Effects of food abundance and early clutch predation on reproductive timing in a high Arctic shorebird exposed to advancements in arthropod abundance

摘要: Climate change may influence the phenology of organisms unequally across trophic levels and thus lead to phenological mismatches between predators prey. In cases where prey availability peaks before reproducing reach maximal demand, any negative fitness consequences would selectively favor resynchronization by earlier starts reproductive activities predators. At a study site in northeast Greenland, over period 17 years, median emergence invertebrate Sanderling Calidris alba advanced with 1.27 days per year. Yet, same did not advance hatching date. Thus, Sanderlings increasingly hatched after their was maximally abundant. Surprisingly, affect chick growth, but interaction annual width height peak food abundance did. Chicks grew especially better years when broad. clutches were most likely be depredated early season, which should delay reproduction. We propose that high clutch predation later timing. Additionally, our data suggest still abundant date emergence, explain why breeding along advances arthropod phenology.