Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica
The retreat of glaciers in Antarctica has increased in the last decades due to global climate change, influencing vegetation expansion, and soil physico-chemical and biological attributes. However, little is known about soil microbiology diversity in these periglacial landscapes. This study characte...
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2024
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ftuniaarhuspubl:oai:pure.atira.dk:publications/534a4255-f539-4529-b5a8-313da5144293 2024-05-19T07:30:18+00:00 Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica Silva, Jônatas Pedro da Veloso, Tomás Gomes Reis Costa, Maurício Dutra Souza, José João Lelis Leal de Soares, Emanuelle Mercês Barros Gomes, Lucas Carvalho Schaefer, Carlos Ernesto G.R. 2024-01-15 https://pure.au.dk/portal/en/publications/534a4255-f539-4529-b5a8-313da5144293 https://doi.org/10.1016/j.envres.2023.117548 http://www.scopus.com/inward/record.url?scp=85181773278&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/534a4255-f539-4529-b5a8-313da5144293 info:eu-repo/semantics/openAccess Silva , J P D , Veloso , T G R , Costa , M D , Souza , J J L L D , Soares , E M B , Gomes , L C & Schaefer , C E G R 2024 , ' Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica ' , Environmental Research , vol. 241 , 117548 . https://doi.org/10.1016/j.envres.2023.117548 Bacterial V3–V4 region Fungal internal transcribed spacer 1 (ITS1) Metabarcoding Microbial diversity Microbial DNA sequencing Soil attributes article 2024 ftuniaarhuspubl https://doi.org/10.1016/j.envres.2023.117548 2024-04-24T23:46:28Z The retreat of glaciers in Antarctica has increased in the last decades due to global climate change, influencing vegetation expansion, and soil physico-chemical and biological attributes. However, little is known about soil microbiology diversity in these periglacial landscapes. This study characterized and compared bacterial and fungal diversity using metabarcoding of soil samples from the Byers Peninsula, Maritime Antarctica. We identified bacterial and fungal communities by amplification of bacterial 16 S rRNA region V3–V4 and fungal internal transcribed spacer 1 (ITS1). We also applied 14 C dating on soil organic matter (SOM) from six profiles. Physico-chemical analyses and attributes associated with SOM were evaluated. A total of 14,048 bacterial ASVs were obtained, and almost all samples had 50% of their sequences assigned to Actinobacteriota and Proteobacteria. Regarding the fungal community, Mortierellomycota, Ascomycota and Basidiomycota were the main phyla from 1619 ASVs. We found that soil age was more relevant than the distance from the glacier, with the oldest soil profile (late Holocene soil profile) hosting the highest bacterial and fungal diversity. The microbial indices of the fungal community were correlated with nutrient availability, soil reactivity and SOM composition, whereas the bacterial community was not correlated with any soil attribute. The bacterial diversity, richness, and evenness varied according to presence of permafrost and moisture regime. The fungal community richness in the surface horizon was not related to altitude, permafrost, or moisture regime. The soil moisture regime was crucial for the structure, high diversity and richness of the microbial community, specially to the bacterial community. Further studies should examine the relationship between microbial communities and environmental factors to better predict changes in this terrestrial ecosystem. Article in Journal/Newspaper Antarc* Antarctica permafrost Aarhus University: Research Environmental Research 241 117548 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Bacterial V3–V4 region Fungal internal transcribed spacer 1 (ITS1) Metabarcoding Microbial diversity Microbial DNA sequencing Soil attributes |
spellingShingle |
Bacterial V3–V4 region Fungal internal transcribed spacer 1 (ITS1) Metabarcoding Microbial diversity Microbial DNA sequencing Soil attributes Silva, Jônatas Pedro da Veloso, Tomás Gomes Reis Costa, Maurício Dutra Souza, José João Lelis Leal de Soares, Emanuelle Mercês Barros Gomes, Lucas Carvalho Schaefer, Carlos Ernesto G.R. Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica |
topic_facet |
Bacterial V3–V4 region Fungal internal transcribed spacer 1 (ITS1) Metabarcoding Microbial diversity Microbial DNA sequencing Soil attributes |
description |
The retreat of glaciers in Antarctica has increased in the last decades due to global climate change, influencing vegetation expansion, and soil physico-chemical and biological attributes. However, little is known about soil microbiology diversity in these periglacial landscapes. This study characterized and compared bacterial and fungal diversity using metabarcoding of soil samples from the Byers Peninsula, Maritime Antarctica. We identified bacterial and fungal communities by amplification of bacterial 16 S rRNA region V3–V4 and fungal internal transcribed spacer 1 (ITS1). We also applied 14 C dating on soil organic matter (SOM) from six profiles. Physico-chemical analyses and attributes associated with SOM were evaluated. A total of 14,048 bacterial ASVs were obtained, and almost all samples had 50% of their sequences assigned to Actinobacteriota and Proteobacteria. Regarding the fungal community, Mortierellomycota, Ascomycota and Basidiomycota were the main phyla from 1619 ASVs. We found that soil age was more relevant than the distance from the glacier, with the oldest soil profile (late Holocene soil profile) hosting the highest bacterial and fungal diversity. The microbial indices of the fungal community were correlated with nutrient availability, soil reactivity and SOM composition, whereas the bacterial community was not correlated with any soil attribute. The bacterial diversity, richness, and evenness varied according to presence of permafrost and moisture regime. The fungal community richness in the surface horizon was not related to altitude, permafrost, or moisture regime. The soil moisture regime was crucial for the structure, high diversity and richness of the microbial community, specially to the bacterial community. Further studies should examine the relationship between microbial communities and environmental factors to better predict changes in this terrestrial ecosystem. |
format |
Article in Journal/Newspaper |
author |
Silva, Jônatas Pedro da Veloso, Tomás Gomes Reis Costa, Maurício Dutra Souza, José João Lelis Leal de Soares, Emanuelle Mercês Barros Gomes, Lucas Carvalho Schaefer, Carlos Ernesto G.R. |
author_facet |
Silva, Jônatas Pedro da Veloso, Tomás Gomes Reis Costa, Maurício Dutra Souza, José João Lelis Leal de Soares, Emanuelle Mercês Barros Gomes, Lucas Carvalho Schaefer, Carlos Ernesto G.R. |
author_sort |
Silva, Jônatas Pedro da |
title |
Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica |
title_short |
Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica |
title_full |
Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica |
title_fullStr |
Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica |
title_full_unstemmed |
Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica |
title_sort |
microbial successional pattern along a glacier retreat gradient from byers peninsula, maritime antarctica |
publishDate |
2024 |
url |
https://pure.au.dk/portal/en/publications/534a4255-f539-4529-b5a8-313da5144293 https://doi.org/10.1016/j.envres.2023.117548 http://www.scopus.com/inward/record.url?scp=85181773278&partnerID=8YFLogxK |
genre |
Antarc* Antarctica permafrost |
genre_facet |
Antarc* Antarctica permafrost |
op_source |
Silva , J P D , Veloso , T G R , Costa , M D , Souza , J J L L D , Soares , E M B , Gomes , L C & Schaefer , C E G R 2024 , ' Microbial successional pattern along a glacier retreat gradient from Byers Peninsula, Maritime Antarctica ' , Environmental Research , vol. 241 , 117548 . https://doi.org/10.1016/j.envres.2023.117548 |
op_relation |
https://pure.au.dk/portal/en/publications/534a4255-f539-4529-b5a8-313da5144293 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.envres.2023.117548 |
container_title |
Environmental Research |
container_volume |
241 |
container_start_page |
117548 |
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1799485287372423168 |