Fitness consequences of longer breeding seasons of a migratory passerine under changing climatic conditions.

ABSTRACT: Numerous studies have shown that climate change affects the timing of migration and bird laying dates, but the resulting changes in the duration of breeding seasons and their fitness consequences remain largely unknown. We compared breeding parameters of 343 individually marked female Eurasian reed warblers, a multi-brooded migratory passerine, studied in the same area in 1980-1983 and 2005-2012. The latter period was warmer, with mean temperatures during the breeding season higher by 1.5°C on average. As, in recent years, birds arrive earlier from wintering areas and the breeding season of the population is longer, we hypothesized it should result in the increased re-nesting opportunities of individual females. We found that breeding periods of individual females (from building of the fir

SUBMITTER: Halupka L 

PROVIDER: S-EPMC8360183 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature