Relaxed selection when you least expect it: why declining bird populations might fail to respond to phenological mismatches
Ongoing climate change threatens to cause mismatches between the phenology of many organisms and their resources. Populations of migratory birds may need to undergo ‘evolutionary rescue’ if resource availability moves to earlier dates in the year, as shifted arrival dates at the breeding grounds may be required for persistence under new environmental sched-ules. Here we show a counterintuitive process that can reduce the strength of selection for early arrival when the resource peaks earlier....[Show more]
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