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Data from: Adaptive radiation driven by the interplay of eco-evolutionary and landscape dynamics

Domain:

environment and energy

Record type:

model
Creator:
AguClaLam
Publisher:
Dry
Host:avatar
We investigate an individual-based model of adaptive radiation based on the biogeographical changes of the Great African Lakes where cichlid fishes radiated. In our model, the landscape consists of a mosaic of three habitat types which may or may not be separated by geographic barriers. We study the effect of the alternation between allopatry and sympatry called landscape dynamics. We show that landscape dynamics can generate a significantly higher diversity than allopatric or sympatric speciation alone. Diversification is mainly due to the joint action of allopatric, ecological divergence, and of disruptive selection increasing assortative mating and allowing for the coexistence in sympatry of species following reinforcement or character displacement. Landscape dynamics possibly increase diversity at each landscape change. The characteristics of the radiation depend on the speed of landscape dynamics and of the number of geographically isolated regions at steady state. Under fast dynamics of a landscape with many fragments, the model predicts a high diversity, possibly subject to the temporary collapse of all species into a hybrid swarm. When fast landscape dynamics induce the recurrent fusion of several sites, diversity is moderate but very stable over time. Under slow landscape dynamics, diversification proceeds similarly, although at a slower pace. revised_simul_DLCode for simulation and diversity estimation. NOTE: Please use revised_simul_DL.zip and not simul_DL.zip. Version 1 was uploaded by mistake, and this is not the simulation code corresponding to the published paper. Version 2 is the correct simulation code.

Visit

doi.orgdatadryad.org

Tags

character displacement

Licenses

Creative Commons Zero v1.0 Universalhttps://creativecommons.org/publicdomain/zero/1.0/legalcode