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Poster (Scientific congresses and symposiums)
Recent and rapid radiation of the lichen genus Sticta in the Western Indian Ocean islands
Simon, Antoine; Magain, Nicolas; Goffinet, Bernard et al.
2016Third Annual Meeting on Plant Ecology and Evolution (AMPEE3)
 

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Keywords :
Sticta; Lobariaceae; Peltigerales; Divergence date; Phylogeny; Biogeography; Madagascar; Reunion; Mauritius
Abstract :
[en] In the framework of a global project on the phylogeny of the lichen genus Sticta (Lobariaceae), extensive sampling was performed on the islands of Reunion and Mauritius as well as in several parts of Madagascar (mainly in two National Parks : Marojejy and Amber Mountain). The aim of this study is to provide the first comprehensive molecular phylogeny of the genus in the Western Indian Ocean islands (and more specifically of a presumably local endemic lineage), and to date its local radiation. DNA sequences were obtained from 69 specimens for four loci and phylogenetic relationships were inferred using maximum likelihood and Bayesian inferences methods. We estimated divergence times using BEAST. Thirty putative species can be recognized, only 5 have a validly published epithet. All these species form a well-supported monophyletic group within the genus Sticta, and display interesting patterns of endemism: a single species is present in all islands, while the others are restricted either to Madagascar, to Reunion and Mauritius, or to Reunion only. The estimated divergence time of the radiation of this clade occurred in the upper Miocene, apparently concurrent with the emergence of Mauritius. The tree topology obtained supports an original diversification of the clade in the Mascarenes archipelago rather than in Madagascar.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Author, co-author :
Simon, Antoine ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie de l'évolution et de la conservation - aCREA-Ulg
Magain, Nicolas  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie de l'évolution et de la conservation - aCREA-Ulg
Goffinet, Bernard;  University of Connecticut - UCONN > Ecology and Evolutionary Biology
Sérusiaux, Emmanuël ;  Université de Liège > Département de Biologie, Ecologie et Evolution > Biologie de l'évolution et de la conservation - aCREA-Ulg
Language :
English
Title :
Recent and rapid radiation of the lichen genus Sticta in the Western Indian Ocean islands
Publication date :
05 February 2016
Number of pages :
A0
Event name :
Third Annual Meeting on Plant Ecology and Evolution (AMPEE3)
Event organizer :
Olivier Leroux (Research Group Pteridology, Ghent University)
AMPEE is an initiative of the Royal Botanical Society of Belgium and the Botanic Garden Meise, who also collectively publish the journal Plant Ecology and Evolution.
Event place :
Gent, Belgium
Event date :
5 février 2016
Name of the research project :
DEB-1354631: Collaborative Research: Starting from scratch with Sticta: Evolution, diversification, and conservation of a megadiverse flagship lichen genus
Funders :
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA ; National Science Foundation - NSF (USA)
Available on ORBi :
since 11 March 2016

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