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Author : United States. Forest Service. Southwestern Region. Northern Goshawk Scientific Committee
Publisher : Unknown
Page : 208 pages
File Size : 42,5 Mb
Release : 1992
Category : Goshawk
ISBN : MINN:31951P00908217N
Author : Richard Truman Reynolds
Publisher : Unknown
Page : 100 pages
File Size : 46,6 Mb
Release : 1992
Category : Birds
ISBN : MINN:31951D02977860T
Present forest conditions loss of a herbaceous and shrubby understory, reductions in the amount of older forests, and increased areas of dense tree regeneration reflect the extent of human influence on these forests. These changes may also be affecting goshawk populations. Information on goshawk nesting habitat and foraging behavior, and the food and habitats of selected goshawk prey, was therefore synthesized to develop a set of management objectives, desired forest conditions, and management recommendations. Key objectives of the guidelines are to provide (1) nesting, post-fledging, and foraging areas for goshawks, and (2) habitat to support abundant populations of 14 primary goshawk prey. Thinning trees in the understory, creating small openings in the forest, and prescribed fires should help produce and maintain the desired forest conditions. Other habitat elements critical for maintaining both goshawk and prey populations include abundant snags and large downed logs, woody debris, interspersion of different tree sizes across the landscape, and the majority of a goshawk's home range in older-aged forests. These guidelines should also benefit forest health, soil productivity, and the habitats of other old-growth-dependent plants and animals.
Author : Anonim
Publisher : Unknown
Page : 870 pages
File Size : 49,9 Mb
Release : 1995
Category : Electronic
ISBN : NWU:35556032751349
Author : Anonim
Publisher : Unknown
Page : 308 pages
File Size : 41,9 Mb
Release : 2003
Category : Electronic
ISBN : NWU:35556034589804
Author : Anonim
Publisher : Unknown
Page : 64 pages
File Size : 51,6 Mb
Release : 1999
Category : Goshawk
ISBN : UIUC:30112001724720
Author : Russell T. Graham
Publisher : Unknown
Page : 64 pages
File Size : 41,5 Mb
Release : 1999
Category : Goshawk
ISBN : MINN:31951D02977846N
This assessment describes northern goshawk (Accipiter gentilis) habitat in the State of Utah. Because of fire exclusion, insect and disease epidemics, timber harvest, livestock grazing, or a combination of these factors the forests and woodlands of Utah have changed drastically since the early 1900's. Forests are now dominated by mid- and late successional species (Douglas-fir, white fir, and subalpine fir) rather than the early successional species (lodgepole and ponderosa pine). Along with these changes came suspected declines in goshawk populations. Goshawk habitat in Utah was assessed using potential vegetation types, current vegetation types, and expert knowledge. Subalpine fir (17 percent) and quaking aspen (10 percent) potential vegetation types were the most common forest types in the State. Nearly 95 percent of the subalpine fir potential vegetation type was rated as high or medium for nesting habitat, while nearly 90 percent of the quaking aspen potential vegetation type was rated as high or medium for nesting. Similarly, combining nesting and foraging preferences 70 percent of the subalpine fir potential vegetation type is rated as either high value or optimum habitat. In addition, throughout Utah all of the high value habitats are well connected. The present conditions of the forests and woodlands of Utah are prone to insect and disease epidemics in addition to the risk of stand replacing fires. To ensure the goshawk's continued existence in Utah will require the restoration of these degraded habitats and the protection of native processes.
Author : Anonim
Publisher : Unknown
Page : 320 pages
File Size : 55,6 Mb
Release : 2008
Category : Forest management
ISBN : MINN:31951D029812184
"A primary mission of the U.S. Department of Agriculture Forest Service is multiple resource management, and one of the emerging themes is forest restoration. The National Silviculture Workshop, a biennial event co-sponsored by the Forest Service, was held May 7-10, 2007, in Ketchikan, Alaska, with the theme of "Integrated Restoration of Forested Ecosystems to Achieve Multiresource Benefits." This proceedings presents a compilation of state-of-the-art silvicultural research and forestry management papers that demonstrates integrated restoration to yield multiple resource benefits. These papers highlight national perspectives on ecosystem services, forest restoration and climate change, and regional perspectives on forest restoration and silvicultural practices to achieve multiple resource benefits from researchers and forest practitioners working in a broad array of forest types in the United States."
Author : Anonim
Publisher : Unknown
Page : 600 pages
File Size : 48,5 Mb
Release : 1992
Category : Forests and forestry
ISBN : UOM:39015025084081
Author : Anonim
Publisher : Unknown
Page : 742 pages
File Size : 55,9 Mb
Release : 2008
Category : Forests and forestry
ISBN : CORNELL:31924101490971
Author : Anonim
Publisher : Unknown
Page : 112 pages
File Size : 40,9 Mb
Release : 1996
Category : Goshawk
ISBN : MINN:31951D02974886Q
Author : Anonim
Publisher : Unknown
Page : 494 pages
File Size : 40,7 Mb
Release : 2000
Category : Dixie National Forest (Utah)
ISBN : NWU:35556031865868
Author : Anonim
Publisher : Unknown
Page : 240 pages
File Size : 50,6 Mb
Release : 1998
Category : Forests and forestry
ISBN : UOM:39015053993021
Author : Anonim
Publisher : Unknown
Page : 478 pages
File Size : 52,7 Mb
Release : 2007
Category : Electronic
ISBN : NWU:35556036532927
Author : Anonim
Publisher : Unknown
Page : 460 pages
File Size : 44,7 Mb
Release : 2009
Category : Electronic
ISBN : NWU:35556039330857
Author : Anonim
Publisher : Unknown
Page : 520 pages
File Size : 52,6 Mb
Release : 2009
Category : Electronic
ISBN : NWU:35556039352125