Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients
Permafrost underlies approximately one quarter of Northern Hemisphere terrestrial surfaces and contains 25-50% of the global soil carbon (C) pool. Permafrost soils and the C stocks within are vulnerable to ongoing and future projected climate warming. The biogeography of microbial communities inhabi...
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ftcdlib:oai:escholarship.org:ark:/13030/qt38m032wb 2024-02-27T08:44:22+00:00 Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients Waldrop, Mark P Chabot, Christopher L Liebner, Susanne Holm, Stine Snyder, Michael W Dillon, Megan Dudgeon, Steven R Douglas, Thomas A Leewis, Mary-Cathrine Anthony, Katey M Walter McFarland, Jack W Arp, Christopher D Bondurant, Allen C Taş, Neslihan Mackelprang, Rachel 1224 - 1235 2023-08-01 application/pdf https://escholarship.org/uc/item/38m032wb unknown eScholarship, University of California qt38m032wb https://escholarship.org/uc/item/38m032wb public The ISME Journal: Multidisciplinary Journal of Microbial Ecology, vol 17, iss 8 Biological Sciences Ecology Climate Action Permafrost Soil Soil Microbiology Microbiota Metagenome Carbon Environmental Sciences Technology Microbiology article 2023 ftcdlib 2024-01-29T19:06:27Z Permafrost underlies approximately one quarter of Northern Hemisphere terrestrial surfaces and contains 25-50% of the global soil carbon (C) pool. Permafrost soils and the C stocks within are vulnerable to ongoing and future projected climate warming. The biogeography of microbial communities inhabiting permafrost has not been examined beyond a small number of sites focused on local-scale variation. Permafrost is different from other soils. Perennially frozen conditions in permafrost dictate that microbial communities do not turn over quickly, thus possibly providing strong linkages to past environments. Thus, the factors structuring the composition and function of microbial communities may differ from patterns observed in other terrestrial environments. Here, we analyzed 133 permafrost metagenomes from North America, Europe, and Asia. Permafrost biodiversity and taxonomic distribution varied in relation to pH, latitude and soil depth. The distribution of genes differed by latitude, soil depth, age, and pH. Genes that were the most highly variable across all sites were associated with energy metabolism and C-assimilation. Specifically, methanogenesis, fermentation, nitrate reduction, and replenishment of citric acid cycle intermediates. This suggests that adaptations to energy acquisition and substrate availability are among some of the strongest selective pressures shaping permafrost microbial communities. The spatial variation in metabolic potential has primed communities for specific biogeochemical processes as soils thaw due to climate change, which could cause regional- to global- scale variation in C and nitrogen processing and greenhouse gas emissions. Article in Journal/Newspaper permafrost University of California: eScholarship |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Biological Sciences Ecology Climate Action Permafrost Soil Soil Microbiology Microbiota Metagenome Carbon Environmental Sciences Technology Microbiology |
spellingShingle |
Biological Sciences Ecology Climate Action Permafrost Soil Soil Microbiology Microbiota Metagenome Carbon Environmental Sciences Technology Microbiology Waldrop, Mark P Chabot, Christopher L Liebner, Susanne Holm, Stine Snyder, Michael W Dillon, Megan Dudgeon, Steven R Douglas, Thomas A Leewis, Mary-Cathrine Anthony, Katey M Walter McFarland, Jack W Arp, Christopher D Bondurant, Allen C Taş, Neslihan Mackelprang, Rachel Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients |
topic_facet |
Biological Sciences Ecology Climate Action Permafrost Soil Soil Microbiology Microbiota Metagenome Carbon Environmental Sciences Technology Microbiology |
description |
Permafrost underlies approximately one quarter of Northern Hemisphere terrestrial surfaces and contains 25-50% of the global soil carbon (C) pool. Permafrost soils and the C stocks within are vulnerable to ongoing and future projected climate warming. The biogeography of microbial communities inhabiting permafrost has not been examined beyond a small number of sites focused on local-scale variation. Permafrost is different from other soils. Perennially frozen conditions in permafrost dictate that microbial communities do not turn over quickly, thus possibly providing strong linkages to past environments. Thus, the factors structuring the composition and function of microbial communities may differ from patterns observed in other terrestrial environments. Here, we analyzed 133 permafrost metagenomes from North America, Europe, and Asia. Permafrost biodiversity and taxonomic distribution varied in relation to pH, latitude and soil depth. The distribution of genes differed by latitude, soil depth, age, and pH. Genes that were the most highly variable across all sites were associated with energy metabolism and C-assimilation. Specifically, methanogenesis, fermentation, nitrate reduction, and replenishment of citric acid cycle intermediates. This suggests that adaptations to energy acquisition and substrate availability are among some of the strongest selective pressures shaping permafrost microbial communities. The spatial variation in metabolic potential has primed communities for specific biogeochemical processes as soils thaw due to climate change, which could cause regional- to global- scale variation in C and nitrogen processing and greenhouse gas emissions. |
format |
Article in Journal/Newspaper |
author |
Waldrop, Mark P Chabot, Christopher L Liebner, Susanne Holm, Stine Snyder, Michael W Dillon, Megan Dudgeon, Steven R Douglas, Thomas A Leewis, Mary-Cathrine Anthony, Katey M Walter McFarland, Jack W Arp, Christopher D Bondurant, Allen C Taş, Neslihan Mackelprang, Rachel |
author_facet |
Waldrop, Mark P Chabot, Christopher L Liebner, Susanne Holm, Stine Snyder, Michael W Dillon, Megan Dudgeon, Steven R Douglas, Thomas A Leewis, Mary-Cathrine Anthony, Katey M Walter McFarland, Jack W Arp, Christopher D Bondurant, Allen C Taş, Neslihan Mackelprang, Rachel |
author_sort |
Waldrop, Mark P |
title |
Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients |
title_short |
Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients |
title_full |
Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients |
title_fullStr |
Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients |
title_full_unstemmed |
Permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients |
title_sort |
permafrost microbial communities and functional genes are structured by latitudinal and soil geochemical gradients |
publisher |
eScholarship, University of California |
publishDate |
2023 |
url |
https://escholarship.org/uc/item/38m032wb |
op_coverage |
1224 - 1235 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
The ISME Journal: Multidisciplinary Journal of Microbial Ecology, vol 17, iss 8 |
op_relation |
qt38m032wb https://escholarship.org/uc/item/38m032wb |
op_rights |
public |
_version_ |
1792052776421818368 |