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Leaps and bounds : geographical and ecological distance constrained the colonisation of the Afrotemperate by Erica

Title data

Pirie, Michael D. ; Kandziora, Martha ; Nürk, Nicolai M. ; Le Maitre, Nicholas C. ; Mugrabi de Kuppler, Ana ; Gehrke, Berit ; Oliver, Edward G. H. ; Bellstedt, Dirk U.:
Leaps and bounds : geographical and ecological distance constrained the colonisation of the Afrotemperate by Erica.
In: BMC Evolutionary Biology. Vol. 19 (December 2019) . - No. 222.
ISSN 1471-2148
DOI: https://doi.org/10.1186/s12862-019-1545-6

Abstract in another language

Background: The coincidence of long distance dispersal (LDD) and biome shift is assumed to be the result of a multifaceted interplay between geographical distance and ecological suitability of source and sink areas. Here, we test the influence of these factors on the dispersal history of the flowering plant genus Erica (Ericaceae) across the Afrotemperate. We quantify similarity of Erica climate niches per biogeographic area using direct observations of species, and test various colonisation scenarios while estimating ancestral areas for the Erica clade using parametric biogeographic model testing.Results: We infer that the overall dispersal history of Erica across the Afrotemperate is the result of infrequent colonisation limited by geographic proximity and niche similarity. However, the Drakensberg Mountains represent a colonisation sink, rather than acting as a “stepping stone” between more distant and ecologically dissimilar Cape and Tropical African regions. Strikingly, the most dramatic examples of species radiations in Erica were the result of single unique dispersals over longer distances between ecologically dissimilar areas, contradicting the rule of phylogenetic biome conservatism.Conclusions: These results highlight the roles of geographical and ecological distance in limiting LDD, but also the importance of rare biome shifts, in which a unique dispersal event fuels evolutionary radiation.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER154670
Keywords: Afrotemperate; Historical biogeography; Phylogenetic biome conservatism; Cape floristic region; Climatic niche shift; Erica; Evolution; Madagascar; Model testing
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics > Chair Plant Systematics - Univ.-Prof. Dr. Sigrid Liede-Schumann
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 570 Life sciences, biology
500 Science > 580 Plants (Botany)
Date Deposited: 28 Jan 2020 07:44
Last Modified: 28 Jan 2020 08:29
URI: https://eref.uni-bayreuth.de/id/eprint/53776