Effects of Climate Change on Spring Arrival Times of Birds in Thoreau's Concord from 1851 to 2007

[摘要] Abstract. The effects of climate change have been detected in numerous biological systems. Study of phenology, including the timing of bird migrations, has proven to be an effective tool for understanding the degree to which plants and animals are affected by climate change. In this study, we analyzed records of birds' arrival at Concord, Massachusetts, over 157 years, compiling the longest known record of bird-arrival dates in North America. Using records of bird arrivals by American philosopher and naturalist Henry David Thoreau for 1851–1854 and the well-known ornithologists William Brewster for 1886 and 1900–1919 and Ludlow Griscom for 1930–1931 and 1933–1954, we examined whether birds are shifting their arrival times in response to a warming climate. Concord resident Rosita Corey provided a set of recent observations for the years 1956–1973 and 1988–2007. When we considered all 22 species of migratory songbirds we analyzed together, we found no average change in arrival date over time, though when we...

[学科分类] 动物科学

[关键词] Brewster;climate change;Griscom;Massachusetts;migration;Thoreau