(Sub-)Antarctic endemic cyanobacteria from benthic mats are rare and have restricted geographic distributions

Durieu, Benoit; Savaglia, Valentina; Lara, Yannick; Lambion, Alexandre; Pessi, Igor S.; Vyverman, Wim; Verleyen, Elie; Wilmotte, Annick

doi:10.1111/ecog.07489

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(Sub-)Antarctic endemic cyanobacteria from benthic mats are rare and have restricted geographic distributions

Durieu, Benoit; Savaglia, Valentina; Lara, Yannick et al.

2024 • In Ecography

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https://hdl.handle.net/2268/323995

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10.1111/ecog.07489

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Keywords :

ACBRs; Antarctica; benthic mats; biogeography; cyanobacteria; lakes; sub-Antarctic islands; Ecology, Evolution, Behavior and Systematics

Abstract :

[en] The Antarctic terrestrial macrobiota are highly endemic and biogeographically structured, but whether this also holds true for microbial groups remains poorly understood. We studied the biogeographic patterns of Antarctic cyanobacteria from benthic microbial mats sampled in 84 lakes from two sub-Antarctic islands, as well as from eight Antarctic Conservation Biogeographic Regions (ACBRs) which were previously defined based mainly on macroscopic taxa. Analysis of 16S rRNA gene sequences revealed that Antarctic and sub-Antarctic lakes host significantly different cyanobacterial communities, yet that the bioregionalization pattern did not correspond to the division into ACBRs. Both Antarctic and sub-Antarctic lakes contain a high number of potentially endemic taxa (41% of the total diversity), of which 33.3% attain a relative abundance of < 1%. Our findings highlight the uniqueness of Antarctic microbiota and the need for increased protection of inland waters in both Antarctica and the sub-Antarctic islands.

Disciplines :

Environmental sciences & ecology

Author, co-author :

Durieu, Benoit ; Université de Liège - ULiège > Integrative Biological Sciences (InBioS)

Savaglia, Valentina ; Université de Liège - ULiège > Département des sciences de la vie > Physiologie et génétique bactériennes ; Laboratory of Protistology & Aquatic Ecology, Ghent University, Ghent, Belgium ; Plant Biology and Ecology, Universidad de Sevilla, Sevilla, Spain

Lara, Yannick ; Université de Liège - ULiège > Département de géologie > Early Life Traces & Evolution-Astrobiology

Lambion, Alexandre ; Université de Liège - ULiège > Département de géologie > Early Life Traces & Evolution-Astrobiology

Pessi, Igor S. ; Finnish Environment Institute (Syke), Helsinki, Finland

Vyverman, Wim ; Laboratory of Protistology & Aquatic Ecology, Ghent University, Ghent, Belgium

Verleyen, Elie ; Laboratory of Protistology & Aquatic Ecology, Ghent University, Ghent, Belgium

Wilmotte, Annick ; Université de Liège - ULiège > Integrative Biological Sciences (InBioS)

Language :

English

Title :

(Sub-)Antarctic endemic cyanobacteria from benthic mats are rare and have restricted geographic distributions

Publication date :

2024

Journal title :

Ecography

ISSN :

0906-7590

eISSN :

1600-0587

Publisher :

John Wiley and Sons Inc

Peer reviewed :

Peer Reviewed verified by ORBi

Funding text :

\u2013 We wish to thank the Australian Antarctic Division, the French Polar Institute (IPEV), the British Antarctic Survey, the Japanese Institute for Polar Research, the South African National Antarctic Program, the Direcci\u00F3n Nacional del Ant\u00E1rtico (DNA) and Instituto Ant\u00E1rtico Argentino (IAA), the International Polar Foundation (IPF), the Programma Nazionale di Ricerche in Antartide (PNRA), and the Czech Centre for Polar Ecology for providing logistic and/or financial support during the sampling campaigns. In addition, we would like to thank all the people from the Lagos group involved in the Vega Island fieldwork. We also wish to thank Dagmar Obbels, John A. E. Gibson, Pieter Vanormelingen, Dominic A. Hodgson, Steven L. Chown, Roberto Bargagli, Michael J. Bentley, Francesca Borghini, Peter Convey, Josef Elster, Satoshi Imura, Kate\u0159ina Kopalov\u00E1, Sakae Kudoh, Zorigto Namsaraev, Stephen J. Roberts, James A. Smith, Otakar Strunecky and Wim Van Nieuwenhuyze for providing samples.\u2013 This work was supported by Belgian Science Policy Office (BelSPo) project CCAMBIO (SD/BA/03); VS, BD and AW were supported by the National Fund for Scientific Research (FRS\u2010FNRS); VS is also supported the Spanish Ministry of Science and Innovation (TED2021\u2010132332A\u2010C22, PID2021\u2010123097OA\u2010I00).

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