Ecological uncertainty favours the diversification of host use in avian brood parasites.

ABSTRACT: Adaptive responses to ecological uncertainty may affect the dynamics of interspecific interactions and shape the course of evolution within symbioses. Obligate avian brood parasites provide a particularly tractable system for understanding how uncertainty, driven by environmental variability and symbiont phenology, influences the evolution of species interactions. Here, we use phylogenetically-informed analyses and a comprehensive dataset on the behaviour and geographic distribution of obligate avian brood parasites and their hosts to demonstrate that increasing uncertainty in thermoregulation and parental investment of parasitic young are positively associated with host richness and diversity. Our findings are consistent with the theoretical expectation that ecological risks and environme

SUBMITTER: Antonson ND 

PROVIDER: S-EPMC7442637 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature