The range margins of northern birds shift polewards

The changes in range margins of birds breeding in Finland was analysed from published atlas data for a 12-year period (1974-1979 to 1986-1989). The change in range margin was statistically corrected for changes in species' distribution using linear regression. For species predominantly occurring in southern Finland (n = 116), the expected range margin shift, if their distribution would not have changed, was 18.8 km northwards. Northerly species (n = 34) showed no such significant range margin shift. A similar result was found earlier for UK birds. Recent range margin shifts in birds therefore seem to be a general phenomenon, which may be related to climate change.

[1]  David L. Thomson,et al.  UK birds are laying eggs earlier , 1997, Nature.

[2]  David B. Roy,et al.  Phenology of British butterflies and climate change , 2000 .

[3]  C. Parmesan,et al.  Poleward shifts in geographical ranges of butterfly species associated with regional warming , 1999, Nature.

[4]  C. Both,et al.  Adjustment to climate change is constrained by arrival date in a long-distance migrant bird , 2001, Nature.

[5]  J. Palutikof,et al.  Climate change 2007 : impacts, adaptation and vulnerability , 2001 .

[6]  L. Conradt,et al.  Ecological and evolutionary processes at expanding range margins , 2001 .

[7]  O. Hüppop,et al.  North Atlantic Oscillation and timing of spring migration in birds , 2003, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[8]  A. Fitter,et al.  Rapid Changes in Flowering Time in British Plants , 2002, Science.

[9]  Camille Parmesan,et al.  Climate and species' range , 1996, Nature.

[10]  C. Thomas,et al.  Birds extend their ranges northwards , 1999, Nature.

[11]  Marcel E. Visser,et al.  Warmer springs lead to mistimed reproduction in great tits (Parus major) , 1998, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[12]  T. Beebee,et al.  Amphibian breeding and climate , 1995, Nature.

[13]  A. Palmer,et al.  QUASIREPLICATION AND THE CONTRACT OF ERROR: Lessons from Sex Ratios, Heritabilities and Fluctuating Asymmetry , 2000 .

[14]  G. Yohe,et al.  A globally coherent fingerprint of climate change impacts across natural systems , 2003, Nature.