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Wiley InterScience | ||||||||||||||||||||||||||||||
  Conservation BiologyVolume 21 Issue 2, Pages 534 - 539 Published Online: 30 Nov 2006 ©2010, Society for Conservation Biology Published on behalf of the Society for Conservation Biology
Abstract | References | Full Text: HTML, PDF (Size: 101K) | Related Articles | Citation Tracking  Breeding Distributions of North American Bird Species Moving North as a Result of Climate Change Copyright 2007 Society for Conservation Biology KEYWORDS avian distributions • breeding distributions • climate change • global warming • North American birds • range shifts KEYWORDS aves de Norteamérica • calentamiento global • cambio climático • cambios de distribución • distribución de aves • distribución reproductiva ABSTRACTAbstract: Geographic changes in species distributions toward traditionally cooler climes is one hypothesized indicator of recent global climate change. We examined distribution data on 56 bird species. If global warming is affecting species distributions across the temperate northern hemisphere, these data should show the same northward range expansions of birds that have been reported for Great Britain. Because a northward shift of distributions might be due to multidirectional range expansions for multiple species, we also examined the possibility that birds with northern distributions may be expanding their ranges southward. There was no southward expansion of birds with a northern distribution, indicating that there is no evidence of overall range expansion of insectivorous and granivorous birds in North America. As predicted, the northern limit of birds with a southern distribution showed a significant shift northward (2.35 km/year). This northward shift is similar to that observed in previous work conducted in Great Britain: the widespread nature of this shift in species distributions over two distinct geographical regions and its coincidence with a period of global warming suggests a connection with global climate change. ABSTRACTResumen: Los cambios en la distribución de las especies hacia climas tradicionalmente más frescos es un indicador hipotético del cambio climático global reciente. Examinamos los datos de distribución de 56 especies de aves. Si el calentamiento global está afectando la distribución de especies en el Hemisferio Norte templado, estos datos deberían mostrar la misma expansión en la distribución hacia el norte de aves que se han reportado para Gran Bretaña. Debido a que un cambio hacia el norte en las distribuciones puede deberse a expansiones multidireccionales en la distribución de múltiples especies, también examinamos la posibilidad de que aves con distribuciones norteñas estén expandiendo sus distribuciones hacia el sur. No hubo expansión hacia el sur de aves con una distribución norteña, lo que indica que no hay evidencia de una expansión de distribución general de aves insectívoras y granívoras en Norte América. Como se predijo, el límite norteño de aves con distribución sureña mostró un cambio significativo hacia el norte (2.35 km/año). Esta expansión hacia el norte es similar a la observada en trabajos previos realizados en Gran Bretaña: el carácter generalizado de este cambio en las distribuciones de especies en dos regiones geográficas distintas y su coincidencia con un período de calentamiento global sugiere una conexión con el cambio climático global. Paper submitted January 14, 2006; revised manuscript accepted July 13, 2006. | 
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Free Article from Conservation Biology |  |
The article One Hundred Questions of Importance to the Conservation of Global Biological Diversity is now available FREE online. | |
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Conservation Letters |
Conservation Letters is a new, online-only scientific journal publishing empirical and theoretical research with significant implications for the conservation of biological diversity. |
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Conservation |
Conservation is a sophisticated, readable, and utterly practical magazine for people who are serious about conservation. |
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 | New Perspectives on Psychology and Human–Animal Interactions |
This issue of Journal of Social Issues focuses on human attitudes toward the use of other species, the effects of relationships with companion animals on human health and well-being, and the ethical and policy implications of our interactions with other species. | |
