Université de Fribourg

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

Borer, Matthias ; Arrigo, Nils ; Buerki, Sven ; Naisbit, Russell E. ; Alvarez, Nadir

In: Journal of Biogeography, 2012, p. -

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)...

Université de Fribourg

Positive frequency-dependent selection on warning color in alpine leaf beetles

Borer, Matthias ; Noort, Tom Van ; Rahier, Martine ; Naisbit, Russell E.

In: Evolution, 2010, vol. 64, no. 12, p. 3629–3633

Müller's theory of warning color and mimicry, despite forming a textbook example of frequency-dependent selection, has rarely been demonstrated in the wild. This may be largely due to the practical and statistical difficulties of measuring natural selection on mobile prey species. Here we demonstrate that this selection acts in alpine beetle communities by using tethered beetles exposed to...

Université de Fribourg

Discordances between phylogenetic and morphological patterns in alpine leaf beetles attest to an intricate biogeographic history of lineages in postglacial Europe

Triponez, Yann ; Buerki, Sven ; Borer, Matthias ; Naisbit, Russel E. ; Rahier, Martine ; Alvarez, Nadir

In: Molecular Ecology, 2011, vol. 20, no. 11, p. 2442–2463

Pleistocene glacial and interglacial periods have moulded the evolutionary history of European cold-adapted organisms. The role of the different mountain massifs has, however, not been accurately investigated in the case of high-altitude insect species. Here, we focus on three closely related species of non-flying leaf beetles of the genus Oreina (Coleoptera, Chrysomelidae), which are often found...

Université de Fribourg

The phylogeography of an alpine leaf beetle: Divergence within Oreina elongata spans several ice ages

Borer, Matthias ; Alvarez, Nadir ; Buerki, Sven ; Margraf, Nicolas ; Rahier, Martine ; Naisbit, Russell E.

In: Molecular Phylogenetics and Evolution, 2010, vol. 57, no. 2, p. 703-709

The genetic landscape of the European flora and fauna was shaped by the ebb and flow of populations with the shifting ice during Quaternary climate cycles. While this has been well demonstrated for lowland species, less is known about high altitude taxa. Here we analyze the phylogeography of the leaf beetle Oreina elongata from 20 populations across the Alps and Apennines. Three mitochondrial and...