Abstract:
:Geographic isolation substantially contributes to species endemism on oceanic islands when speciation involves the colonisation of a new island. However, less is understood about the drivers of speciation within islands. What is lacking is a general understanding of the geographic scale of gene flow limitation within islands, and thus the spatial scale and drivers of geographical speciation within insular contexts. Using a community of beetle species, we show that when dispersal ability and climate tolerance are restricted, microclimatic variation over distances of only a few kilometres can maintain strong geographic isolation extending back several millions of years. Further to this, we demonstrate congruent diversification with gene flow across species, mediated by Quaternary climate oscillations that have facilitated a dynamic of isolation and secondary contact. The unprecedented scale of parallel species responses to a common environmental driver for evolutionary change has profound consequences for understanding past and future species responses to climate variation.
journal_name
Ecol Lettjournal_title
Ecology lettersauthors
Salces-Castellano A,Patiño J,Alvarez N,Andújar C,Arribas P,Braojos-Ruiz JJ,Del Arco-Aguilar M,García-Olivares V,Karger DN,López H,Manolopoulou I,Oromí P,Pérez-Delgado AJ,Peterman WE,Rijsdijk KF,Emerson BCdoi
10.1111/ele.13433subject
Has Abstractpub_date
2020-02-01 00:00:00pages
305-315issue
2eissn
1461-023Xissn
1461-0248journal_volume
23pub_type
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