Aerobiology over the Southern Ocean - Implications for bacterial colonization of Antarctica.

Details

Serval ID
serval:BIB_CC7648BB5A26
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Aerobiology over the Southern Ocean - Implications for bacterial colonization of Antarctica.
Journal
Environment international
Author(s)
Malard L.A., Avila-Jimenez M.L., Schmale J., Cuthbertson L., Cockerton L., Pearce D.A.
ISSN
1873-6750 (Electronic)
ISSN-L
0160-4120
Publication state
Published
Issued date
11/2022
Peer-reviewed
Oui
Volume
169
Pages
107492
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
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.
Keywords
Antarctic Regions, Bacteria/genetics, Biodiversity, Ecosystem, Oceans and Seas, Aerobiology, Antarctica, Bacteria, Climate change, Dispersal, Invasion
Pubmed
Web of science
Open Access
Yes
Create date
11/10/2022 13:22
Last modification date
09/03/2023 6:49
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