2024-03-28T19:55:35Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1597482021-12-27T16:20:21Zcom_10261_12com_10261_8com_10261_44com_10261_4col_10261_265col_10261_297
DIGITAL.CSIC
author
Mairal, Mario
author
Sanmartín, Isabel
author
Herrero, Alberto
author
Pokorny, L.
author
Vargas, Pablo
author
Aldasoro, J.J.
author
Alarcón, M.
funder
Ministerio de Economía, Industria y Competitividad (España)
2018-01-26T16:23:25Z
2018-01-26T16:23:25Z
2017
Scientific Reports 7 : 13 p. (2017)
http://hdl.handle.net/10261/159748
10.1038/srep45749
http://dx.doi.org/10.13039/501100010198
28397796
The Eastern African Afromontane forest is getting increased attention in conservation studies because of its high endemicity levels and shrinking geographic distribution. Phylogeographic studies have found evidence of high levels of genetic variation structured across the Great Rift System. Here, we use the epiphytic plant species Canarina eminii to explore causal explanations for this pattern. Phylogeographic analyses were undertaken using plastid regions and AFLP fragments. Population genetic analyses, Statistical Parsimony, and Bayesian methods were used to infer genetic diversity, genealogical relationships, structure, gene flow barriers, and the spatiotemporal evolution of populations. A strong phylogeographic structure was found, with two reciprocally monophyletic lineages on each side of the Great Rift System, high genetic exclusivity, and restricted gene flow among mountain ranges. We explain this pattern by topographic and ecological changes driven by geological rifting in Eastern Africa. Subsequent genetic structure is attributed to Pleistocene climatic changes, in which sky-islands acted as long-Term refuges and cradles of genetic diversity. Our study highlights the importance of climate change and geographic barriers associated with the African Rift System in shaping population genetic patterns, as well as the need to preserve the high levels of exclusive and critically endangered biodiversity harboured by current patches of the Afromontane forest.
eng
openAccess
Geographic barriers and Pleistocene climate change shaped patterns of genetic variation in the Eastern Afromontane biodiversity hotspot
artículo
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URL
https://digital.csic.es/bitstream/10261/159748/1/Sanmartin_Geographic%20barriers.pdf
File
MD5
20fb8e81d2b8598abe490bfff21aa5f7
1628296
application/pdf
Sanmartin_Geographic barriers.pdf