TY - JOUR
T1 - Ecological uncertainty favours the diversification of host use in avian brood parasites
AU - Antonson, Nicholas D.
AU - Rubenstein, Dustin R.
AU - Hauber, Mark E.
AU - Botero, Carlos A.
N1 - Funding Information:
For partial funding, we thank the GAANN fellowship (to N.D.A.), the Harley Jones Van Cleave Professorship (to M.E.H.), NSF IOS-1953226 (to M.E.H.), National Geographic Society #NGS-60453R-19 (to M.E.H.), and the NSF IOS-1656098 (to D.R.R.). We would also like to thank P. Lowther for sharing brood parasite host lists, and C. Sheard for sharing published comparative data with us, Birdlife International for providing us with access to their database, and C. Goethe for assistance with data collation.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - 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 environmental unpredictability should favour the evolution of bet-hedging. Additionally, these highly consistent patterns highlight the important role that ecological uncertainty is likely to play in shaping the evolution of specialisation and generalism in complex interspecific relationships.
AB - 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 environmental unpredictability should favour the evolution of bet-hedging. Additionally, these highly consistent patterns highlight the important role that ecological uncertainty is likely to play in shaping the evolution of specialisation and generalism in complex interspecific relationships.
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U2 - 10.1038/s41467-020-18038-y
DO - 10.1038/s41467-020-18038-y
M3 - Article
C2 - 32826898
SN - 2041-1723
VL - 11
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 4185
ER -