Aged soils contribute little to contemporary carbon cycling downstream of thawing permafrost peatlands
Funder: Department for Business, Energy and Industrial Strategy, UK Government; Id: http://dx.doi.org/10.13039/100011693 Abstract: Vast stores of millennial‐aged soil carbon (MSC) in permafrost peatlands risk leaching into the contemporary carbon cycle after thaw caused by climate warming or increas...
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Global Change Biology
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ftunivcam:oai:www.repository.cam.ac.uk:1810/325542 2023-10-29T02:34:30+01:00 Aged soils contribute little to contemporary carbon cycling downstream of thawing permafrost peatlands Tanentzap, Andrew J. Burd, Katheryn Kuhn, McKenzie Estop‐Aragonés, Cristian Tank, Suzanne E. Olefeldt, David 2021-07-28T09:02:43Z application/pdf text/xml https://www.repository.cam.ac.uk/handle/1810/325542 https://doi.org/10.17863/CAM.72999 en eng Global Change Biology https://www.repository.cam.ac.uk/handle/1810/325542 doi:10.17863/CAM.72999 PRIMARY RESEARCH ARTICLE boreal carbon cycling disturbance food webs permafrost peatlands streams terrestrial–aquatic linkages Article 2021 ftunivcam https://doi.org/10.17863/CAM.72999 2023-10-05T22:19:44Z Funder: Department for Business, Energy and Industrial Strategy, UK Government; Id: http://dx.doi.org/10.13039/100011693 Abstract: Vast stores of millennial‐aged soil carbon (MSC) in permafrost peatlands risk leaching into the contemporary carbon cycle after thaw caused by climate warming or increased wildfire activity. Here we tracked the export and downstream fate of MSC from two peatland‐dominated catchments in subarctic Canada, one of which was recently affected by wildlife. We tested whether thermokarst bog expansion and deepening of seasonally thawed soils due to wildfire increased the contributions of MSC to downstream waters. Despite being available for lateral transport, MSC accounted for ≤6% of dissolved organic carbon (DOC) pools at catchment outlets. Assimilation of MSC into the aquatic food web could not explain its absence at the outlets. Using δ13C‐Δ14C‐δ15N‐δ2H measurements, we estimated only 7% of consumer biomass came from MSC by direct assimilation and algal recycling of heterotrophic respiration. Recent wildfire that caused seasonally thawed soils to reach twice as deep in one catchment did not change these results. In contrast to many other Arctic ecosystems undergoing climate warming, we suggest waterlogged peatlands will protect against downstream delivery and transformation of MSC after climate‐ and wildfire‐induced permafrost thaw. Article in Journal/Newspaper Arctic permafrost Subarctic Thermokarst Apollo - University of Cambridge Repository |
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Open Polar |
collection |
Apollo - University of Cambridge Repository |
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ftunivcam |
language |
English |
topic |
PRIMARY RESEARCH ARTICLE boreal carbon cycling disturbance food webs permafrost peatlands streams terrestrial–aquatic linkages |
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PRIMARY RESEARCH ARTICLE boreal carbon cycling disturbance food webs permafrost peatlands streams terrestrial–aquatic linkages Tanentzap, Andrew J. Burd, Katheryn Kuhn, McKenzie Estop‐Aragonés, Cristian Tank, Suzanne E. Olefeldt, David Aged soils contribute little to contemporary carbon cycling downstream of thawing permafrost peatlands |
topic_facet |
PRIMARY RESEARCH ARTICLE boreal carbon cycling disturbance food webs permafrost peatlands streams terrestrial–aquatic linkages |
description |
Funder: Department for Business, Energy and Industrial Strategy, UK Government; Id: http://dx.doi.org/10.13039/100011693 Abstract: Vast stores of millennial‐aged soil carbon (MSC) in permafrost peatlands risk leaching into the contemporary carbon cycle after thaw caused by climate warming or increased wildfire activity. Here we tracked the export and downstream fate of MSC from two peatland‐dominated catchments in subarctic Canada, one of which was recently affected by wildlife. We tested whether thermokarst bog expansion and deepening of seasonally thawed soils due to wildfire increased the contributions of MSC to downstream waters. Despite being available for lateral transport, MSC accounted for ≤6% of dissolved organic carbon (DOC) pools at catchment outlets. Assimilation of MSC into the aquatic food web could not explain its absence at the outlets. Using δ13C‐Δ14C‐δ15N‐δ2H measurements, we estimated only 7% of consumer biomass came from MSC by direct assimilation and algal recycling of heterotrophic respiration. Recent wildfire that caused seasonally thawed soils to reach twice as deep in one catchment did not change these results. In contrast to many other Arctic ecosystems undergoing climate warming, we suggest waterlogged peatlands will protect against downstream delivery and transformation of MSC after climate‐ and wildfire‐induced permafrost thaw. |
format |
Article in Journal/Newspaper |
author |
Tanentzap, Andrew J. Burd, Katheryn Kuhn, McKenzie Estop‐Aragonés, Cristian Tank, Suzanne E. Olefeldt, David |
author_facet |
Tanentzap, Andrew J. Burd, Katheryn Kuhn, McKenzie Estop‐Aragonés, Cristian Tank, Suzanne E. Olefeldt, David |
author_sort |
Tanentzap, Andrew J. |
title |
Aged soils contribute little to contemporary carbon cycling downstream of thawing permafrost peatlands |
title_short |
Aged soils contribute little to contemporary carbon cycling downstream of thawing permafrost peatlands |
title_full |
Aged soils contribute little to contemporary carbon cycling downstream of thawing permafrost peatlands |
title_fullStr |
Aged soils contribute little to contemporary carbon cycling downstream of thawing permafrost peatlands |
title_full_unstemmed |
Aged soils contribute little to contemporary carbon cycling downstream of thawing permafrost peatlands |
title_sort |
aged soils contribute little to contemporary carbon cycling downstream of thawing permafrost peatlands |
publisher |
Global Change Biology |
publishDate |
2021 |
url |
https://www.repository.cam.ac.uk/handle/1810/325542 https://doi.org/10.17863/CAM.72999 |
genre |
Arctic permafrost Subarctic Thermokarst |
genre_facet |
Arctic permafrost Subarctic Thermokarst |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/325542 doi:10.17863/CAM.72999 |
op_doi |
https://doi.org/10.17863/CAM.72999 |
_version_ |
1781057133126615040 |