Climate oscillations and species interactions: large-scale congruence but regional differences in the phylogeographic structures of an alpine plant and its monophagous insect

Details

Serval ID
serval:BIB_96C7576DC12C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Climate oscillations and species interactions: large-scale congruence but regional differences in the phylogeographic structures of an alpine plant and its monophagous insect
Journal
Journal of Biogeography
Author(s)
Borer M., Arrigo N., Buerki S., Naisbit R.E., Alvarez N.
ISSN
0305-0270
Publication state
Published
Issued date
2012
Peer-reviewed
Oui
Volume
39
Number
8
Pages
1487-1498
Language
english
Abstract
Aim. To predict the fate of alpine interactions involving specialized species, using a monophagous beetle and its host-plant as a case study.
Location. The Alps.
Methods. We investigated genetic structuring of the herbivorous beetle Oreina gloriosa and its specific host-plant Peucedanum ostruthium. We used genome fingerprinting (in the insect and the plant) and sequence data (in the insect) to compare the distribution of the main gene pools in the two associated species and to estimate divergence time in the insect, a proxy for the temporal origin of the interaction. We quantified the similarity in spatial genetic structures by performing a Procrustes analysis, a tool from the shape theory. Finally, we simulated recolonization of an empty space analogous to the deglaciated Alps just after ice retreat by two lineages from two species showing unbalanced dependence, to examine how timing of the recolonization process, as well as dispersal capacities of associated species, could explain the observed pattern.
Results. Contrasting with expectations based on their asymmetrical dependence, patterns in the beetle and plant were congruent at a large scale. Exceptions occurred at a regional scale in areas of admixture, matching known suture zones in Alpine plants. Simulations using a lattice-based model suggested these empirical patterns arose during or soon after recolonization, long after the estimated origin of the interaction c. 0.5 million years ago.
Main conclusions. Species-specific interactions are scarce in alpine habitats because glacial cycles have limited opportunities for coevolution. Their fate, however, remains uncertain under climate change. Here we show that whereas most dispersal routes are paralleled at large scale, regional incongruence implies that the destinies of the species might differ under changing climate. This may be a consequence of the host-dependence of the beetle that locally limits the establishment of dispersing insects.
Keywords
AFLP, congruence testing, Europe, Oreina gloriosa, Peucedanum ostruthium, phylogeography, Procrustean analyses, Quaternary, random walk model, spatial genetic structure
Web of science
Create date
07/02/2012 22:56
Last modification date
20/08/2019 14:58
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