On the width of hybrid zones |
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Authors: | Rick Durrett,Iljana Zä hle |
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Affiliation: | 1. Department of Mathematics, Cornell University, 523 Malott Hall, 14853 Ithaca, NY, United States;2. Mathematics Institute, U. of Erlangen-Nurnberg, Bismarkstrasse 1 1/2, D-91054 Erlangen, Germany |
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Abstract: | Hybrid zones occur when two species are found in close proximity and interbreeding occurs, but the species’ characteristics remain distinct. These systems have been treated in the biology literature using partial differential equations models. Here we investigate a stochastic spatial model and prove the existence of a stationary distribution that represents the hybrid zone in equilibrium. We calculate the width of the hybrid zone, which agrees with the PDE formula only in dimensions d≥3. Our results also give insight into properties of hybrid zones in patchy environments. |
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Keywords: | Hybrid zones Reaction diffusion equation Biased voter model Block construction |
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