Heterogeneity of microbial Communities in soils from the Antarctic peninsula region
Ice-free areas represent less than 1% of the Antarctic surface. However, climate change models predict a significant increase in temperatures in the coming decades, triggering a relevant reduction of the ice-covered surface. Microorganisms, adapted to the extreme and fluctuating conditions, are the...
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Online Access: | http://hdl.handle.net/10486/705850 https://doi.org/10.3389/fmicb.2021.628792 |
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ftuamadrid:oai:repositorio.uam.es:10486/705850 2023-05-15T13:31:21+02:00 Heterogeneity of microbial Communities in soils from the Antarctic peninsula region Almela Gómez, Pablo Justel Eusebio, Ana María Quesada del Corral, Antonio UAM. Departamento de Biología UAM. Departamento de Matemáticas 2023-01-11T15:39:11Z application/pdf http://hdl.handle.net/10486/705850 https://doi.org/10.3389/fmicb.2021.628792 eng eng Frontiers Media S.A. Frontiers in Microbiology 10.3389/fmicb.2021.628792 Gobierno de España. CTM2016-79741-R Gobierno de España. PCIN-2016- 001. Frontiers in Microbiology 12 (2021): 628792 1664302X http://hdl.handle.net/10486/705850 doi:10.3389/fmicb.2021.628792 628792-1 628792-13 12 Copyright © 2021 Almela, Justel and Quesada Reconocimiento openAccess microorgamisms soil distribution heterogeneity homogeneity Antarctica Biología y Biomedicina / Biología article info:eu-repo/semantics/publishedVersion 2023 ftuamadrid https://doi.org/10.3389/fmicb.2021.628792 2023-01-18T00:12:30Z Ice-free areas represent less than 1% of the Antarctic surface. However, climate change models predict a significant increase in temperatures in the coming decades, triggering a relevant reduction of the ice-covered surface. Microorganisms, adapted to the extreme and fluctuating conditions, are the dominant biota. In this article we analyze the diversity and composition of soil bacterial communities in 52 soil samples on three scales: (i) fine scale, where we compare the differences in the microbial community between top-stratum soils (0–2 cm) and deeper-stratum soils (5–10 cm) at the same sampling point; (ii) medium scale, in which we compare the composition of the microbial community of top-stratum soils from different sampling points within the same sampling location; and (iii) coarse scale, where we compare communities between comparable ecosystems located hundreds of kilometers apart along the Antarctic Peninsula. The results suggest that in ice-free soils exposed for longer periods of time (millennia) microbial communities are significantly different along the soil profiles. However, in recently (decades) deglaciated soils the communities are not different along the soil profile. Furthermore, the microbial communities found in soils at the different sampling locations show a high degree of heterogeneity, with a relevant proportion of unique amplicon sequence variants (ASV) that appeared mainly in low abundance, and only at a single sampling location. The Core90 community, defined as the ASVs shared by 90% of the soils from the 4 sampling locations, was composed of 26 ASVs, representing a small percentage of the total sequences. Nevertheless, the taxonomic composition of the Core80 (ASVs shared by 80% of sampling points per location) of the different sampling locations, was very similar, as they were mostly defined by 20 common taxa, representing up to 75.7% of the sequences of the Core80 communities, suggesting a greater homogeneity of soil bacterial taxa among distant locations Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Universidad Autónoma de Madrid (UAM): Biblos-e Archivo Antarctic Antarctic Peninsula The Antarctic Frontiers in Microbiology 12 |
institution |
Open Polar |
collection |
Universidad Autónoma de Madrid (UAM): Biblos-e Archivo |
op_collection_id |
ftuamadrid |
language |
English |
topic |
microorgamisms soil distribution heterogeneity homogeneity Antarctica Biología y Biomedicina / Biología |
spellingShingle |
microorgamisms soil distribution heterogeneity homogeneity Antarctica Biología y Biomedicina / Biología Almela Gómez, Pablo Justel Eusebio, Ana María Quesada del Corral, Antonio Heterogeneity of microbial Communities in soils from the Antarctic peninsula region |
topic_facet |
microorgamisms soil distribution heterogeneity homogeneity Antarctica Biología y Biomedicina / Biología |
description |
Ice-free areas represent less than 1% of the Antarctic surface. However, climate change models predict a significant increase in temperatures in the coming decades, triggering a relevant reduction of the ice-covered surface. Microorganisms, adapted to the extreme and fluctuating conditions, are the dominant biota. In this article we analyze the diversity and composition of soil bacterial communities in 52 soil samples on three scales: (i) fine scale, where we compare the differences in the microbial community between top-stratum soils (0–2 cm) and deeper-stratum soils (5–10 cm) at the same sampling point; (ii) medium scale, in which we compare the composition of the microbial community of top-stratum soils from different sampling points within the same sampling location; and (iii) coarse scale, where we compare communities between comparable ecosystems located hundreds of kilometers apart along the Antarctic Peninsula. The results suggest that in ice-free soils exposed for longer periods of time (millennia) microbial communities are significantly different along the soil profiles. However, in recently (decades) deglaciated soils the communities are not different along the soil profile. Furthermore, the microbial communities found in soils at the different sampling locations show a high degree of heterogeneity, with a relevant proportion of unique amplicon sequence variants (ASV) that appeared mainly in low abundance, and only at a single sampling location. The Core90 community, defined as the ASVs shared by 90% of the soils from the 4 sampling locations, was composed of 26 ASVs, representing a small percentage of the total sequences. Nevertheless, the taxonomic composition of the Core80 (ASVs shared by 80% of sampling points per location) of the different sampling locations, was very similar, as they were mostly defined by 20 common taxa, representing up to 75.7% of the sequences of the Core80 communities, suggesting a greater homogeneity of soil bacterial taxa among distant locations |
author2 |
UAM. Departamento de Biología UAM. Departamento de Matemáticas |
format |
Article in Journal/Newspaper |
author |
Almela Gómez, Pablo Justel Eusebio, Ana María Quesada del Corral, Antonio |
author_facet |
Almela Gómez, Pablo Justel Eusebio, Ana María Quesada del Corral, Antonio |
author_sort |
Almela Gómez, Pablo |
title |
Heterogeneity of microbial Communities in soils from the Antarctic peninsula region |
title_short |
Heterogeneity of microbial Communities in soils from the Antarctic peninsula region |
title_full |
Heterogeneity of microbial Communities in soils from the Antarctic peninsula region |
title_fullStr |
Heterogeneity of microbial Communities in soils from the Antarctic peninsula region |
title_full_unstemmed |
Heterogeneity of microbial Communities in soils from the Antarctic peninsula region |
title_sort |
heterogeneity of microbial communities in soils from the antarctic peninsula region |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
http://hdl.handle.net/10486/705850 https://doi.org/10.3389/fmicb.2021.628792 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
Frontiers in Microbiology 10.3389/fmicb.2021.628792 Gobierno de España. CTM2016-79741-R Gobierno de España. PCIN-2016- 001. Frontiers in Microbiology 12 (2021): 628792 1664302X http://hdl.handle.net/10486/705850 doi:10.3389/fmicb.2021.628792 628792-1 628792-13 12 |
op_rights |
Copyright © 2021 Almela, Justel and Quesada Reconocimiento openAccess |
op_doi |
https://doi.org/10.3389/fmicb.2021.628792 |
container_title |
Frontiers in Microbiology |
container_volume |
12 |
_version_ |
1766017639967096832 |