Selection processes of Arctic seasonal glacier snowpack bacterial communities
Background Arctic snowpack microbial communities are continually subject to dynamic chemical and microbial input from the atmosphere. As such, the factors that contribute to structuring their microbial communities are complex and have yet to be completely resolved. These snowpack communities can be...
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Uppsala universitet, Luft-, vatten- och landskapslära
2023
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ftuppsalauniv:oai:DiVA.org:uu-497937 2023-06-11T04:09:05+02:00 Selection processes of Arctic seasonal glacier snowpack bacterial communities Keuschnig, Christoph Vogel, Timothy M. Barbaro, Elena Spolaor, Andrea Koziol, Krystyna Björkman, Mats P. Zdanowicz, Christian Gallet, Jean-Charles Luks, Bartłomiej Layton, Rose Larose, Catherine 2023 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-497937 https://doi.org/10.1186/s40168-023-01473-6 eng eng Uppsala universitet, Luft-, vatten- och landskapslära Microbiome, 2023, 11:1, orcid:0000-0002-1045-5063 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-497937 doi:10.1186/s40168-023-01473-6 PMID 36864462 ISI:000943191600003 info:eu-repo/semantics/openAccess Microbial ecology Snow Arctic Niche-based selection Neutral processes Biological Sciences Biologiska vetenskaper Article in journal info:eu-repo/semantics/article text 2023 ftuppsalauniv https://doi.org/10.1186/s40168-023-01473-6 2023-04-19T22:30:12Z Background Arctic snowpack microbial communities are continually subject to dynamic chemical and microbial input from the atmosphere. As such, the factors that contribute to structuring their microbial communities are complex and have yet to be completely resolved. These snowpack communities can be used to evaluate whether they fit niche-based or neutral assembly theories. Methods We sampled snow from 22 glacier sites on 7 glaciers across Svalbard in April during the maximum snow accumulation period and prior to the melt period to evaluate the factors that drive snowpack metataxonomy. These snowpacks were seasonal, accumulating in early winter on bare ice and firn and completely melting out in autumn. Using a Bayesian fitting strategy to evaluate Hubbell’s Unified Neutral Theory of Biodiversity at multiple sites, we tested for neutrality and defined immigration rates at different taxonomic levels. Bacterial abundance and diversity were measured and the amount of potential ice-nucleating bacteria was calculated. The chemical composition (anions, cations, organic acids) and particulate impurity load (elemental and organic carbon) of the winter and spring snowpack were also characterized. We used these data in addition to geographical information to assess possible niche-based effects on snow microbial communities using multivariate and variable partitioning analysis. Results While certain taxonomic signals were found to fit the neutral assembly model, clear evidence of niche-based selection was observed at most sites. Inorganic chemistry was not linked directly to diversity, but helped to identify predominant colonization sources and predict microbial abundance, which was tightly linked to sea spray. Organic acids were the most significant predictors of microbial diversity. At low organic acid concentrations, the snow microbial structure represented the seeding community closely, and evolved away from it at higher organic acid concentrations, with concomitant increases in bacterial numbers. Conclusions These ... Article in Journal/Newspaper Arctic glacier Svalbard Uppsala University: Publications (DiVA) Arctic Svalbard Microbiome 11 1 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Microbial ecology Snow Arctic Niche-based selection Neutral processes Biological Sciences Biologiska vetenskaper |
spellingShingle |
Microbial ecology Snow Arctic Niche-based selection Neutral processes Biological Sciences Biologiska vetenskaper Keuschnig, Christoph Vogel, Timothy M. Barbaro, Elena Spolaor, Andrea Koziol, Krystyna Björkman, Mats P. Zdanowicz, Christian Gallet, Jean-Charles Luks, Bartłomiej Layton, Rose Larose, Catherine Selection processes of Arctic seasonal glacier snowpack bacterial communities |
topic_facet |
Microbial ecology Snow Arctic Niche-based selection Neutral processes Biological Sciences Biologiska vetenskaper |
description |
Background Arctic snowpack microbial communities are continually subject to dynamic chemical and microbial input from the atmosphere. As such, the factors that contribute to structuring their microbial communities are complex and have yet to be completely resolved. These snowpack communities can be used to evaluate whether they fit niche-based or neutral assembly theories. Methods We sampled snow from 22 glacier sites on 7 glaciers across Svalbard in April during the maximum snow accumulation period and prior to the melt period to evaluate the factors that drive snowpack metataxonomy. These snowpacks were seasonal, accumulating in early winter on bare ice and firn and completely melting out in autumn. Using a Bayesian fitting strategy to evaluate Hubbell’s Unified Neutral Theory of Biodiversity at multiple sites, we tested for neutrality and defined immigration rates at different taxonomic levels. Bacterial abundance and diversity were measured and the amount of potential ice-nucleating bacteria was calculated. The chemical composition (anions, cations, organic acids) and particulate impurity load (elemental and organic carbon) of the winter and spring snowpack were also characterized. We used these data in addition to geographical information to assess possible niche-based effects on snow microbial communities using multivariate and variable partitioning analysis. Results While certain taxonomic signals were found to fit the neutral assembly model, clear evidence of niche-based selection was observed at most sites. Inorganic chemistry was not linked directly to diversity, but helped to identify predominant colonization sources and predict microbial abundance, which was tightly linked to sea spray. Organic acids were the most significant predictors of microbial diversity. At low organic acid concentrations, the snow microbial structure represented the seeding community closely, and evolved away from it at higher organic acid concentrations, with concomitant increases in bacterial numbers. Conclusions These ... |
format |
Article in Journal/Newspaper |
author |
Keuschnig, Christoph Vogel, Timothy M. Barbaro, Elena Spolaor, Andrea Koziol, Krystyna Björkman, Mats P. Zdanowicz, Christian Gallet, Jean-Charles Luks, Bartłomiej Layton, Rose Larose, Catherine |
author_facet |
Keuschnig, Christoph Vogel, Timothy M. Barbaro, Elena Spolaor, Andrea Koziol, Krystyna Björkman, Mats P. Zdanowicz, Christian Gallet, Jean-Charles Luks, Bartłomiej Layton, Rose Larose, Catherine |
author_sort |
Keuschnig, Christoph |
title |
Selection processes of Arctic seasonal glacier snowpack bacterial communities |
title_short |
Selection processes of Arctic seasonal glacier snowpack bacterial communities |
title_full |
Selection processes of Arctic seasonal glacier snowpack bacterial communities |
title_fullStr |
Selection processes of Arctic seasonal glacier snowpack bacterial communities |
title_full_unstemmed |
Selection processes of Arctic seasonal glacier snowpack bacterial communities |
title_sort |
selection processes of arctic seasonal glacier snowpack bacterial communities |
publisher |
Uppsala universitet, Luft-, vatten- och landskapslära |
publishDate |
2023 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-497937 https://doi.org/10.1186/s40168-023-01473-6 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic glacier Svalbard |
genre_facet |
Arctic glacier Svalbard |
op_relation |
Microbiome, 2023, 11:1, orcid:0000-0002-1045-5063 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-497937 doi:10.1186/s40168-023-01473-6 PMID 36864462 ISI:000943191600003 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1186/s40168-023-01473-6 |
container_title |
Microbiome |
container_volume |
11 |
container_issue |
1 |
_version_ |
1768382796339871744 |