Comparing soil microbial responses to drying-rewetting and freezing-thawing events
Climate change is expected to alter the frequency and intensity of soil drying-rewetting (D/RW) and freezing-thawing (F/TW) events, with consequences for the activities of microorganisms. Although both D/RW and F/TW events cause respiration pulses from soil to the atmosphere, it remains unknown whet...
Published in: | Soil Biology and Biochemistry |
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ftulundlup:oai:lup.lub.lu.se:964bb5a2-0e5e-4c7d-9649-5f12da523527 2023-05-15T16:37:57+02:00 Comparing soil microbial responses to drying-rewetting and freezing-thawing events Li, Jin-Tao Xu, Huimin Hicks, Lettice C. Brangarí, Albert C. Rousk, Johannes 2023-03 https://lup.lub.lu.se/record/964bb5a2-0e5e-4c7d-9649-5f12da523527 https://doi.org/10.1016/j.soilbio.2023.108966 eng eng Elsevier https://lup.lub.lu.se/record/964bb5a2-0e5e-4c7d-9649-5f12da523527 http://dx.doi.org/10.1016/j.soilbio.2023.108966 scopus:85147329471 Soil Biology and Biochemistry; 178, no 108966 (2023) ISSN: 0038-0717 Soil Science Microbiology Climate Research Drought Drying-rewetting Extreme weather Freezing-thawing Ice melting Microbial growth efficiency Permafrost Precipitation Rain event Wet-up contributiontojournal/article info:eu-repo/semantics/article text 2023 ftulundlup https://doi.org/10.1016/j.soilbio.2023.108966 2023-02-22T23:27:25Z Climate change is expected to alter the frequency and intensity of soil drying-rewetting (D/RW) and freezing-thawing (F/TW) events, with consequences for the activities of microorganisms. Although both D/RW and F/TW events cause respiration pulses from soil to the atmosphere, it remains unknown whether the underlying microbial control is similar. Recent work has revealed that soil microbial responses to D/RW vary between two extremes: (Type 1) a resilient response, with a fast recovery of growth rates associated with a brief respiration pulse, or (Type 2) a sensitive response, where growth rates recover only after a lag period of no apparent growth associated with a prolonged respiration pulse. However, it remains unknown if these different microbial perturbation responses also occur after F/TW. Here, we directly compared microbial growth, respiration, and carbon-use efficiency (CUE) in response to D/RW and F/TW events. To do this, we selected two forest soils characterized by either sensitive or resilient responses to D/RW. We could confirm that D/RW induced either sensitive or resilient bacterial growth and respiration responses, but also that these distinct responses were found after F/TW. Additionally, F/TW resulted in shorter lag periods before the increase of bacterial growth, smaller respiration pulses, and lower levels of cumulative respiration, bacterial growth and fungal growth after the perturbation than did D/RW. These findings are consistent with a F/TW event imposing a similar stress on soil microorganisms to a D/RW event, but with lower severity. However, there was no significant difference in the microbial CUE between D/RW and F/TW, indicating that microorganisms maintain the stability of their C allocation in response to both types of perturbation. Altogether, our findings suggest that microbial communities are exposed to similar environmental pressures during D/RW and F/TW, implying that strategies to cope with drought can also provide protection to winter frost, and vice versa. Article in Journal/Newspaper Ice permafrost Lund University Publications (LUP) Soil Biology and Biochemistry 178 108966 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Soil Science Microbiology Climate Research Drought Drying-rewetting Extreme weather Freezing-thawing Ice melting Microbial growth efficiency Permafrost Precipitation Rain event Wet-up |
spellingShingle |
Soil Science Microbiology Climate Research Drought Drying-rewetting Extreme weather Freezing-thawing Ice melting Microbial growth efficiency Permafrost Precipitation Rain event Wet-up Li, Jin-Tao Xu, Huimin Hicks, Lettice C. Brangarí, Albert C. Rousk, Johannes Comparing soil microbial responses to drying-rewetting and freezing-thawing events |
topic_facet |
Soil Science Microbiology Climate Research Drought Drying-rewetting Extreme weather Freezing-thawing Ice melting Microbial growth efficiency Permafrost Precipitation Rain event Wet-up |
description |
Climate change is expected to alter the frequency and intensity of soil drying-rewetting (D/RW) and freezing-thawing (F/TW) events, with consequences for the activities of microorganisms. Although both D/RW and F/TW events cause respiration pulses from soil to the atmosphere, it remains unknown whether the underlying microbial control is similar. Recent work has revealed that soil microbial responses to D/RW vary between two extremes: (Type 1) a resilient response, with a fast recovery of growth rates associated with a brief respiration pulse, or (Type 2) a sensitive response, where growth rates recover only after a lag period of no apparent growth associated with a prolonged respiration pulse. However, it remains unknown if these different microbial perturbation responses also occur after F/TW. Here, we directly compared microbial growth, respiration, and carbon-use efficiency (CUE) in response to D/RW and F/TW events. To do this, we selected two forest soils characterized by either sensitive or resilient responses to D/RW. We could confirm that D/RW induced either sensitive or resilient bacterial growth and respiration responses, but also that these distinct responses were found after F/TW. Additionally, F/TW resulted in shorter lag periods before the increase of bacterial growth, smaller respiration pulses, and lower levels of cumulative respiration, bacterial growth and fungal growth after the perturbation than did D/RW. These findings are consistent with a F/TW event imposing a similar stress on soil microorganisms to a D/RW event, but with lower severity. However, there was no significant difference in the microbial CUE between D/RW and F/TW, indicating that microorganisms maintain the stability of their C allocation in response to both types of perturbation. Altogether, our findings suggest that microbial communities are exposed to similar environmental pressures during D/RW and F/TW, implying that strategies to cope with drought can also provide protection to winter frost, and vice versa. |
format |
Article in Journal/Newspaper |
author |
Li, Jin-Tao Xu, Huimin Hicks, Lettice C. Brangarí, Albert C. Rousk, Johannes |
author_facet |
Li, Jin-Tao Xu, Huimin Hicks, Lettice C. Brangarí, Albert C. Rousk, Johannes |
author_sort |
Li, Jin-Tao |
title |
Comparing soil microbial responses to drying-rewetting and freezing-thawing events |
title_short |
Comparing soil microbial responses to drying-rewetting and freezing-thawing events |
title_full |
Comparing soil microbial responses to drying-rewetting and freezing-thawing events |
title_fullStr |
Comparing soil microbial responses to drying-rewetting and freezing-thawing events |
title_full_unstemmed |
Comparing soil microbial responses to drying-rewetting and freezing-thawing events |
title_sort |
comparing soil microbial responses to drying-rewetting and freezing-thawing events |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://lup.lub.lu.se/record/964bb5a2-0e5e-4c7d-9649-5f12da523527 https://doi.org/10.1016/j.soilbio.2023.108966 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Soil Biology and Biochemistry; 178, no 108966 (2023) ISSN: 0038-0717 |
op_relation |
https://lup.lub.lu.se/record/964bb5a2-0e5e-4c7d-9649-5f12da523527 http://dx.doi.org/10.1016/j.soilbio.2023.108966 scopus:85147329471 |
op_doi |
https://doi.org/10.1016/j.soilbio.2023.108966 |
container_title |
Soil Biology and Biochemistry |
container_volume |
178 |
container_start_page |
108966 |
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1766028248246910976 |