Heat wave‐induced microbial thermal trait adaptation and its reversal in the Subarctic
Abstract Climate change predictions suggest that arctic and subarctic ecosystems will be particularly affected by rising temperatures and extreme weather events, including severe heat waves. Temperature is one of the most important environmental factors controlling and regulating microbial decomposi...
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Online Access: | http://dx.doi.org/10.1111/gcb.17032 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.17032 |
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crwiley:10.1111/gcb.17032 2024-06-02T08:02:44+00:00 Heat wave‐induced microbial thermal trait adaptation and its reversal in the Subarctic Tájmel, Dániel Cruz‐Paredes, Carla Rousk, Johannes Danmarks Frie Forskningsfond Knut och Alice Wallenbergs Stiftelse Vetenskapsrådet 2023 http://dx.doi.org/10.1111/gcb.17032 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.17032 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Global Change Biology volume 30, issue 1 ISSN 1354-1013 1365-2486 journal-article 2023 crwiley https://doi.org/10.1111/gcb.17032 2024-05-03T11:20:51Z Abstract Climate change predictions suggest that arctic and subarctic ecosystems will be particularly affected by rising temperatures and extreme weather events, including severe heat waves. Temperature is one of the most important environmental factors controlling and regulating microbial decomposition in soils; therefore, it is critical to understand its impact on soil microorganisms and their feedback to climate warming. We conducted a warming experiment in a subarctic birch forest in North Sweden to test the effects of summer heat waves on the thermal trait distributions that define the temperature dependences for microbial growth and respiration. We also determined the microbial temperature dependences 10 and 12 months after the heat wave simulation had ended to investigate the persistence of the thermal trait shifts. As a result of warming, the bacterial growth temperature dependence shifted to become warm‐adapted, with a similar trend for fungal growth. For respiration, there was no shift in the temperature dependence. The shifts in thermal traits were not accompanied by changes in α‐ or β‐diversity of the microbial community. Warming increased the fungal‐to‐bacterial growth ratio by 33% and decreased the microbial carbon use efficiency by 35%, and both these effects were caused by the reduction in moisture the warming treatments caused, while there was no evidence that substrate depletion had altered microbial processes. The warm‐shifted bacterial thermal traits were partially restored within one winter but only fully recovered to match ambient conditions after 1 year. To conclude, a summer heat wave in the Subarctic resulted in (i) shifts in microbial thermal trait distributions; (ii) lower microbial process rates caused by decreased moisture, not substrate depletion; and (iii) no detectable link between the microbial thermal trait shifts and community composition changes. Article in Journal/Newspaper Arctic Climate change North Sweden Subarctic Wiley Online Library Arctic Global Change Biology 30 1 |
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Wiley Online Library |
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English |
description |
Abstract Climate change predictions suggest that arctic and subarctic ecosystems will be particularly affected by rising temperatures and extreme weather events, including severe heat waves. Temperature is one of the most important environmental factors controlling and regulating microbial decomposition in soils; therefore, it is critical to understand its impact on soil microorganisms and their feedback to climate warming. We conducted a warming experiment in a subarctic birch forest in North Sweden to test the effects of summer heat waves on the thermal trait distributions that define the temperature dependences for microbial growth and respiration. We also determined the microbial temperature dependences 10 and 12 months after the heat wave simulation had ended to investigate the persistence of the thermal trait shifts. As a result of warming, the bacterial growth temperature dependence shifted to become warm‐adapted, with a similar trend for fungal growth. For respiration, there was no shift in the temperature dependence. The shifts in thermal traits were not accompanied by changes in α‐ or β‐diversity of the microbial community. Warming increased the fungal‐to‐bacterial growth ratio by 33% and decreased the microbial carbon use efficiency by 35%, and both these effects were caused by the reduction in moisture the warming treatments caused, while there was no evidence that substrate depletion had altered microbial processes. The warm‐shifted bacterial thermal traits were partially restored within one winter but only fully recovered to match ambient conditions after 1 year. To conclude, a summer heat wave in the Subarctic resulted in (i) shifts in microbial thermal trait distributions; (ii) lower microbial process rates caused by decreased moisture, not substrate depletion; and (iii) no detectable link between the microbial thermal trait shifts and community composition changes. |
author2 |
Danmarks Frie Forskningsfond Knut och Alice Wallenbergs Stiftelse Vetenskapsrådet |
format |
Article in Journal/Newspaper |
author |
Tájmel, Dániel Cruz‐Paredes, Carla Rousk, Johannes |
spellingShingle |
Tájmel, Dániel Cruz‐Paredes, Carla Rousk, Johannes Heat wave‐induced microbial thermal trait adaptation and its reversal in the Subarctic |
author_facet |
Tájmel, Dániel Cruz‐Paredes, Carla Rousk, Johannes |
author_sort |
Tájmel, Dániel |
title |
Heat wave‐induced microbial thermal trait adaptation and its reversal in the Subarctic |
title_short |
Heat wave‐induced microbial thermal trait adaptation and its reversal in the Subarctic |
title_full |
Heat wave‐induced microbial thermal trait adaptation and its reversal in the Subarctic |
title_fullStr |
Heat wave‐induced microbial thermal trait adaptation and its reversal in the Subarctic |
title_full_unstemmed |
Heat wave‐induced microbial thermal trait adaptation and its reversal in the Subarctic |
title_sort |
heat wave‐induced microbial thermal trait adaptation and its reversal in the subarctic |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/gcb.17032 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.17032 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change North Sweden Subarctic |
genre_facet |
Arctic Climate change North Sweden Subarctic |
op_source |
Global Change Biology volume 30, issue 1 ISSN 1354-1013 1365-2486 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/gcb.17032 |
container_title |
Global Change Biology |
container_volume |
30 |
container_issue |
1 |
_version_ |
1800747208302133248 |