Oecologia

, Volume 151, Issue 4, pp 697–703

Patterns of phenological changes in migratory birds

  • Kasper Thorup
  • Anders P. Tøttrup
  • Carsten Rahbek
Global Change and Conservation Ecology

DOI: 10.1007/s00442-006-0608-8

Cite this article as:
Thorup, K., Tøttrup, A.P. & Rahbek, C. Oecologia (2007) 151: 697. doi:10.1007/s00442-006-0608-8

Abstract

The phenology of avian migration appears to be changing in response to climate change. Seemingly contradictory differences in the timing of these annual cycles have been reported in published studies. We show that differences between studies in the choice of songbird species, as well as in the measurements of migration phenology, can explain most of the reported differences. Furthermore, while earlier spring arrival is evident across these studies, trends in timing of departure show large variation between species and according to individual timing of migration (early-arriving vs. late-departing individuals). Much of the variation in departure between species could be explained by each species’ migratory status. We present a detailed analysis of migrants recorded at a Danish migration site, and reveal that although shifts in migration timing can be demonstrated for almost all species, these shifts are either most pronounced in the early arriving/late departing individuals or the changes are similar. Thus most individuals do not seem to change their breeding-area residence time (BART). As BART is likely to reflect ecologically important factors, e.g. number of clutches, we expect that only small effects have been exerted on the breeding ecology of the studied species in the time period investigated.

Keywords

Breeding timeMigrationClimate changeSongbirdsPopulation dynamics

Supplementary material

442_2006_608_MOESM1_ESM.doc (91 kb)
Supplementary material
442_2006_608_MOESM2_ESM.pdf (13 kb)
Supplementary material

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Kasper Thorup
    • 1
    • 2
  • Anders P. Tøttrup
    • 2
  • Carsten Rahbek
    • 2
  1. 1.Zoological MuseumUniversity of CopenhagenCopenhagenDenmark
  2. 2.Center for Macroecology, Institute of BiologyUniversity of CopenhagenCopenhagenDenmark