Differential changes in life cycle-event phenology provide a window into regional population declines.

ABSTRACT: Climate change affects the phenology of annual life cycle events of organisms, such as reproduction and migration. Shifts in the timing of these events could have important population implications directly, or provide information about the mechanisms driving population trajectories, especially if they differ between life cycle event. We examine if such shifts occur in a declining migratory passerine bird (willow warbler, Phylloscopus trochilus), which exhibits latitudinally diverging population trajectories. We find evidence of phenological shifts in breeding initiation, breeding progression and moult that differ across geographic and spring temperature gradients. Moult initiation following warmer springs advances faster in the south than in the north, resulting in proportionally sh

SUBMITTER: Hanmer HJ 

PROVIDER: S-EPMC9428546 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature