Geology defines microbiome structure and composition in nunataks and valleys of the Sør Rondane Mountains, East Antarctica
Understanding the relation between terrestrial microorganisms and edaphic factors in the Antarctic can provide insights into their potential response to environmental changes. Here we examined the composition of bacterial and micro-eukaryotic communities using amplicon sequencing of rRNA genes in 10...
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ftdoajarticles:oai:doaj.org/article:08e8217f0295481ebb7962d4923d72dd 2024-09-15T17:48:21+00:00 Geology defines microbiome structure and composition in nunataks and valleys of the Sør Rondane Mountains, East Antarctica Valentina Savaglia Sam Lambrechts Bjorn Tytgat Quinten Vanhellemont Josef Elster Anne Willems Annick Wilmotte Elie Verleyen Wim Vyverman 2024-02-01T00:00:00Z https://doi.org/10.3389/fmicb.2024.1316633 https://doaj.org/article/08e8217f0295481ebb7962d4923d72dd EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmicb.2024.1316633/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2024.1316633 https://doaj.org/article/08e8217f0295481ebb7962d4923d72dd Frontiers in Microbiology, Vol 15 (2024) microbial ecology Antarctica bedrock rRNA bacteria eukaryotes Microbiology QR1-502 article 2024 ftdoajarticles https://doi.org/10.3389/fmicb.2024.1316633 2024-08-05T17:50:05Z Understanding the relation between terrestrial microorganisms and edaphic factors in the Antarctic can provide insights into their potential response to environmental changes. Here we examined the composition of bacterial and micro-eukaryotic communities using amplicon sequencing of rRNA genes in 105 soil samples from the Sør Rondane Mountains (East Antarctica), differing in bedrock or substrate type and associated physicochemical conditions. Although the two most widespread taxa (Acidobacteriota and Chlorophyta) were relatively abundant in each sample, multivariate analysis and co-occurrence networks revealed pronounced differences in community structure depending on substrate type. In moraine substrates, Actinomycetota and Cercozoa were the most abundant bacterial and eukaryotic phyla, whereas on gneiss, granite and marble substrates, Cyanobacteriota and Metazoa were the dominant bacterial and eukaryotic taxa. However, at lower taxonomic level, a distinct differentiation was observed within the Cyanobacteriota phylum depending on substrate type, with granite being dominated by the Nostocaceae family and marble by the Chroococcidiopsaceae family. Surprisingly, metazoans were relatively abundant according to the 18S rRNA dataset, even in samples from the most arid sites, such as moraines in Austkampane and Widerøefjellet (“Dry Valley”). Overall, our study shows that different substrate types support distinct microbial communities, and that mineral soil diversity is a major determinant of terrestrial microbial diversity in inland Antarctic nunataks and valleys. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Directory of Open Access Journals: DOAJ Articles Frontiers in Microbiology 15 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
microbial ecology Antarctica bedrock rRNA bacteria eukaryotes Microbiology QR1-502 |
spellingShingle |
microbial ecology Antarctica bedrock rRNA bacteria eukaryotes Microbiology QR1-502 Valentina Savaglia Sam Lambrechts Bjorn Tytgat Quinten Vanhellemont Josef Elster Anne Willems Annick Wilmotte Elie Verleyen Wim Vyverman Geology defines microbiome structure and composition in nunataks and valleys of the Sør Rondane Mountains, East Antarctica |
topic_facet |
microbial ecology Antarctica bedrock rRNA bacteria eukaryotes Microbiology QR1-502 |
description |
Understanding the relation between terrestrial microorganisms and edaphic factors in the Antarctic can provide insights into their potential response to environmental changes. Here we examined the composition of bacterial and micro-eukaryotic communities using amplicon sequencing of rRNA genes in 105 soil samples from the Sør Rondane Mountains (East Antarctica), differing in bedrock or substrate type and associated physicochemical conditions. Although the two most widespread taxa (Acidobacteriota and Chlorophyta) were relatively abundant in each sample, multivariate analysis and co-occurrence networks revealed pronounced differences in community structure depending on substrate type. In moraine substrates, Actinomycetota and Cercozoa were the most abundant bacterial and eukaryotic phyla, whereas on gneiss, granite and marble substrates, Cyanobacteriota and Metazoa were the dominant bacterial and eukaryotic taxa. However, at lower taxonomic level, a distinct differentiation was observed within the Cyanobacteriota phylum depending on substrate type, with granite being dominated by the Nostocaceae family and marble by the Chroococcidiopsaceae family. Surprisingly, metazoans were relatively abundant according to the 18S rRNA dataset, even in samples from the most arid sites, such as moraines in Austkampane and Widerøefjellet (“Dry Valley”). Overall, our study shows that different substrate types support distinct microbial communities, and that mineral soil diversity is a major determinant of terrestrial microbial diversity in inland Antarctic nunataks and valleys. |
format |
Article in Journal/Newspaper |
author |
Valentina Savaglia Sam Lambrechts Bjorn Tytgat Quinten Vanhellemont Josef Elster Anne Willems Annick Wilmotte Elie Verleyen Wim Vyverman |
author_facet |
Valentina Savaglia Sam Lambrechts Bjorn Tytgat Quinten Vanhellemont Josef Elster Anne Willems Annick Wilmotte Elie Verleyen Wim Vyverman |
author_sort |
Valentina Savaglia |
title |
Geology defines microbiome structure and composition in nunataks and valleys of the Sør Rondane Mountains, East Antarctica |
title_short |
Geology defines microbiome structure and composition in nunataks and valleys of the Sør Rondane Mountains, East Antarctica |
title_full |
Geology defines microbiome structure and composition in nunataks and valleys of the Sør Rondane Mountains, East Antarctica |
title_fullStr |
Geology defines microbiome structure and composition in nunataks and valleys of the Sør Rondane Mountains, East Antarctica |
title_full_unstemmed |
Geology defines microbiome structure and composition in nunataks and valleys of the Sør Rondane Mountains, East Antarctica |
title_sort |
geology defines microbiome structure and composition in nunataks and valleys of the sør rondane mountains, east antarctica |
publisher |
Frontiers Media S.A. |
publishDate |
2024 |
url |
https://doi.org/10.3389/fmicb.2024.1316633 https://doaj.org/article/08e8217f0295481ebb7962d4923d72dd |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_source |
Frontiers in Microbiology, Vol 15 (2024) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmicb.2024.1316633/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2024.1316633 https://doaj.org/article/08e8217f0295481ebb7962d4923d72dd |
op_doi |
https://doi.org/10.3389/fmicb.2024.1316633 |
container_title |
Frontiers in Microbiology |
container_volume |
15 |
_version_ |
1810289501870751744 |