Girard Catherine, Vincent Warwick F. et Culley Alexander I.. (2023). Arctic bacterial diversity and connectivity in the coastal margin of the Last Ice Area. ISME Communications, 3, e105.
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URL officielle: http://dx.doi.org/doi:10.1038/s43705-023-00313-w
Résumé
Arctic climate change is leading to sea-ice attrition in the Last Ice Area along the northern coast of Canada and Greenland, but less attention has been given to the associated land-based ecosystems. Here we evaluated bacterial community structure in a hydrologically coupled cryo-ecosystem in the region: Thores Glacier, proglacial Thores Lake, and its outlet to the sea. Deep amplicon sequencing revealed that Polaromonas was ubiquitous, but differed genetically among diverse niches. Surface glacier-ice was dominated by Cyanobacteria, while the perennially ice-capped, well-mixed water column of Thores Lake had a unique assemblage of Chloroflexi, Actinobacteriota, and Planctomycetota. Species richness increased downstream, but glacier microbes were little detected in the lake, suggesting strong taxonomic sorting. Ongoing climate change and the retreat of Thores Glacier would lead to complete drainage and loss of the lake microbial ecosystem, indicating the extreme vulnerability of diverse cryohabitats and unique microbiomes in the Last Ice coastal margin.
Type de document: | Article publié dans une revue avec comité d'évaluation |
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ISSN: | 2730-6151 |
Volume: | 3 |
Pages: | e105 |
Version évaluée par les pairs: | Oui |
Date: | 26 Septembre 2023 |
Identifiant unique: | 10.1038/s43705-023-00313-w |
Sujets: | Sciences naturelles et génie > Sciences appliquées > Climatologie et météorologie Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes |
Département, module, service et unité de recherche: | Départements et modules > Département des sciences fondamentales Unités de recherche > Centre de recherche sur la Boréalie (CREB) |
Mots-clés: | Microbial ecology, biodiversity, biogeography, microbial ecology, climate-change ecology |
Déposé le: | 04 oct. 2023 20:16 |
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Dernière modification: | 04 oct. 2023 20:16 |
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