Unpublished conference/Abstract (Scientific congresses and symposiums)
Soil substrate shapes edaphic cyanobacterial communities in the Sør Rondane Mountains, East Antarctica
Savaglia, Valentina; Durieu, Benoit; Tytgat, Bjorn et al.
2024Global Antarctic research event, SCAR 2024
 

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Keywords :
Antarctica; microbial communities; environmental parameters; metabarcoding; 16S rRNA; taxonomy; biodiversity
Abstract :
[en] Cyanobacteria are regarded as ecosystem engineers (Chrismas et al. 2018) in Antarctic ice-free areas because of their important role as primary producers. Yet, cyanobacterial communities and their drivers within edaphic ecosystems of inland Antarctica are often overlooked. A previous study (Savaglia et al. 2024) describing microbial communities from around 100 soil samples of the western Sør Rondane Mountains (East Antarctica) showed that substrate types were major structuring factors and several cyanobacterial phylotypes were recognized as putative keystone taxa. Here, cyanobacterial diversity was further investigated. Amplicon sequencing was applied using cyanobacterial specific primer targeting the V3-V4 region of the 16S rRNA gene via the Illumina MiSeq platform and taxonomy was assigned using the recent CyanoSeq database to the same samples set. Our results confirmed that substrate types shape cyanobacterial communities, providing a higher taxonomic resolution. Granite harboured the greatest cyanobacterial diversity with a high abundance of filamentous cyanobacteria (i.e. Leptolyngbyaceae, Gomontiellaceae, Microcoleaceae, Oculatellaceae, Nostocaceae), but also unicellular taxa (Cyanothecaceae). By contrast, cyanobacterial diversity was lower in the other substrate types, often dominated by only one taxon. Particularly, marble was dominated by Alitarella, gneiss by Cyanothece, and moraines from the dry and oligotrophic Austkampane and Widerøefjellet sites by Microcoleaceae and Gomontiellaceae, respectively. An indicator taxa analysis showed many unknown taxa uniquely encountered in the moraines of Yûboku-dani Valley, suggesting a high degree of endemicity where the only known lakes in the region occur. Overall, our data highlight the importance of using specific primers and up-to-date taxonomy to accurately draw conclusions about microbial ecology
Research Center/Unit :
InBios - Integrative Biological Sciences - ULiège
Disciplines :
Aquatic sciences & oceanology
Environmental sciences & ecology
Author, co-author :
Savaglia, Valentina  ;  Université de Liège - ULiège > Département des sciences de la vie > Physiologie et génétique bactériennes
Durieu, Benoit ;  Université de Liège - ULiège > Département des sciences de la vie > Diversité et écologie moléculaire des cyanobactéries
Tytgat, Bjorn
Elster, Josef
Vyverman, Wim
Verleyen, Elie
Wilmotte, Annick  ;  Université de Liège - ULiège > Département des sciences de la vie > Diversité et écologie moléculaire des cyanobactéries
Language :
English
Title :
Soil substrate shapes edaphic cyanobacterial communities in the Sør Rondane Mountains, East Antarctica
Publication date :
August 2024
Number of pages :
1
Event name :
Global Antarctic research event, SCAR 2024
Event organizer :
INACH
Event place :
Pucon, Chile
Event date :
17 au 23 août 2024
Event number :
11th OSC SCAR
Audience :
International
References of the abstract :
Book of Abstracts from the 11th SCAR Open Science Conference https://scar.org/~documents/route%3A/download/6303, number 1420 ISBN 978-0-948277-69-6
Development Goals :
15. Life on land
Name of the research project :
MICROBIAN
Funders :
BELSPO - Belgian Federal Science Policy Office
F.R.S.-FNRS - Fonds de la Recherche Scientifique
Funding number :
BR/165/A1/MICROBIAN
Available on ORBi :
since 27 December 2024

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