RANGE CONTRACTION IN DECLINING NORTH AMERICAN BIRD POPULATIONS

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Conservation Biogeography: assessment and prospect (2005, background): “We are unsure how these insights into the dynamics of range change should be fed into conservation planning (Channell & Lomolino, 2000; Araújo et al., 2002b; Ceballos & Ehrlich, 2002; Rodríguez, 2002), but it is clearly an area worthy of more research efforts by conservation biogeographers.”
Conservation of Grassland Birds in North America: Understanding Ecological Processes in Different Regions: "Report of the AOU Committee on Conservation" (2007, background): “According to Rodriguez (2002), the mechanisms driving declines may be complex, but the conservation eff ort can be simple: concentrate eff orts where birds are most abundant and work from there.”
Projected Impacts of Climate and Land-Use Change on the Global Diversity of Birds (2007, unknown): “Nonuniform distribution of abundances within species ranges mean that range contraction does not straightforwardly translate into population loss [46].”
Range Contractions of North American Carnivores and Ungulates (2004, methodology): “Although it is well known that humans have altered their environment, until recently few quantitative studies have assessed the degree of human influence, especially on a continental or global scale (Hannah et al. 1994, Dobson et al. 2000, Sanderson et al. 2002).”