Multiple extreme climatic events strengthen selection for earlier breeding in a wild passerine.

ABSTRACT: Global climate warming results in an increase in mean temperatures and in the frequency of extreme climatic events (ECEs), which could both strongly impact ecosystems and populations. Most studies assessing the impact of global warming on ecosystems have focused on warming trends while neglecting ECEs. In particular, the effects of multiple ECEs on fitness, and their consequences for selection, are still missing. Here we explored the effects of daily extreme rainfalls, as well as the occurrence of extremely hot and cold days, on clutch size and laying date in a wild blue tit population (Cyanistes caeruleus) monitored over 25 years. During the nestling phase (8-15 days old), the number of fledglings in a brood was negatively correlated with extremely hot days. The presence of extremely hot

SUBMITTER: Marrot P 

PROVIDER: S-EPMC5434099 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature