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dc.contributor.author Sanyika, TW
dc.contributor.author Stafford, William HL
dc.contributor.author Cowan, DA
dc.date.accessioned 2013-04-18T10:46:53Z
dc.date.available 2013-04-18T10:46:53Z
dc.date.issued 2012-08
dc.identifier.citation Sanyika, T.W, Stafford, W, Cowan, D.A. 2012. The soil and plant determinants of community structures of the dominant actinobacteria in Marion Island terrestrial habitats, Sub-Antarctica. Polar Biology, vol. 35(8), pp 1129-1141 en_US
dc.identifier.issn 0722-4060
dc.identifier.uri http://link.springer.com/content/pdf/10.1007/s00300-012-1160-0
dc.identifier.uri http://hdl.handle.net/10204/6697
dc.description Copyright: 2012 Springer Verlag. This is an ABSTRACT ONLY. The definitive version is published in Polar Biology, vol. 35(8), pp 1129-1141 en_US
dc.description.abstract Marion Island is a Sub-Antarctic island made up of distinct ecological habitats based on soil physiochemical, plant cover and physical characteristics. The microbial diversity and ecological determinants in this harsh Sub-Antarctic environment are largely uncharacterized. Actinobacteria have diverse ecological functions related to soil and plant functioning. This study was aimed at characterizing the diversity and community structures of the dominant actinobacteria in the distinct habitats and to identify their determinant soil and plant characteristics. Using the 16S rRNA gene, the denaturing gradient gel electrophoresis patterns and clone library diversity were correlated with the soil and plant characteristics. Multivariate statistical methods were also used to identify determinant soil and plant characteristics. Salinity and pH were the most important soil determinants, and a number of important site-specific plant species may have been important. The Coastal Fellfield Habitat was dominated by sequences of the suborders Micrococcineae (44%) and Propionibacterineae (18%), with salinity identified as the principal determinant. The Cotula Herbfield Habitat was dominated by Frankineae (37%) and Streptosporangineae (38%), which were correlated with organic nutrient concentrations. The Wet Mire Habitat was dominated by Acidimicrobineae (61%), with moisture and organic carbon content as principal components. Culture-dependent studies were complementary to culture-independent studies with the majority of actinobacteria isolated not identified in 16S rRNA gene clone libraries. This study demonstrates how the soil physiochemical characteristics and plant species independently determine the community structures of the dominant actinobacteria in distinct ecological habitats. These factors subsequently influence their ecological adaptation, roles and functions. en_US
dc.language.iso en en_US
dc.publisher Springer Verlag en_US
dc.relation.ispartofseries Workflow;9377
dc.subject Actinobacteria en_US
dc.subject Marion Island terrestrial habitats en_US
dc.subject Soil determinants en_US
dc.subject Plant determinants en_US
dc.subject Microbial diversity en_US
dc.subject Sub-Antarctic environment en_US
dc.title The soil and plant determinants of community structures of the dominant actinobacteria in Marion Island terrestrial habitats, Sub-Antarctica en_US
dc.type Article en_US


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