Distribution and diversity of soil microfauna from East Antarctica: assessing the link between biotic and abiotic factors.

Terrestrial life in Antarctica has been described as some of the simplest on the planet, and mainly confined to soil microfaunal communities. Studies have suggested that the lack of diversity is due to extreme environmental conditions and thought to be driven by abiotic factors. In this study we inv...

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Autores principales:	Alejandro Velasco-Castrillón, Mark B Schultz, Federica Colombo, John A E Gibson, Kerrie A Davies, Andrew D Austin, Mark I Stevens
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4e18b91e67714b17a7066a9ae46bf5ce
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spelling	oai:doaj.org-article:4e18b91e67714b17a7066a9ae46bf5ce2021-11-18T08:34:31ZDistribution and diversity of soil microfauna from East Antarctica: assessing the link between biotic and abiotic factors.1932-620310.1371/journal.pone.0087529https://doaj.org/article/4e18b91e67714b17a7066a9ae46bf5ce2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24498126/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Terrestrial life in Antarctica has been described as some of the simplest on the planet, and mainly confined to soil microfaunal communities. Studies have suggested that the lack of diversity is due to extreme environmental conditions and thought to be driven by abiotic factors. In this study we investigated soil microfauna composition, abundance, and distribution in East Antarctica, and assessed correlations with soil geochemistry and environmental variables. We examined 109 soil samples from a wide range of ice-free habitats, spanning 2000 km from Framnes Mountains to Bailey Peninsula. Microfauna across all samples were patchily distributed, from complete absence of invertebrates to over 1600 specimens/gram of dry weight of soil (gdw), with highest microfauna abundance observed in samples with visible vegetation. Bdelloid rotifers were on average the most widespread found in 87% of sampled sites and the most abundant (44 specimens/gdw). Tardigrades occurred in 57% of the sampled sites with an abundance of 12 specimens/gdw. Nematodes occurred in 71% of samples with a total abundance of 3 specimens/gdw. Ciliates and mites were rarely found in soil samples, with an average abundance of 1.3 and 0.04 specimens/gdw, respectively. We found that microfaunal composition and abundance were mostly correlated with the soil geochemical parameters; phosphorus, NO3 (-) and salinity, and likely to be the result of soil properties and historic landscape formation and alteration, rather than the geographic region they were sampled from. Studies focusing on Antarctic biodiversity must take into account soil geochemical and environmental factors that influence population and species heterogeneity.Alejandro Velasco-CastrillónMark B SchultzFederica ColomboJohn A E GibsonKerrie A DaviesAndrew D AustinMark I StevensPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 1, p e87529 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alejandro Velasco-Castrillón Mark B Schultz Federica Colombo John A E Gibson Kerrie A Davies Andrew D Austin Mark I Stevens Distribution and diversity of soil microfauna from East Antarctica: assessing the link between biotic and abiotic factors.
description	Terrestrial life in Antarctica has been described as some of the simplest on the planet, and mainly confined to soil microfaunal communities. Studies have suggested that the lack of diversity is due to extreme environmental conditions and thought to be driven by abiotic factors. In this study we investigated soil microfauna composition, abundance, and distribution in East Antarctica, and assessed correlations with soil geochemistry and environmental variables. We examined 109 soil samples from a wide range of ice-free habitats, spanning 2000 km from Framnes Mountains to Bailey Peninsula. Microfauna across all samples were patchily distributed, from complete absence of invertebrates to over 1600 specimens/gram of dry weight of soil (gdw), with highest microfauna abundance observed in samples with visible vegetation. Bdelloid rotifers were on average the most widespread found in 87% of sampled sites and the most abundant (44 specimens/gdw). Tardigrades occurred in 57% of the sampled sites with an abundance of 12 specimens/gdw. Nematodes occurred in 71% of samples with a total abundance of 3 specimens/gdw. Ciliates and mites were rarely found in soil samples, with an average abundance of 1.3 and 0.04 specimens/gdw, respectively. We found that microfaunal composition and abundance were mostly correlated with the soil geochemical parameters; phosphorus, NO3 (-) and salinity, and likely to be the result of soil properties and historic landscape formation and alteration, rather than the geographic region they were sampled from. Studies focusing on Antarctic biodiversity must take into account soil geochemical and environmental factors that influence population and species heterogeneity.
format	article
author	Alejandro Velasco-Castrillón Mark B Schultz Federica Colombo John A E Gibson Kerrie A Davies Andrew D Austin Mark I Stevens
author_facet	Alejandro Velasco-Castrillón Mark B Schultz Federica Colombo John A E Gibson Kerrie A Davies Andrew D Austin Mark I Stevens
author_sort	Alejandro Velasco-Castrillón
title	Distribution and diversity of soil microfauna from East Antarctica: assessing the link between biotic and abiotic factors.
title_short	Distribution and diversity of soil microfauna from East Antarctica: assessing the link between biotic and abiotic factors.
title_full	Distribution and diversity of soil microfauna from East Antarctica: assessing the link between biotic and abiotic factors.
title_fullStr	Distribution and diversity of soil microfauna from East Antarctica: assessing the link between biotic and abiotic factors.
title_full_unstemmed	Distribution and diversity of soil microfauna from East Antarctica: assessing the link between biotic and abiotic factors.
title_sort	distribution and diversity of soil microfauna from east antarctica: assessing the link between biotic and abiotic factors.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/4e18b91e67714b17a7066a9ae46bf5ce
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Distribution and diversity of soil microfauna from East Antarctica: assessing the link between biotic and abiotic factors.

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