Present address: UMR 7599, UPMC, 4 place Jussieu, Case courrier 188, F-75252 Paris Cedex 05, France.
Ecological speciation in dynamic landscapes
Article first published online: 29 SEP 2011
© 2011 The Authors. Journal of Evolutionary Biology © 2011 European Society For Evolutionary Biology
Journal of Evolutionary Biology
Volume 24, Issue 12, pages 2663–2677, December 2011
How to Cite
AGUILÉE, R., LAMBERT, A. and CLAESSEN, D. (2011), Ecological speciation in dynamic landscapes. Journal of Evolutionary Biology, 24: 2663–2677. doi: 10.1111/j.1420-9101.2011.02392.x
- Issue published online: 14 NOV 2011
- Article first published online: 29 SEP 2011
- Received 13 January 2011; revised 19 August 2011; accepted 19 August 2011
- dynamic metapopulation;
- ecological speciation;
- landscape dynamics;
- secondary contact;
Although verbal theories of speciation consider landscape changes, ecological speciation is usually modelled in a fixed geographical arrangement. Yet landscape changes occur, at different spatio-temporal scales, due to geological, climatic or ecological processes, and these changes result in repeated divisions and reconnections of populations. We examine the effect of such landscape dynamics on speciation. We use a stochastic, sexual population model with polygenic inheritance, embedded in a landscape dynamics model (allopatry–sympatry oscillations). We show that, under stabilizing selection, allopatry easily generates diversity, but species coexistence is evolutionarily unsustainable. Allopatry produces refuges whose persistence depends on the characteristic time scales of the landscape dynamics. Under disruptive selection, assuming that sympatric speciation is impossible due to Mendelian inheritance, allopatry is necessary for ecological differentiation. The completion of reproductive isolation, by reinforcement, then requires several sympatric phases. These results demonstrate that the succession of past, current and future geographical arrangements considerably influence the speciation process.