The genetic consequences of habitat specificity for fig trees in southern African fragmented forests

Show simple item record Deng, Jun-Yin Van Noort, Simon Compton, Stephen G. Chen, Yan Greeff, Jaco M. (Jacobus Maree) 2020-05-12T15:18:57Z 2020-01
dc.description.abstract Theory predicts that fragmentation will lead to reduced gene flow between populations, with loss of genetic diversity and increased population differentiation. However, these predictions may not always hold true, especially for long-lived woody plants and some fig trees (Ficus species) may not be affected by fragmentation because their fig wasps can transfer pollen for distances of over 100 km. Here we contrast the extent of genetic isolation caused by fragmentation among three southern African Ficus species with different habitat dependencies and distributional ranges. Two of the species are restricted to forest environments, which have been fragmented since at least the Pleistocene, and provide an indication of the long-term genetic effects of forest fragmentation. The third species is less forest-dependent, with a more general habitat association and more continuous populations. We found significant population differentiation in all three species. Populations of F. bizanae, a forest specialist with a highly restricted distribution, displayed the most genetic structure, followed by the second forest specialist, F. craterostoma. Populations of the habitat-generalist F. sur were the least genetically structured. Forest specialist Ficus species are clearly not immune to habitat fragmentation, despite extensive pollen flow, and other southern African forest trees are likely to have experienced similar or greater effects of habitat fragmentation. The strong genetic structure of F. bizanae suggests a limited seed dispersal range and local dispersal by the fig wasp pollinator, a possible adaptation to the limited range of its host fig tree. en_ZA
dc.description.department Biochemistry en_ZA
dc.description.department Genetics en_ZA
dc.description.department Microbiology and Plant Pathology en_ZA
dc.description.embargo 2021-01-01
dc.description.librarian am2020 en_ZA
dc.description.sponsorship The National Research Foundation (NRF) of South Africa en_ZA
dc.description.uri en_ZA
dc.identifier.citation Deng, J.-Y., Van Noort, S., Compton, S.G. et al. 2020, 'The genetic consequences of habitat specificity for fig trees in southern African fragmented forests', Acta Oecologica, vol. 102, art. 103506, pp. 1-8. en_ZA
dc.identifier.issn 1146-609X (print)
dc.identifier.issn 1873-6238 (online)
dc.identifier.other 10.1016/j.actao.2019.103506
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2019 Elsevier Masson SAS. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Acta Oecologica. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Acta Oecologica, vol. 102, art. 103506, pp. 1-8, 2020. doi : 10.1016/j.actao.2019.103506. en_ZA
dc.subject Population differentiation en_ZA
dc.subject Gene flow en_ZA
dc.subject Genetic diversity en_ZA
dc.subject Niche breath en_ZA
dc.title The genetic consequences of habitat specificity for fig trees in southern African fragmented forests en_ZA
dc.type Postprint Article en_ZA

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