DOI: 10.1101/496125Dec 13, 2018Paper

An integrated model of population genetics and community ecology

BioRxiv : the Preprint Server for Biology
Isaac OvercastMichael J Hickerson

Abstract

Aim: Quantifying abundance distributions is critical for understanding both how communities assemble, and how community structure varies through time and space, yet estimating abundances requires considerable investment in field work. Community-level population genetic data potentially offer a powerful way to indirectly infer richness, abundance, and the history of accumulation of biodiversity within a community. Here we introduce a joint model linking neutral community assembly and comparative phylogeography to generate both community-level richness, abundance and genetic variation under a neutral model, capturing both equilibrium and non-equilibrium dynamics. Location: Global. Methods: Our model combines a forward-time individual-based community assembly process with a rescaled backward-time neutral coalescent model of multi-taxa population genetics. We explore general dynamics of genetic and abundance-based summary statistics and use approximate Bayesian computation (ABC) to estimate parameters underlying the model of island community assembly. Finally, we demonstrate two applications of the model using community-scale mtDNA sequence data and densely sampled abundances of an arachnid community on La Reunion. First, we use ge...Continue Reading

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