Apr 1, 2016

Consistent response of bird populations to climate change on two continents

Philip A. Stephens, Lucy R. Mason, Rhys E. Green, Richard D. Gregory, John R. Sauer, Jamie Alison, Ainars Aunins, Lluís Brotons, Stuart H. M. Butchart, Tommaso Campedelli, Tomasz Chodkiewicz, Przemysław Chylarecki, Olivia Crowe, Jaanus Elts et al
  • States that large-scale analyses have generally focused on the impacts of climate change on the geographic ranges of species and on phenology, the timing of ecological phenomena
  • Uses long-term monitoring of the abundance of breeding birds across Europe and the United States to produce, for both regions, composite population indices for two groups of species: those for which climate suitability has been either improving or declining since 1980
  • Finds the ratio of these composite indices, the climate impact indicator (CII), reflects the divergent fates of species favored or disadvantaged by climate change and that the trend in CII is positive and similar in the two regions
  • Finds on both continents, interspecific and spatial variation in population abundance trends are well predicted by climate suitability trends