Inter-Valley Soil Comparative Survey of the McMurdo Dry Valleys
Recent applications of molecular genetics to edaphic microbial communities of the McMurdo Dry Valleys and elsewhere have rejected a long-held belief that Antarctic soils contain extremely limited microbial diversity. The Inter-Valley Soil Comparative Survey aims to elucidate the factors shaping thes...
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SCAR - Microbial Antarctic Resource System
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ftdatacite:10.15468/xlx4gw 2023-05-15T13:59:31+02:00 Inter-Valley Soil Comparative Survey of the McMurdo Dry Valleys Lee, Charles 2014 https://dx.doi.org/10.15468/xlx4gw http://www.gbif.org/dataset/cca539d1-3e43-49bb-8e1f-8c1bda934a8c en eng SCAR - Microbial Antarctic Resource System https://dx.doi.org/10.1038/ismej.2011.170 METADATA dataset Dataset 2014 ftdatacite https://doi.org/10.15468/xlx4gw https://doi.org/10.1038/ismej.2011.170 2021-11-05T12:55:41Z Recent applications of molecular genetics to edaphic microbial communities of the McMurdo Dry Valleys and elsewhere have rejected a long-held belief that Antarctic soils contain extremely limited microbial diversity. The Inter-Valley Soil Comparative Survey aims to elucidate the factors shaping these unique microbial communities and their biogeography by integrating molecular genetic approaches with biogeochemical analyses. Although the microbial communities of Dry Valley soils may be complex, there is little doubt that the ecosystem’s food web is relatively simple, and evidence suggests that physicochemical conditions may have the dominant role in shaping microbial communities. To examine this hypothesis, bacterial communities from representative soil samples collected in four geographically disparate Dry Valleys were analyzed using molecular genetic tools, including pyrosequencing of 16S rRNA gene PCR amplicons. Results show that the four communities are structurally and phylogenetically distinct, and possess significantly different levels of diversity. Strikingly, only 2 of 214 phylotypes were found in all four valleys, challenging a widespread assumption that the microbiota of the Dry Valleys is composed of a few cosmopolitan species. Analysis of soil geochemical properties indicated that salt content, alongside altitude and Cu2+, was significantly correlated with differences in microbial communities. Our results indicate that the microbial ecology of Dry Valley soils is highly localized and that physicochemical factors potentially have major roles in shaping the microbiology of ice-free areas of Antarctica. These findings hint at links between Dry Valley glacial geomorphology and microbial ecology, and raise previously unrecognized issues related to environmental management of this unique ecosystem. Dataset Antarc* Antarctic Antarctica McMurdo Dry Valleys DataCite Metadata Store (German National Library of Science and Technology) Antarctic McMurdo Dry Valleys |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
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English |
description |
Recent applications of molecular genetics to edaphic microbial communities of the McMurdo Dry Valleys and elsewhere have rejected a long-held belief that Antarctic soils contain extremely limited microbial diversity. The Inter-Valley Soil Comparative Survey aims to elucidate the factors shaping these unique microbial communities and their biogeography by integrating molecular genetic approaches with biogeochemical analyses. Although the microbial communities of Dry Valley soils may be complex, there is little doubt that the ecosystem’s food web is relatively simple, and evidence suggests that physicochemical conditions may have the dominant role in shaping microbial communities. To examine this hypothesis, bacterial communities from representative soil samples collected in four geographically disparate Dry Valleys were analyzed using molecular genetic tools, including pyrosequencing of 16S rRNA gene PCR amplicons. Results show that the four communities are structurally and phylogenetically distinct, and possess significantly different levels of diversity. Strikingly, only 2 of 214 phylotypes were found in all four valleys, challenging a widespread assumption that the microbiota of the Dry Valleys is composed of a few cosmopolitan species. Analysis of soil geochemical properties indicated that salt content, alongside altitude and Cu2+, was significantly correlated with differences in microbial communities. Our results indicate that the microbial ecology of Dry Valley soils is highly localized and that physicochemical factors potentially have major roles in shaping the microbiology of ice-free areas of Antarctica. These findings hint at links between Dry Valley glacial geomorphology and microbial ecology, and raise previously unrecognized issues related to environmental management of this unique ecosystem. |
format |
Dataset |
author |
Lee, Charles |
spellingShingle |
Lee, Charles Inter-Valley Soil Comparative Survey of the McMurdo Dry Valleys |
author_facet |
Lee, Charles |
author_sort |
Lee, Charles |
title |
Inter-Valley Soil Comparative Survey of the McMurdo Dry Valleys |
title_short |
Inter-Valley Soil Comparative Survey of the McMurdo Dry Valleys |
title_full |
Inter-Valley Soil Comparative Survey of the McMurdo Dry Valleys |
title_fullStr |
Inter-Valley Soil Comparative Survey of the McMurdo Dry Valleys |
title_full_unstemmed |
Inter-Valley Soil Comparative Survey of the McMurdo Dry Valleys |
title_sort |
inter-valley soil comparative survey of the mcmurdo dry valleys |
publisher |
SCAR - Microbial Antarctic Resource System |
publishDate |
2014 |
url |
https://dx.doi.org/10.15468/xlx4gw http://www.gbif.org/dataset/cca539d1-3e43-49bb-8e1f-8c1bda934a8c |
geographic |
Antarctic McMurdo Dry Valleys |
geographic_facet |
Antarctic McMurdo Dry Valleys |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys |
op_relation |
https://dx.doi.org/10.1038/ismej.2011.170 |
op_doi |
https://doi.org/10.15468/xlx4gw https://doi.org/10.1038/ismej.2011.170 |
_version_ |
1766268099602939904 |