Seasonal variation in near-surface seasonally thawed active layer and permafrost soil microbial communities
Abstract Understanding how soil microbes respond to permafrost thaw is critical to predicting the implications of climate change for soil processes. However, our knowledge of microbial responses to warming is mainly based on laboratory thaw experiments, and field sampling in warmer months when sites...
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crioppubl:10.1088/1748-9326/acc542 2024-06-02T08:13:00+00:00 Seasonal variation in near-surface seasonally thawed active layer and permafrost soil microbial communities Baker, Christopher C M Barker, Amanda J Douglas, Thomas A Doherty, Stacey J Barbato, Robyn A U.S. Department of Defense 2023 http://dx.doi.org/10.1088/1748-9326/acc542 https://iopscience.iop.org/article/10.1088/1748-9326/acc542 https://iopscience.iop.org/article/10.1088/1748-9326/acc542/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 18, issue 5, page 055001 ISSN 1748-9326 journal-article 2023 crioppubl https://doi.org/10.1088/1748-9326/acc542 2024-05-07T13:58:31Z Abstract Understanding how soil microbes respond to permafrost thaw is critical to predicting the implications of climate change for soil processes. However, our knowledge of microbial responses to warming is mainly based on laboratory thaw experiments, and field sampling in warmer months when sites are more accessible. In this study, we sampled a depth profile through seasonally thawed active layer and permafrost in the Imnavait Creek Watershed, Alaska, USA over the growing season from summer to late fall. Amplicon sequencing showed that bacterial and fungal communities differed in composition across both sampling depths and sampling months. Surface communities were most variable while those from the deepest samples, which remained frozen throughout our sampling period, showed little to no variation over time. However, community variation was not explained by trace metal concentrations, soil nutrient content, pH, or soil condition (frozen/thawed), except insofar as those measurements were correlated with depth. Our results highlight the importance of collecting samples at multiple times throughout the year to capture temporal variation, and suggest that data from across the annual freeze-thaw cycle might help predict microbial responses to permafrost thaw. Article in Journal/Newspaper permafrost Alaska IOP Publishing Environmental Research Letters |
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Abstract Understanding how soil microbes respond to permafrost thaw is critical to predicting the implications of climate change for soil processes. However, our knowledge of microbial responses to warming is mainly based on laboratory thaw experiments, and field sampling in warmer months when sites are more accessible. In this study, we sampled a depth profile through seasonally thawed active layer and permafrost in the Imnavait Creek Watershed, Alaska, USA over the growing season from summer to late fall. Amplicon sequencing showed that bacterial and fungal communities differed in composition across both sampling depths and sampling months. Surface communities were most variable while those from the deepest samples, which remained frozen throughout our sampling period, showed little to no variation over time. However, community variation was not explained by trace metal concentrations, soil nutrient content, pH, or soil condition (frozen/thawed), except insofar as those measurements were correlated with depth. Our results highlight the importance of collecting samples at multiple times throughout the year to capture temporal variation, and suggest that data from across the annual freeze-thaw cycle might help predict microbial responses to permafrost thaw. |
author2 |
U.S. Department of Defense |
format |
Article in Journal/Newspaper |
author |
Baker, Christopher C M Barker, Amanda J Douglas, Thomas A Doherty, Stacey J Barbato, Robyn A |
spellingShingle |
Baker, Christopher C M Barker, Amanda J Douglas, Thomas A Doherty, Stacey J Barbato, Robyn A Seasonal variation in near-surface seasonally thawed active layer and permafrost soil microbial communities |
author_facet |
Baker, Christopher C M Barker, Amanda J Douglas, Thomas A Doherty, Stacey J Barbato, Robyn A |
author_sort |
Baker, Christopher C M |
title |
Seasonal variation in near-surface seasonally thawed active layer and permafrost soil microbial communities |
title_short |
Seasonal variation in near-surface seasonally thawed active layer and permafrost soil microbial communities |
title_full |
Seasonal variation in near-surface seasonally thawed active layer and permafrost soil microbial communities |
title_fullStr |
Seasonal variation in near-surface seasonally thawed active layer and permafrost soil microbial communities |
title_full_unstemmed |
Seasonal variation in near-surface seasonally thawed active layer and permafrost soil microbial communities |
title_sort |
seasonal variation in near-surface seasonally thawed active layer and permafrost soil microbial communities |
publisher |
IOP Publishing |
publishDate |
2023 |
url |
http://dx.doi.org/10.1088/1748-9326/acc542 https://iopscience.iop.org/article/10.1088/1748-9326/acc542 https://iopscience.iop.org/article/10.1088/1748-9326/acc542/pdf |
genre |
permafrost Alaska |
genre_facet |
permafrost Alaska |
op_source |
Environmental Research Letters volume 18, issue 5, page 055001 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/acc542 |
container_title |
Environmental Research Letters |
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1800759634691096576 |