A novel phylogenetic regionalization of phytogeographical zones of southern Africa reveals their hidden evolutionary affinities

Show simple item record

dc.contributor.author Daru, Barnabas H.
dc.contributor.author Van der Bank, Michelle
dc.contributor.author Maurin, O.
dc.contributor.author Yessoufou, Kowiyou
dc.contributor.author Schaefer, Hanno
dc.contributor.author Slingsby, Jasper A.
dc.contributor.author Davies, T. Jonathan
dc.date.accessioned 2016-03-11T08:37:20Z
dc.date.issued 2016-01
dc.description.abstract AIM : Although existing bioregional classification schemes often consider the compositional affinities within regional biotas, they do not typically incorporate phylogenetic information explicitly. Because phylogeny captures information on the evolutionary history of taxa, it provides a powerful tool for delineating biogeographical boundaries and for establishing relationships among them. Here, we present the first vegetation delineation of the woody flora of southern Africa based upon evolutionary relationships. LOCATION : Southern Africa. METHODS : We used a published time-calibrated phylogenetic tree for 1400 woody plant species along with their geographical distributions and a metric of phylogenetic beta diversity to generate a phylogenetic delineation of the woody vegetation of southern Africa. We then explored environmental correlates of phylogenetic turnover between them, and the evolutionary distinctiveness of the taxa within them. RESULTS : We identified 15 phylogenetically distinct biogeographical units, here referred to as phyloregions. The largest phyloregion broadly overlaps with Savanna vegetation, while the phyloregion overlapping with the south-western portion of the Fynbos biome is the most evolutionarily distinct. Potential evapotranspiration and mean annual temperature differ significantly among phyloregions and correlate with patterns of phylogenetic beta diversity between them. Our phylogeny-based delimitation of southern Africa’s woody vegetation broadly matches currently recognized phytogeographical classifications, but also highlights parts of the Namib Karoo and Greater Limpopo Transfrontier Park as distinct, but previously under-recognized biogeographical units. MAIN CONCLUSIONS : Our analysis provides new insights into the structure and phylogenetic relationships among the woody flora of southern Africa. We show that evolutionary affinities differentiate phyloregions closely resembling existing vegetation classifications, yet also identify ‘cryptic’ phyloregions that are as evolutionarily distinct as some of the recognized African vegetation types. en_ZA
dc.description.embargo 2017-01-31
dc.description.librarian hb2015 en_ZA
dc.description.sponsorship Government of Canada through Genome Canada and the Ontario Genomics Institute (2008-OGI-ICI-03), the International Development Research Centre (IDRC) Canada, the University of Johannesburg and the South African National Research Foundation (NRF). en_ZA
dc.description.uri http://onlinelibrary.wiley.com/doi/10.1111/jbi.12619 en_ZA
dc.identifier.citation Daru, BH, Van der Bank, M, Maurin, O, Yessoufou, K, Schaefer, H, Slingsby, JA & Davies, TJ 2016, 'A novel phylogenetic regionalization of phytogeographical zones of southern Africa reveals their hidden evolutionary affinities', Journal of Biogeography, vol. 43, no. 1, pp. 155-166. en_ZA
dc.identifier.issn 0305-0270 (print)
dc.identifier.issn 1365-2699 (online)
dc.identifier.other 10.1111/jbi.12619
dc.identifier.uri http://hdl.handle.net/2263/51796
dc.language.iso en en_ZA
dc.publisher Wiley en_ZA
dc.rights © 2015 John Wiley and Sons Ltd. This is the pre-peer reviewed version of the following article : A novel phylogenetic regionalization of phytogeographical zones of southern Africa reveals their hidden evolutionary affinities, Journal of Biogeography, vol. 43, no.1, pp. 155-166, 2016. doi : 10.1111/jbi.12619. The definite version is available at : http://onlinelibrary.wiley.com/doi/10.1111/jbi.12619. en_ZA
dc.subject Cluster analysis en_ZA
dc.subject Evolutionary distinctiveness en_ZA
dc.subject Phylogenetic beta diversity en_ZA
dc.subject Phyloregions en_ZA
dc.subject Southern Africa en_ZA
dc.subject Vegetation types en_ZA
dc.subject Woody flora en_ZA
dc.subject Biogeographical regionalization en_ZA
dc.subject Biomes en_ZA
dc.title A novel phylogenetic regionalization of phytogeographical zones of southern Africa reveals their hidden evolutionary affinities en_ZA
dc.type Postprint Article en_ZA


Files in this item

This item appears in the following Collection(s)

Show simple item record