledge of the mechanistic controls on DOC biodegradability is currently poor due to a scarcity of long-term data sets, limited spatial coverage of available data, and methodological diversity. Here, we performed parallel biodegradable DOC (BDOC) experiments at six Arctic sites (16 experiments) using a standardized incubation protocol to examine the effect of methodological differences commonly used in the literature. We also synthesized results from 14 aquatic and soil leachate BDOC studies from across the circum-arctic permafrost region to examine pan-arctic trends in BDOC. An increasing extent of permafrost across the landscape resulted in higher DOC losses in both soil and aquatic systems. We hypothesize that the unique composition of (yedoma) permafrost-derived DOC combined with limited prior microbial processing due to low soil temperature and relatively short flow path lengths and transport times, contributed to a higher overall terrestrial and freshwater DOC loss. Additionally, we found that the fraction of BDOC decreased moving down the fluvial network in continuous permafrost regions, i.e. from streams to large rivers, suggesting that highly biodegradable DOC is lost in headwater streams. We also observed a seasonal (January–December) decrease in BDOC in large streams and rivers, but saw no apparent change in smaller streams or soil leachates. We attribute this seasonal change to a combination of factors including shifts in carbon source, changing DOC residence time related to increasing thaw-depth, increasing water temperatures later in the summer, as well ... Article in Journal/Newspaper Arctic Climate change permafrost Institut national des sciences de l'Univers: HAL-INSU Arctic Biogeosciences 12 23 6915 6930 |