Download Boreal birds of North America : a hemispheric view of their by Jeffrey V. Wells PDF

By Jeffrey V. Wells

Reaching from inside Alaska throughout Canada to Labrador and Newfoundland, North America’s boreal woodland is the biggest desolate tract sector left on the earth. it truly is severe habitat for billions of birds; greater than three hundred species usually breed there. After the breeding season, many boreal birds migrate to seasonal habitats around the usa, Mexico, the Caribbean, and crucial and South the United States. This quantity brings jointly new study on boreal fowl biology and conservation. It highlights the significance of the quarter to the worldwide avifauna and to the connectivity among the boreal woodland and ecoregions through the Americas. The contributions exhibit a special set of views at the migration, wintering ecology, and conservation of chicken groups which are tied to the boreal woodland in ways in which won't were formerly considered.

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Extra resources for Boreal birds of North America : a hemispheric view of their conservation links and significance

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The second working hypothesis assumes that availability of upland nesting habitat is not limiting, but anthropogenic changes to uplands may reduce upland quality through increased habitat fragmentation. We hypothesize that (a) creation of travel corridors from roads, seismic lines, and other forest openings and (b) changes in vegetation structure–associated forest cover removal may result in increased predation rates due to immigration of new predator species, improved hunting success of native boreal predators, or growth of predator populations due to more abundant alternate prey.

HOW MIGHT WATERFOWL POPULATIONS CHANGE IN RESPONSE TO ANTHROPOGENIC ACTIVITY? Human activity is changing WBF waterfowl habitat directly through a variety of industrial and recreational activities and indirectly through climate change. However, the impact of these disturbances on waterfowl populations at various spatial scales is unclear. Natural disturbances such as forest fires, insect outbreaks, wind, and ice storms are an intrinsic part of boreal systems that contribute to and help maintain their heterogeneity (Niemi et al.

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