Medlem siden: 12/08/2009 10:25:25
Interessant artikkel som ser på potensiell sammenheng mellom klimaforandringer og økende antall østlige sjeldenheter de siste årene.
Jiguet, F. and Barbet-Massin, M. (2012) Climate change and rates of vagrancy of Siberian bird species to Europe. Ibis 155:194-198
"To assess whether increasing numbers of Siberian vagrants observed in Europe in recent autumns can be linked to climate change, we predicted changes in the climatic suitability of the breeding ranges of 46 Siberian bird species known to show vagrancy to Europe and compared these predictions with observed changes in recorded rates of autumn vagrancy across eight European countries during the last three decades. There was a positive correlation between predicted increase in breeding range and vagrancy rates. A positive impact of climate change on range and population size could promote vagrancy, while the increasing use of such alternative migration flyways could provide adaptive advantages in a changing environment."