![]() ![]() ![]() The difference between the laying date producing highest reproductive success and the median laying date of the population increased, which suggests an increase in the selection pressure for that trait. Over 25 years, reproductive success of early breeders increased by 42%, producing a steeper seasonal decline in reproductive success. We predicted that optimal laying date yielding highest reproductive success occurred earlier over time and that the seasonal decline in reproductive success increased. As the climate warms and plant phenology advances, the mismatch between the timing of gosling hatch and peak nutritive quality of plants will increase. We studied seasonal changes in reproductive success of the greater snow goose ( Anser caerulescens atlantica), a long-distance migrant. Many avian migrants have not adjusted breeding phenology to climate warming resulting in negative consequences for their offspring. ![]()
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