Data from: Consumer-resource interactions and the evolution of migration

Theoretical studies have demonstrated that selection will favor increased
migration when fitnesses vary both temporally and spatially, but it is far
from clear how pervasive those theoretical conditions are in nature. While
consumer-resource interactions are omnipresent in nature and can generate
spatial and temporal variation, it is unknown even in theory whether these
dynamics favor the evolution of migration. We develop a mathematical model
to address whether and how migration evolves when variability in fitness
is determined at least in part by consumer-resource coevolutionary
interactions. Our analyses show that such interactions can drive the
evolution of migration in the resource, consumer, or both species and thus
supplies a general explanation for the pervasiveness of migration. Over
short time scales, we show the direction of change in migration rate is
determined primarily by the state of local adaptation of the species
involved: rates increase when a species is locally maladapted and decrease
when locally adapted. Our results reveal that long-term evolutionary
trends in migration rates can differ dramatically depending on the
strength or weakness of interspecific interactions and suggest an
explanation for the evolutionary divergence of migration rates among
interacting species.