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Molecular phylogeny of the Indian Ocean Terpsiphone paradise flycatchers: Undetected evolutionary diversity revealed amongst island populations

Bristol, Rachel M., Fabre, Pierre-Henri, Irestedt, Martin, Jønsson, Knud A., Shah, Nirmal J., Tatayah, Vikash, Warren, Ben H., Groombridge, Jim J. (2013) Molecular phylogeny of the Indian Ocean Terpsiphone paradise flycatchers: Undetected evolutionary diversity revealed amongst island populations. Molecular Phylogenetics and Evolution, 67 (2). pp. 336-347. ISSN 1055-7903. (doi:10.1016/j.ympev.2013.01.019) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://doi.org/10.1016/j.ympev.2013.01.019

Abstract

We construct a molecular phylogeny of Terpsiphone flycatchers of the Indian Ocean and use this to investigate their evolutionary relationships. A total of 4.4 kb of mitochondrial (cyt-b, ND3, ND2, control region) and nuclear (G3PDH, MC1R) sequence data were obtained from all species, sub-species and island populations of the region. Colonisation of the western Indian Ocean has been within the last two million years and greatly postdates the formation of the older islands of the region. A minimum of two independent continent-island colonisation events must have taken place in order to explain the current distribution and phylogenetic placement of Terpsiphone in this region. While five well-diverged Indian Ocean clades are detected, the relationship between them is unclear. Short intermodal branches are indicative of rapid range expansion across the region, masking exact routes and chronology of colonisation. The Indian Ocean Terpsiphone taxa fall into five well supported clades, two of which (the Seychelles paradise flycatcher and the Mascarene paradise flycatcher) correspond with currently recognised species, whilst a further three (within the Madagascar paradise flycatcher) are not entirely predicted by taxonomy, and are neither consistent with distance-based nor island age-based models of colonisation. We identify the four non-Mascarene clades as Evolutionarily Significant Units (ESUs), while the Mascarene paradise flycatcher contains two ESUs corresponding to the Mauritius and Réunion subspecies. All six ESUs are sufficiently diverged to be worthy of management as if they were separate species. This phylogenetic reconstruction highlights the importance of sub-specific molecular phylogenetic reconstructions in complex island archipelago settings in clarifying phylogenetic history and ESUs that may otherwise be overlooked and inadvertently lost. Our phylogenetic reconstruction has identified hidden pockets of evolutionary distinctiveness, which provide a valuable platform upon which to re-evaluate investment of conservation resources within the Terpsiphone flycatchers of the Indian Ocean.

Item Type: Article
DOI/Identification number: 10.1016/j.ympev.2013.01.019
Subjects: Q Science > QH Natural history > QH426 Genetics
Q Science > QH Natural history > QH75 Conservation (Biology)
Divisions: Faculties > Social Sciences > School of Anthropology and Conservation > DICE (Durrell Institute of Conservation and Ecology)
Depositing User: Jim Groombridge
Date Deposited: 08 May 2015 14:26 UTC
Last Modified: 29 May 2019 14:31 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/48317 (The current URI for this page, for reference purposes)
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