Cyanobacteria drive community composition and functionality in rock-soil interface communities

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dc.contributor.author Valverde, Angel
dc.contributor.author Makhalanyane, Thulani P.
dc.contributor.author Seely, Mary
dc.contributor.author Cowan, Don A.
dc.date.accessioned 2015-03-05T10:55:21Z
dc.date.available 2015-03-05T10:55:21Z
dc.date.issued 2015-02
dc.description.abstract Most ecological research on hypoliths, significant primary producers in hyperarid deserts, has focused on the diversity of individual groups of microbes (i.e. bacteria). However, microbial communities are inherently complex, and the interactions between cyanobacteria, heterotrophic bacteria, protista and metazoa, are likely to be very important for ecosystem functioning. Cyanobacterial and heterotrophic bacterial communities were analysed by pyrosequencing, while metazoan and protistan communities were assessed by T-RFLP analysis. Microbial functionality was estimated using carbon substrate utilization. Cyanobacterial community composition was significant in shaping community structure and function in hypoliths. Ecological network analysis showed that most significant co-occurrences were positive, representing potential synergistic interactions. There were several highly interconnected associations (modules) and specific cyanobacteria were important in driving the modular structure of hypolithic networks. Together, our results suggest that hypolithic cyanobacteria have strong effects on higher trophic levels and ecosystem functioning. en_ZA
dc.description.embargo 2016-02-28 en_ZA
dc.description.librarian hb2015 en_ZA
dc.description.sponsorship National Research Foundation (South Africa) and the University of Pretoria. en_ZA
dc.description.uri http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1755-0998 en_ZA
dc.identifier.citation Valverde, A, Makhalanyane, TP, Seely, M & Cowan, DA 2015, 'Cyanobacteria drive community composition and functionality in rock-soil interface communities', Molecular Ecology, vol. 24, no. 4, pp. 812-821. en_ZA
dc.identifier.issn 0962-1083 (print)
dc.identifier.issn 1365-294X (online)
dc.identifier.other 10.1111/mec.13068
dc.identifier.uri http://hdl.handle.net/2263/43880
dc.language.iso en en_ZA
dc.publisher Wiley en_ZA
dc.rights © John Wiley and Sons Ltd. This is the pre-peer reviewed version of the following article : Cyanobacteria drive community composition and functionality in rock-soil interface communities, Molecular Ecology, vol. 24, no. 4, pp. 812-821, 2015. doi :10.1111/mec.13068 . en_ZA
dc.subject Cyanobacteria en_ZA
dc.subject Heterotrophic bacteria en_ZA
dc.subject Hypoliths en_ZA
dc.subject Metazoa en_ZA
dc.subject Network analysis en_ZA
dc.subject Protozoa en_ZA
dc.title Cyanobacteria drive community composition and functionality in rock-soil interface communities en_ZA
dc.type Postprint Article en_ZA


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