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At limits of life: Multidisciplinary insights reveal environmental constraints on biotic diversity in Continental Antarctica

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dc.contributor.author Magalhães, Catarina
dc.contributor.author Stevens, Mark I.
dc.contributor.author Cary, S. Craig
dc.contributor.author Ball, Becky A.
dc.contributor.author Storey, Bryan
dc.contributor.author Wall, Diana H.
dc.contributor.author Türk, Roman
dc.contributor.author Ruprecht, Ulrike
dc.date.accessioned 2012-10-11T21:17:48Z
dc.date.available 2012-10-11T21:17:48Z
dc.date.copyright 2012-09-19
dc.date.issued 2012
dc.identifier.citation Magalhães, C., Stevens, M. I., Cary, S. C., Ball, B. A., Storey, B., Wall, D. H., Türk, R., et al. (2012). At limits of life: Multidisciplinary insights reveal environmental constraints on biotic diversity in Continental Antarctica. PLoS ONE, 7(9), e44578. en_NZ
dc.identifier.issn 1932-6203
dc.identifier.uri http://hdl.handle.net/10289/6715
dc.description.abstract Multitrophic communities that maintain the functionality of the extreme Antarctic terrestrial ecosystems, while the simplest of any natural community, are still challenging our knowledge about the limits to life on earth. In this study, we describe and interpret the linkage between the diversity of different trophic level communities to the geological morphology and soil geochemistry in the remote Transantarctic Mountains (Darwin Mountains, 80°S). We examined the distribution and diversity of biota (bacteria, cyanobacteria, lichens, algae, invertebrates) with respect to elevation, age of glacial drift sheets, and soil physicochemistry. Results showed an abiotic spatial gradient with respect to the diversity of the organisms across different trophic levels. More complex communities, in terms of trophic level diversity, were related to the weakly developed younger drifts (Hatherton and Britannia) with higher soil C/N ratio and lower total soluble salts content (thus lower conductivity). Our results indicate that an increase of ion concentration from younger to older drift regions drives a succession of complex to more simple communities, in terms of number of trophic levels and diversity within each group of organisms analysed. This study revealed that integrating diversity across multi-trophic levels of biotic communities with abiotic spatial heterogeneity and geological history is fundamental to understand environmental constraints influencing biological distribution in Antarctic soil ecosystems en_NZ
dc.format.mimetype application/pdf
dc.language.iso en
dc.publisher Public Library of Science en_NZ
dc.relation.ispartof PLoS ONE
dc.rights ©2012 Magalhães et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. en_NZ
dc.title At limits of life: Multidisciplinary insights reveal environmental constraints on biotic diversity in Continental Antarctica en_NZ
dc.type Journal Article en_NZ
dc.identifier.doi 10.1371/journal.pone.0044578 en_NZ


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