@ARTICLE{TreeBASE2Ref23507, author = {Anahi Espindola and Bryan C Carstens and Nadir Alvarez}, title = {Comparative phylogeography of mutualists and the effect of the host on the genetic structure of its partners}, year = {2014}, keywords = {Approximate Bayesian Computation , Chiastocheta, climatic oscillation, coalescent modelling, coevolution, comparative phylogeography, nursery pollination mutualism, Last Glacial Maximum, spatial genetic structure, Trollius europaeus}, doi = {}, url = {http://}, pmid = {}, journal = {Biological Journal of the Linnean Society}, volume = {}, number = {}, pages = {}, abstract = {Whether or not species participating in specialized and obligate interactions display similar and simultaneous demographic variations at the intra-specific level remains an open question in phylogeography. Here, we use the mutualistic nursery pollination occurring between the European globeflower Trollius europaeus and its specialized pollinators in the genus Chiastocheta as a case study. Explicitly, we ask whether or not the phylogeographies of the pollinating flies are significantly different from the expectation under a scenario of plant-insect congruence. Based on a large-scale sampling, we first use mitochondrial data to infer the phylogeographic histories of each fly species. Then, we define phylogeographic scenarios of congruence with the plant history, and use Maximum Likelihood and Bayesian approaches to test for plant-insect phylogeographic congruence for the three Chiastocheta species. We show that the phylogeographic histories of the three fly species differ. Only C. lophota and C. dentifera display strong spatial genetic structures, which appear to be not statistically different from those expected under scenarios of phylogeographic congruence with the plant. Our results indicate that the fly species responded in independent and different ways to shared evolutionary forces, displaying varying levels of congruence with the plant genetic structure.} }

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