Audubon wildlife report
Author : William Chandler
Publisher : Academic Press
Page : 817 pages
File Size : 20,73 MB
Release : 1988
Category :
ISBN : 9780120410019
Author : William Chandler
Publisher : Academic Press
Page : 817 pages
File Size : 20,73 MB
Release : 1988
Category :
ISBN : 9780120410019
Author : Bowker Editorial Staff
Publisher : R. R. Bowker
Page : 1932 pages
File Size : 50,59 MB
Release : 1990
Category : Nature
ISBN : 9780835226691
Author :
Publisher :
Page : 726 pages
File Size : 20,43 MB
Release : 1990
Category : Forests and forestry
ISBN :
Author :
Publisher :
Page : 88 pages
File Size : 48,1 MB
Release : 1998
Category : Forests and forestry
ISBN :
Author : United States. Congress. House. Committee on Small Business
Publisher :
Page : 1434 pages
File Size : 42,66 MB
Release : 1991
Category : Business & Economics
ISBN :
Author : Fritz L. Knopf
Publisher : Springer Science & Business Media
Page : 329 pages
File Size : 44,37 MB
Release : 2013-04-17
Category : Science
ISBN : 1475727038
The frontier images of America embrace endless horizons, majestic herds of native ungulates, and romanticized life-styles of nomadie peoples. The images were mere reflections of vertebrates living in harmony in an ecosystem driven by the unpre dictable local and regional effects of drought, frre, and grazing. Those effects, often referred to as ecological "disturbanees," are rather the driving forces on which species depended to create the spatial and temporal heterogeneity that favored ecological prerequisites for survival. Alandscape viewed by European descendants as monotony interrupted only by extremes in weather and commonly referred to as the "Great American Desert," this country was to be rushed through and cursed, a barrier that hindered access to the deep soils of the Oregon country, the rich minerals of California and Colorado, and the religious freedom sought in Utah. Those who stayed (for lack of resources or stamina) spent a century trying to moderate the ecological dynamics of Great Plains prairies by suppressing fires, planting trees and exotic grasses, poisoning rodents, diverting waters, and homogenizing the dynamies of grazing with endless fences-all creating bound an otherwise boundless vista. aries in Historically, travelers and settlers referred to the area of tallgrasses along the western edge of the deciduous forest and extending midway across Kansas as the "True Prairie. " The grasses thlnned and became shorter to the west, an area known then as the Great Plains.
Author : Doreen Pfost
Publisher : U of Nebraska Press
Page : 193 pages
File Size : 45,48 MB
Release : 2016-02
Category : History
ISBN : 0803285361
Each spring, formations of sandhill cranes crisscross the skies along Nebraska’s Platte River in one of the last great migratory spectacles on the North American continent. From across the globe, tens of thousands of visitors gather to witness a land transformed, “wild with birds.” But the central Platte River system is witness to even more than this wondrous annual event. It is also an abiding source of natural, agricultural, and economic life in three states as an icon of western history and as a place of wonder. In This River Beneath the Sky, Doreen Pfost seamlessly blends memoir and nature writing, tracking the Platte River valley for one calendar year, ushering readers through its diverse and changing landscape and the plants, animals, and humans that call the ecosystem home. From serving as a tour guide for visitors who come to see the sandhill crane migration to monitoring the population count on a bluebird trail, from exploring the human settlements surrounding the Platte River to wading the river with biologists, Pfost immerses herself in the rhythm and life of the area. Along with Pfost’s personal experiences of the river, she explores the river’s history, the land- and water-use choices that were made decades ago and their repercussions that must now be mitigated if cranes—and other species—are to survive and flourish, and the legislative and scientific efforts to preserve the diverse species and their essential habitat.
Author :
Publisher :
Page : 776 pages
File Size : 36,66 MB
Release : 1996
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Author : Robert D. Brown
Publisher : Springer Science & Business Media
Page : 604 pages
File Size : 12,68 MB
Release : 2012-12-06
Category : Nature
ISBN : 1461227828
The first International Conference on the Biology of Deer Production was held at Dunedin, New Zealand in 1983. That meeting provided, for the first time, a forum for those with interests in either wild deer management or farmed deer production to come together. Scientists, wild deer managers, domestic deer farmers, veterinarians, venison and antler product producers, and others were able to discuss common problems and to share their knowledge and experience. The relationships formed at that meeting, and the information amassed in the resulting Proceedings, sparked new endeavors in cervid research, management, and production. A great deal has taken place in the world of deer biology since 1983. Wild deer populations, although ever increasing in many areas of the world, face new hazards of habitat loss, environmental contamination, and overexploitation. Some species are closer to extinction than ever. Game managers often face political as well as biological challenges. Many more deer are now on farms, leading to greater concerns about disease control and increased needs for husbandry information. Researchers have accumulated considerable new in formation, some of it in areas such as biochemical genetics, not discussed in 1983.
Author :
Publisher :
Page : 552 pages
File Size : 10,86 MB
Release : 2006
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ISBN :