Fungi benefit from two decades of increased nutrient availability in tundra heath soil.
If microbial degradation of carbon substrates in arctic soil is stimulated by climatic warming, this would be a significant positive feedback on global change. With data from a climate change experiment in Northern Sweden we show that warming and enhanced soil nutrient availability, which is a predi...
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ftdoajarticles:oai:doaj.org/article:f7a567b47ba44937a2e04b3e07d6d9c2 2023-05-15T14:57:52+02:00 Fungi benefit from two decades of increased nutrient availability in tundra heath soil. Riikka Rinnan Anders Michelsen Erland Bååth 2013-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0056532 https://doaj.org/article/f7a567b47ba44937a2e04b3e07d6d9c2 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3577890?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0056532 https://doaj.org/article/f7a567b47ba44937a2e04b3e07d6d9c2 PLoS ONE, Vol 8, Iss 2, p e56532 (2013) Medicine R Science Q article 2013 ftdoajarticles https://doi.org/10.1371/journal.pone.0056532 2022-12-31T09:35:12Z If microbial degradation of carbon substrates in arctic soil is stimulated by climatic warming, this would be a significant positive feedback on global change. With data from a climate change experiment in Northern Sweden we show that warming and enhanced soil nutrient availability, which is a predicted long-term consequence of climatic warming and mimicked by fertilization, both increase soil microbial biomass. However, while fertilization increased the relative abundance of fungi, warming caused only a minimal shift in the microbial community composition based on the phospholipid fatty acid (PLFA) and neutral lipid fatty acid (NLFA) profiles. The function of the microbial community was also differently affected, as indicated by stable isotope probing of PLFA and NLFA. We demonstrate that two decades of fertilization have favored fungi relative to bacteria, and increased the turnover of complex organic compounds such as vanillin, while warming has had no such effects. Furthermore, the NLFA-to-PLFA ratio for (13)C-incorporation from acetate increased in warmed plots but not in fertilized ones. Thus, fertilization cannot be used as a proxy for effects on warming in arctic tundra soils. Furthermore, the different functional responses suggest that the biomass increase found in both fertilized and warmed plots was mediated via different mechanisms. Article in Journal/Newspaper Arctic Climate change Northern Sweden Tundra Directory of Open Access Journals: DOAJ Articles Arctic PLoS ONE 8 2 e56532 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
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Medicine R Science Q Riikka Rinnan Anders Michelsen Erland Bååth Fungi benefit from two decades of increased nutrient availability in tundra heath soil. |
topic_facet |
Medicine R Science Q |
description |
If microbial degradation of carbon substrates in arctic soil is stimulated by climatic warming, this would be a significant positive feedback on global change. With data from a climate change experiment in Northern Sweden we show that warming and enhanced soil nutrient availability, which is a predicted long-term consequence of climatic warming and mimicked by fertilization, both increase soil microbial biomass. However, while fertilization increased the relative abundance of fungi, warming caused only a minimal shift in the microbial community composition based on the phospholipid fatty acid (PLFA) and neutral lipid fatty acid (NLFA) profiles. The function of the microbial community was also differently affected, as indicated by stable isotope probing of PLFA and NLFA. We demonstrate that two decades of fertilization have favored fungi relative to bacteria, and increased the turnover of complex organic compounds such as vanillin, while warming has had no such effects. Furthermore, the NLFA-to-PLFA ratio for (13)C-incorporation from acetate increased in warmed plots but not in fertilized ones. Thus, fertilization cannot be used as a proxy for effects on warming in arctic tundra soils. Furthermore, the different functional responses suggest that the biomass increase found in both fertilized and warmed plots was mediated via different mechanisms. |
format |
Article in Journal/Newspaper |
author |
Riikka Rinnan Anders Michelsen Erland Bååth |
author_facet |
Riikka Rinnan Anders Michelsen Erland Bååth |
author_sort |
Riikka Rinnan |
title |
Fungi benefit from two decades of increased nutrient availability in tundra heath soil. |
title_short |
Fungi benefit from two decades of increased nutrient availability in tundra heath soil. |
title_full |
Fungi benefit from two decades of increased nutrient availability in tundra heath soil. |
title_fullStr |
Fungi benefit from two decades of increased nutrient availability in tundra heath soil. |
title_full_unstemmed |
Fungi benefit from two decades of increased nutrient availability in tundra heath soil. |
title_sort |
fungi benefit from two decades of increased nutrient availability in tundra heath soil. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2013 |
url |
https://doi.org/10.1371/journal.pone.0056532 https://doaj.org/article/f7a567b47ba44937a2e04b3e07d6d9c2 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Northern Sweden Tundra |
genre_facet |
Arctic Climate change Northern Sweden Tundra |
op_source |
PLoS ONE, Vol 8, Iss 2, p e56532 (2013) |
op_relation |
http://europepmc.org/articles/PMC3577890?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0056532 https://doaj.org/article/f7a567b47ba44937a2e04b3e07d6d9c2 |
op_doi |
https://doi.org/10.1371/journal.pone.0056532 |
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PLoS ONE |
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8 |
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2 |
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e56532 |
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