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Congruence between distribution modelling and phylogeographical analyses reveals Q uaternary survival of a toadflax species ( L inaria elegans ) in oceanic climate areas of a mountain ring range
Author(s) -
FernándezMazuecos Mario,
Vargas Pablo
Publication year - 2013
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/nph.12220
Subject(s) - last glacial maximum , ecology , coalescent theory , phylogeography , glacial period , climate change , range (aeronautics) , population , biology , interglacial , species distribution , phylogenetic tree , habitat , paleontology , biochemistry , materials science , demography , composite material , sociology , gene
Summary The role of Q uaternary climatic shifts in shaping the distribution of L inaria elegans , an Iberian annual plant, was investigated using species distribution modelling and molecular phylogeographical analyses. Three hypotheses are proposed to explain the Q uaternary history of its mountain ring range. The distribution of L . elegans was modelled using the maximum entropy method and projected to the last interglacial and to the last glacial maximum ( LGM ) using two different paleoclimatic models: the Community Climate System Model ( CCSM ) and the Model for Interdisciplinary Research on Climate ( MIROC ). Two nuclear and three plastid DNA regions were sequenced for 24 populations (119 individuals sampled). Bayesian phylogenetic, phylogeographical, dating and coalescent‐based population genetic analyses were conducted. Molecular analyses indicated the existence of northern and southern glacial refugia and supported two routes of post‐glacial recolonization. These results were consistent with the LGM distribution as inferred under the CCSM paleoclimatic model (but not under the MIROC model). Isolation between two major refugia was dated back to the R iss or M indel glaciations, > 100 kyr before present ( bp ). The A tlantic distribution of inferred refugia suggests that the oceanic (buffered)–continental (harsh) gradient may have played a key and previously unrecognized role in determining Q uaternary distribution shifts of M editerranean plants.