Adaptive diversification in coevolutionary systems
Format Extent499752 bytes
MetadataShow full item record
Coevolution can trigger frequency-dependent selection by reciprocal effects on the fitness of involved species. Through directional and disruptive selection, coevolution can lead to rich evolutionary possibilities. It can be classified by major types of biotic interactions (mutualism and antagonism) or by the number of species involved (specific, diffuse and escape-and-radiate coevolution). Using two mainstream methods for studying the evolution of quantitative traits [adaptive dynamics (AD) based on canonical equations and evolutionary distribution (ED) based on trait diffusion], we examine three coevolutionary systems, including those driven by mutualistic and antagonistic interactions, as well as food webs. Results highlight the importance of trait-mediated competition, assortative cross-trophic interactions and consumption niche width (dietary width) on adaptive diversification in these coevolutionary systems. Interactions between two species can lead to diffuse and escape-and-radiate coevolution, making coevolutionary networks an ideal model for studying complex adaptive systems.
- RESEARCH: Hui C