Abstract
This chapter explores the evolutionary dynamics that arise when different types of species mix together in a community either by invasion or by perturbation, as well as community mixing caused by climate change. In particular, it considers the features that promote or retard ecological differentiation of species. The chapter first describes a general model of evolutionary and ecological dynamics in a community before discussing adaptive differentiation at multiple trophic levels. It then examines differentiation of species with identical underlying parameters vs. different underlying parameters, along with intraguild predation and how ecological opportunity evolves within biological communities. It also investigates when neutral species will initially differentiate from one another to convert them into a set of coexisting species, and when differentiated species will initially converge to become ecologically more similar. The chapter shows that, when differentiation occurs, the type of traits underlying species interactions determine the ecological structure of the resulting community.
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