Book Description
Impact of Gordon Lake winter road, Mackenzie District, on Bathurst herd of Rangifer tarandus.
Author : Anne Gunn (Wildlife manager)
Publisher : Yellowknife : N.W.T. Wildlife Service
Page : 44 pages
File Size : 45,52 MB
Release : 1981
Category : Barren ground caribou
ISBN :
Impact of Gordon Lake winter road, Mackenzie District, on Bathurst herd of Rangifer tarandus.
Author :
Publisher :
Page : 1232 pages
File Size : 45,59 MB
Release : 1986
Category : Canada
ISBN :
Author : Arctic Science and Technology Information System
Publisher :
Page : 560 pages
File Size : 44,17 MB
Release : 1984
Category : Arctic regions
ISBN :
Author :
Publisher :
Page : 246 pages
File Size : 15,61 MB
Release : 1983
Category : Glaciology
ISBN :
Author : Tara A. Barrier
Publisher :
Page : 0 pages
File Size : 34,45 MB
Release : 2011
Category : Barren ground caribou
ISBN :
"Across the circumpolar north, many herds of Rangifer have decreased in abundance. In the Canadian central Arctic, the Bathurst herd of barren-ground caribou (Rangifer tarandus groenlandicus) declined from 472,000 ± 72,900 (± 95% confidence interval) caribou in 1986 to 31,900 ± 10,900 caribou in 2009 ...A reduction in winter forage due to forest fires has been suggested as a factor contributing to the decline. I employed a multi-scale study design to identify the influence of vegetation, fire history, snow cover, and predation risk on the occupancy of winter habitats by Bathurst caribou. Between 2008 and 2009, I collected forest stand and understory data at habitats used by caribou, as well as paired control sites. At a larger spatial scale, I used animal location data recorded from 1996 - 2009 to characterize the spatial and temporal distribution of Bathurst caribou on the winter range. At the scale of the feeding patch, caribou foraged in habitats with a high-percentage ground cover, high biomass of lichen, and few or small trees. Similarly, the consensus among the models of habitat selection was that collared caribou avoided areas of the winter range with a high density of burns and favoured older patches of forest characterized by a high percentage of ground cover of lichen and herbaceous forage and a close proximity to lakes and rivers. However, there was considerable use of habitats adjacent to the burn boundary, and some caribou occupied early-seral habitats significantly more than expected. Although the abundance of fruticose (having branched, shrubby thalli) lichens was relatively high (2464 kg/ha) in areas burned within the last 43 - 264 years, my results suggest that an increased incidence and severity of forest fires due to climatic warming could cause a temporary decrease in the habitat available to the Bathurst caribou herd during winter. In the event that reduced lichen availability becomes a limiting or regulating factor for caribou, fire suppression may be necessary to mitigate other climate- and anthropogenic-related pressures affecting the popualtion and distribution dynamics of Bathurst caribou."--P. ii-iii.
Author : Intergovernmental Panel on Climate Change. Working Group II.
Publisher : Cambridge University Press
Page : 532 pages
File Size : 42,5 MB
Release : 1998
Category : Science
ISBN : 9780521634557
Cambridge, UK : Cambridge University Press, 1998.
Author : Robert David Miller
Publisher :
Page : 142 pages
File Size : 36,7 MB
Release : 1959
Category : Anchorage (Alaska)
ISBN :
Author : Francis Harper
Publisher : Alpha Edition
Page : 176 pages
File Size : 27,6 MB
Release : 2021-05-07
Category : History
ISBN : 9789354592102
The Barren Ground Caribou Of Keewatin, has been considered by academicians and scholars of great significance and value to literature. This forms a part of the knowledge base for future generations. So that the book is never forgotten we have represented this book in a print format as the same form as it was originally first published. Hence any marks or annotations seen are left intentionally to preserve its true nature.
Author : Leonard F. Ruggiero
Publisher :
Page : 198 pages
File Size : 44,17 MB
Release : 1994
Category : American marten
ISBN :
This cooperative effort by USDA Forest Service Research and the National Forest System assesses the state of knowledge related to the conservation status of four forest carnivores in the western United States: American marten, fisher, lynx, and wolverine. The conservation assessment reviews the biology and ecology of these species. It also discusses management considerations stemming from what is known and identifies information needed. Overall, we found huge knowledge gaps that make it difficult to evaluate the species' conservation status.
Author : U.S. Fish and Wildlife Service
Publisher :
Page : 204 pages
File Size : 38,38 MB
Release : 1986
Category : Arctic National Wildlife Refuge (Alaska)
ISBN :