The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes
Summary Shallow thermokarst ponds are a conspicuous landscape element of the Arctic Siberian tundra with high biogeochemical variability. Little is known about how microbes from the regional species pool assemble into local pond communities and how the resulting patterns affect functional properties...
Published in: | Environmental Microbiology |
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crwiley:10.1111/1462-2920.15260 2024-09-15T18:39:05+00:00 The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes Le Moigne, Alizée Bartosiewicz, Maciej Schaepman‐Strub, Gabriela Abiven, Samuel Pernthaler, Jakob Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Universität Zürich Universität Zürich 2020 http://dx.doi.org/10.1111/1462-2920.15260 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.15260 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1462-2920.15260 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Environmental Microbiology volume 22, issue 11, page 4847-4862 ISSN 1462-2912 1462-2920 journal-article 2020 crwiley https://doi.org/10.1111/1462-2920.15260 2024-08-20T04:15:35Z Summary Shallow thermokarst ponds are a conspicuous landscape element of the Arctic Siberian tundra with high biogeochemical variability. Little is known about how microbes from the regional species pool assemble into local pond communities and how the resulting patterns affect functional properties such as dissolved organic carbon (DOC) remineralization and greenhouse gas (GHG) turnover. We analysed the pelagic microbiomes of 20 ponds in north‐eastern Siberia in the context of their physico‐chemical properties. Ponds were categorized as polygonal or trough according to their geomorphological origin. The diversity of bacteria and eukaryotic microbes was assessed by ribosomal gene tag sequencing. Null model analysis revealed an important role of stochastic assembly processes within ponds of identical origin, in particular for genotypes only occurring in few systems. Nevertheless, the two pond types clearly represented distinct niches for both the bacterial and eukaryotic microbial communities. Carbon dioxide concentration, indicative of heterotrophic microbial processes, varied greatly, especially in the trough ponds. Methane concentrations were lower in polygonal ponds and were correlated with the estimated abundance of methanotrophs. Thus, the overall functional variability of Arctic ponds reflects the stochastic assembly of their microbial communities. Distinct functional subcommunities can, nevertheless, be related to GHG concentrations. Article in Journal/Newspaper Thermokarst Tundra Siberia Wiley Online Library Environmental Microbiology 22 11 4847 4862 |
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Wiley Online Library |
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English |
description |
Summary Shallow thermokarst ponds are a conspicuous landscape element of the Arctic Siberian tundra with high biogeochemical variability. Little is known about how microbes from the regional species pool assemble into local pond communities and how the resulting patterns affect functional properties such as dissolved organic carbon (DOC) remineralization and greenhouse gas (GHG) turnover. We analysed the pelagic microbiomes of 20 ponds in north‐eastern Siberia in the context of their physico‐chemical properties. Ponds were categorized as polygonal or trough according to their geomorphological origin. The diversity of bacteria and eukaryotic microbes was assessed by ribosomal gene tag sequencing. Null model analysis revealed an important role of stochastic assembly processes within ponds of identical origin, in particular for genotypes only occurring in few systems. Nevertheless, the two pond types clearly represented distinct niches for both the bacterial and eukaryotic microbial communities. Carbon dioxide concentration, indicative of heterotrophic microbial processes, varied greatly, especially in the trough ponds. Methane concentrations were lower in polygonal ponds and were correlated with the estimated abundance of methanotrophs. Thus, the overall functional variability of Arctic ponds reflects the stochastic assembly of their microbial communities. Distinct functional subcommunities can, nevertheless, be related to GHG concentrations. |
author2 |
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung Universität Zürich Universität Zürich |
format |
Article in Journal/Newspaper |
author |
Le Moigne, Alizée Bartosiewicz, Maciej Schaepman‐Strub, Gabriela Abiven, Samuel Pernthaler, Jakob |
spellingShingle |
Le Moigne, Alizée Bartosiewicz, Maciej Schaepman‐Strub, Gabriela Abiven, Samuel Pernthaler, Jakob The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes |
author_facet |
Le Moigne, Alizée Bartosiewicz, Maciej Schaepman‐Strub, Gabriela Abiven, Samuel Pernthaler, Jakob |
author_sort |
Le Moigne, Alizée |
title |
The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes |
title_short |
The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes |
title_full |
The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes |
title_fullStr |
The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes |
title_full_unstemmed |
The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes |
title_sort |
biogeochemical variability of arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/1462-2920.15260 https://onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.15260 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1462-2920.15260 |
genre |
Thermokarst Tundra Siberia |
genre_facet |
Thermokarst Tundra Siberia |
op_source |
Environmental Microbiology volume 22, issue 11, page 4847-4862 ISSN 1462-2912 1462-2920 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1111/1462-2920.15260 |
container_title |
Environmental Microbiology |
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22 |
container_issue |
11 |
container_start_page |
4847 |
op_container_end_page |
4862 |
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1810483480167972864 |