Titre
Aerobiology over the Southern Ocean - Implications for bacterial colonization of Antarctica.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Malard, L.A.
Auteure/Auteur
Avila-Jimenez, M.L.
Auteure/Auteur
Schmale, J.
Auteure/Auteur
Cuthbertson, L.
Auteure/Auteur
Cockerton, L.
Auteure/Auteur
Pearce, D.A.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1873-6750
Statut éditorial
Publié
Date de publication
2022-11
Volume
169
Première page
107492
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Publication Status: ppublish
Résumé
Parts of the Antarctic are experiencing dramatic ecosystem change due to rapid and record warming, which may weaken biogeographic boundaries and modify dispersal barriers, increasing the risk of biological invasions. In this study, we collected air samples from 100 locations around the Southern Ocean to analyze bacterial biodiversity in the circumpolar air around the Antarctic continent, as understanding dispersal processes is paramount to assessing the risks of microbiological invasions. We also compared the Southern Ocean air bacterial biodiversity to non-polar ecosystems to identify the potential origin of these Southern Ocean air microorganisms. The bacterial diversity in the air had both local and global origins and presented low richness overall but high heterogeneity, compatible with a scenario whereby samples are composed of a suite of different species in very low relative abundances. Only 4% of Amplicon Sequence Variants (ASVs) were identified in both polar and non-polar air masses, suggesting that the polar air mass over the Southern Ocean can act as a selective dispersal filter. Furthermore, both microbial diversity and community structure both varied significantly with meteorological data, suggesting that regional bacterial biodiversity could be sensitive to changes in weather conditions, potentially altering the existing pattern of microbial deposition in the Antarctic.
PID Serval
serval:BIB_CC7648BB5A26
PMID
Open Access
Oui
Date de création
2022-10-11T12:22:38.944Z
Date de création dans IRIS
2025-05-20T23:22:27Z
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Nom
1-s2.0-S0160412022004196-main.pdf
Version du manuscrit
published
Licence
https://creativecommons.org/licenses/by/4.0
Taille
5.78 MB
Format
Adobe PDF
PID Serval
serval:BIB_CC7648BB5A26.P001
URN
urn:nbn:ch:serval-BIB_CC7648BB5A260
Somme de contrôle
(MD5):5e6717bb46133cdc11ce260d96d89058