Responses of surface SOC to long‐term experimental warming vary between different heath types in the high Arctic tundra
Abstract Over the past few decades the Arctic has warmed up more than the lower latitudes. Soil organic carbon (SOC) in the Arctic is vulnerable to climate change, and carbon dioxide (CO 2 ) produced via SOC decomposition can amplify atmospheric temperature increase. Although SOC composition is rele...
Published in: | European Journal of Soil Science |
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Online Access: | http://dx.doi.org/10.1111/ejss.12896 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fejss.12896 http://onlinelibrary.wiley.com/wol1/doi/10.1111/ejss.12896/fullpdf |
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crwiley:10.1111/ejss.12896 2024-09-15T18:02:14+00:00 Responses of surface SOC to long‐term experimental warming vary between different heath types in the high Arctic tundra Jung, Ji Young Michelsen, Anders Kim, Mincheol Nam, Sungjin Schmidt, Niels M. Jeong, Sujeong Choe, Yong‐Hoe Lee, Bang Yong Yoon, Ho Il Lee, Yoo Kyung Danmarks Grundforskningsfond National Research Foundation of Korea 2020 http://dx.doi.org/10.1111/ejss.12896 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fejss.12896 http://onlinelibrary.wiley.com/wol1/doi/10.1111/ejss.12896/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor European Journal of Soil Science volume 71, issue 4, page 752-767 ISSN 1351-0754 1365-2389 journal-article 2020 crwiley https://doi.org/10.1111/ejss.12896 2024-08-13T04:13:27Z Abstract Over the past few decades the Arctic has warmed up more than the lower latitudes. Soil organic carbon (SOC) in the Arctic is vulnerable to climate change, and carbon dioxide (CO 2 ) produced via SOC decomposition can amplify atmospheric temperature increase. Although SOC composition is relevant to decomposability, studies on its compositional changes with warming are scarce, particularly in the Arctic. Therefore, we investigated the responses of SOC and the bacterial community to climate manipulation under Cassiope and Salix heath vegetation communities in permafrost‐affected soil in Zackenberg, Greenland. After 8–9 years of experimental warming, we evaluated changes in SOC quantity and quality of three density fractions of soil: free light fraction (FLF), occluded light fraction (OLF) and heavy fraction (HF). The SOC content at 0–5‐cm depth was significantly reduced with warming under Cassiope , and it was accompanied by decreased FLF content, attributed to accelerated decomposition of the FLF by warming. However, SOC molecular composition and bacterial community composition were not affected by warming. By contrast, there was no warming effect on SOC under Salix , which could be partially due to smaller temperature increases caused by higher moisture levels associated with larger silt and clay contents, or to different responses of the dominant plant species to temperature. In both soils, more than 55% of SOC was associated with minerals, and its molecular composition indicated microbial decomposition. Our results suggested that long‐term warming in the high Arctic could induce the loss of SOC, particularly in the FLF; however, the response could vary with vegetation type and/or soil properties, that is, soil texture. Highlights We show decreased SOC with long‐term (8‐year) warming of heath soils in the high Arctic Particularly, the free light fraction of SOC in topsoil decreased with warming in a Cassiope heath site Mineral‐associated SOC content was more than 55% and showed signs of microbial ... Article in Journal/Newspaper Climate change Greenland permafrost Tundra Zackenberg Wiley Online Library European Journal of Soil Science 71 4 752 767 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Over the past few decades the Arctic has warmed up more than the lower latitudes. Soil organic carbon (SOC) in the Arctic is vulnerable to climate change, and carbon dioxide (CO 2 ) produced via SOC decomposition can amplify atmospheric temperature increase. Although SOC composition is relevant to decomposability, studies on its compositional changes with warming are scarce, particularly in the Arctic. Therefore, we investigated the responses of SOC and the bacterial community to climate manipulation under Cassiope and Salix heath vegetation communities in permafrost‐affected soil in Zackenberg, Greenland. After 8–9 years of experimental warming, we evaluated changes in SOC quantity and quality of three density fractions of soil: free light fraction (FLF), occluded light fraction (OLF) and heavy fraction (HF). The SOC content at 0–5‐cm depth was significantly reduced with warming under Cassiope , and it was accompanied by decreased FLF content, attributed to accelerated decomposition of the FLF by warming. However, SOC molecular composition and bacterial community composition were not affected by warming. By contrast, there was no warming effect on SOC under Salix , which could be partially due to smaller temperature increases caused by higher moisture levels associated with larger silt and clay contents, or to different responses of the dominant plant species to temperature. In both soils, more than 55% of SOC was associated with minerals, and its molecular composition indicated microbial decomposition. Our results suggested that long‐term warming in the high Arctic could induce the loss of SOC, particularly in the FLF; however, the response could vary with vegetation type and/or soil properties, that is, soil texture. Highlights We show decreased SOC with long‐term (8‐year) warming of heath soils in the high Arctic Particularly, the free light fraction of SOC in topsoil decreased with warming in a Cassiope heath site Mineral‐associated SOC content was more than 55% and showed signs of microbial ... |
author2 |
Danmarks Grundforskningsfond National Research Foundation of Korea |
format |
Article in Journal/Newspaper |
author |
Jung, Ji Young Michelsen, Anders Kim, Mincheol Nam, Sungjin Schmidt, Niels M. Jeong, Sujeong Choe, Yong‐Hoe Lee, Bang Yong Yoon, Ho Il Lee, Yoo Kyung |
spellingShingle |
Jung, Ji Young Michelsen, Anders Kim, Mincheol Nam, Sungjin Schmidt, Niels M. Jeong, Sujeong Choe, Yong‐Hoe Lee, Bang Yong Yoon, Ho Il Lee, Yoo Kyung Responses of surface SOC to long‐term experimental warming vary between different heath types in the high Arctic tundra |
author_facet |
Jung, Ji Young Michelsen, Anders Kim, Mincheol Nam, Sungjin Schmidt, Niels M. Jeong, Sujeong Choe, Yong‐Hoe Lee, Bang Yong Yoon, Ho Il Lee, Yoo Kyung |
author_sort |
Jung, Ji Young |
title |
Responses of surface SOC to long‐term experimental warming vary between different heath types in the high Arctic tundra |
title_short |
Responses of surface SOC to long‐term experimental warming vary between different heath types in the high Arctic tundra |
title_full |
Responses of surface SOC to long‐term experimental warming vary between different heath types in the high Arctic tundra |
title_fullStr |
Responses of surface SOC to long‐term experimental warming vary between different heath types in the high Arctic tundra |
title_full_unstemmed |
Responses of surface SOC to long‐term experimental warming vary between different heath types in the high Arctic tundra |
title_sort |
responses of surface soc to long‐term experimental warming vary between different heath types in the high arctic tundra |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/ejss.12896 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fejss.12896 http://onlinelibrary.wiley.com/wol1/doi/10.1111/ejss.12896/fullpdf |
genre |
Climate change Greenland permafrost Tundra Zackenberg |
genre_facet |
Climate change Greenland permafrost Tundra Zackenberg |
op_source |
European Journal of Soil Science volume 71, issue 4, page 752-767 ISSN 1351-0754 1365-2389 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/ejss.12896 |
container_title |
European Journal of Soil Science |
container_volume |
71 |
container_issue |
4 |
container_start_page |
752 |
op_container_end_page |
767 |
_version_ |
1810439701877751808 |