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bioRxiv · 10.1101/523720

Eco-Evolutionary Feedbacks between Predator’s Linkage Disequilibrium and Prey Densities Maintain Diversity

Patel, S.·Buerger, R.
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Abstract

Diversity occurs at multiple scales. Within a single population, there is diversity in genotypes and phenotypes. At a larger scale, within ecological communities, there is diversity in species. There have been a number of studies to investigate how diversity at these two scales influence each other through what has been termed eco-evolutionary feedbacks. Here we study a three-species ecological module called apparent competition, in which the predator is evolving in a trait that determines its interaction with two prey species. Unlike previous studies on apparent competition, which employed evolutionary frameworks with greatly simplified genetics, we study a multilocus eco-evolutionary model in which the predators evolving trait is determined by two diallelic loci. We ask how eco-evolutionary feedbacks with these two loci affect the coexistence of the prey species and the maintenance of polymorphisms within the predator species. In doing so, we uncover a novel eco-evolutionary feedback between the prey species and the linkage disequilibrium of the two loci of the predator. Through a stability analysis, we demonstrate how these feedbacks affect polymorphisms at both loci and, among others, may generate stable cycling.

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Patel, S., Buerger, R.. 2019-01-17. Eco-Evolutionary Feedbacks between Predator’s Linkage Disequilibrium and Prey Densities Maintain Diversity. https://doi.org/10.1101/523720

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