Download or read book The Winter Ecology of Cape Churchill Caribou Rangifer Tarandus Ssp written by Mitch William Campbell and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Winter Ecology of Cape Churchill Caribou Rangifer Tarandus Ssp written by Mitch Campbell and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aspects of snow conditions, plant community use, and feeding habits were examined for caribou occupying the Cape Churchill Wildlife Management Area. Studies were carried out over each of the 1989-90 and 1990-91 snow seasons. Attempts were made to interrelate feeding habits and plant community use with changing snow conditions based on 7 snow stations set up within four taiga and three tundra plant communities. Fundamental differences between taiga and tundra snow conditions are also discussed. Plant communities were described based on quadrat and point quarter methods, prior to snowfall, within each of four taiga and three tundra plant community snow stations. Snow conditions at snow stations and caribou feeding sites were quantified through the excavation and examination of snow profiles ... Taiga and tundra snow conditions are fundamentally different. This was primarily due to the effects of wind on the more exposed tundra and the relative lack of wind in the taiga ... Cape Churchill caribou displayed a wide use of plant communities that varied both throughout the snow seasons and between them. Snow conditions within taiga plant communities differed both between themselves over both snow seasons, and differed between the two snow seasons. Tundra plant communities also displayed variability over the same periods though not as severe as taiga sites. Cape Churchill caribou did however remain in feeding sites beyond threshold levels if suitable alternate plant communities were not available. These data imply that conventional wildlife management techniques used to determine caribou range tend dramatically to underestimate actual requirements. Through the long term field monitoring of representative plant community snow conditions and winter habitat use by caribou, a more realistic estimate of caribou range can be achieved.
Download or read book The Winter Ecology of Cape Churchill Caribou Rangifer Tarandus Ssp microform written by Mitch William Campbell and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1999 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Winter Ecology of Woodland Caribou Rangifer Tarandus Caribou and Some Aspects of the Winter Ecology of Moose Alces Alces Andersoni and Whitetail Deer Odocoileus Virginianus Dacotensis Mammalia written by R. R. P. Stardom and published by . This book was released on 1977 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three major woodland caribou habitats are: open larch or black spruce bogs (the major source of arboreal lichens), intermediate to mature jack pine rock ridge forests (the major source of ground lichens) and rock ridge-shored lakes (major travel, loafing and feeding areas at the beginning of the spring thaw). During early winter, the caribou feed intensively on arboreal lichens in open bogs under windless, thin snow cover conditions but, if the reverse conditions exist, intensive feeding shifts to ground lichens found on ridge areas. During the remainder of the snow period, major feeding is on intermediate to mature jack pine ridges where the snow cover is softer due to the lack of wind crusts and thinner due to qali formation. Major utilization of lakes occurs only during periods of thick snow cover when the nival conditions on lakes are more conducive to loafing and travel than adjacent forest types. The woodland caribou threshold of sensitivity to nival conditions is approximately 65 cm. The hardness threshold is approximately 80g/cm2 for jack pine ridge areas, 400 g/cm2 for open bog areas and 700 g/cm2 on lakes. The density threshold is approximately 0.20 to 0.36 for jack pine ridge areas, 0.18 to 0.24 for bog areas and 0.25 to O.33 for lakes. These thresholds vary with the thickness of the snow cover in the three habitats and height of hard, dense layers above the substrate. A minimum of 183 woodland caribou inhabited the extensive study area during the study period. This population was comprised of five groups that ranged in size from 8 to 55 individuals. No overlap in their winter ranges was evident. In a winter of thin snow cover, the bands making up the resident groups are smaller and feed more extensively over their winter range. Conversely, in a winter of thick snow cover, there is a greater aggregation of individuals into larger bands which feed intensively in small areas of their winter range. Association between whitetail deer and woodland caribou is almost non-existent. Association between whitetail deer and moose is high only during periods of thin snow cover when the two species inhabit the same habitat type. Association between moose and woodland caribou is less than what would be expected by chance and this lack of association is primarily due to ecological segregation. Moose appear to be restricted little in this portion of their winter range though they are generally observed on high ground or ridge areas during the onset of the winter period. When the bogs and swamps are frozen, they again inhabit a melange of habitat types and during late winter, are frequently found in areas which harbored deer in the early winter months. In the East Lake Winnipeg snow regime, average snow cover thicknesses have little effect on moose activity; any shift in activity normally does not occur until large areas exhibit snow cover thicknesses in excess of 70 cm. Whitetail deer are influenced most by the nival environment and, while inhabiting mixed deciduous-coniferous forests during the major portion of the winter, they are restricted to areas offering thin, soft snow conditions during January and February. Of the three ungulate species in the study area, whitetail deer are first to exhibit a response to the nival conditions and react to snow cover thicknesses in excess of 25 cm by moving from normal summer range to areas with more favorable snow conditions.
Download or read book Winter Ecology of Woodland Caribou written by R. R. P. Stardom and published by . This book was released on 1977 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Winter Range Ecology of Caribou rangifer Tarandus written by Don Russell and published by . This book was released on 1991 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Significance of Snow and Arboreal Lichen in the Winter Ecology of Mountain Caribou Rangifer Tarandus Caribou in the North Thompson Watershed of British Columbia written by Theodore Danial Antifeau and published by . This book was released on 1987 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology of the Caribou Rangifer Tarandus Granti in Alaska written by Ronald Oliver Skoog and published by . This book was released on 1968 with total page 1398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Abstracts International written by and published by . This book was released on 1996 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology of the Caribou Rangifer Tarandus Granti in Alaska written by Ronald Oliver Skoog and published by . This book was released on 1968 with total page 1398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Ecology of the Caribou Rangifer Tarandus Granti in Alaska written by Ronald O. Skoog and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Winter Habitat Use by Woodland Caribou Rangifer Tarandus Caribou in the Owl Lake Region of Manitoba written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seasonal Movements Habitat Utilization and Population Ecology of Woodland Caribou Rangifer Tarandus Caribou Gmelin in the Wallace Aikens Lake Region of Southeastern Manitoba written by William Richard Darby and published by . This book was released on 1979 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the general public has some knowledge of migratory barren-ground caribou (Rangifer tarandus groenlandicus L.), but few people realize that a larger counterpart, the woodland caribou (R. t. caribou Gmelin), exists in southern Canada. At present, the latter's range includes Newfoundland and most undeveloped areas of the boreal coniferous forest. Prior to European settlement, it included parts of the northern United States, but since 1750, the southern limit of distribution has receded steadily. In the past, representatives of the genus Rangifer were divided into many species and subspecies by several classification schemes. Banfield (1961) consolidated all races into one species (Rangifer tarandus) with five extant subspecies in North America: woodland caribou (R. t. caribou Gmelin), Grant's caribou (R. t. granti Allen) of the Yukon Territory and Alaska, barren-ground caribou (R. t. groenlandicus L.) of northern Canada, Peary's caribou (R. t. pearyi Allen) of the Canadian Arctic Archipelago, and domestic reindeer (R. t. tarandus L.) of the Tuktoyaktuk Peninsula, Northwest Territories. However, consolidation of the genus by Banfield (1961) did not obviate the fact that many differences in behaviour still exist among the incorporated races, including those within the R. t. caribou subspecies (cf. Shoesmith 1978). Investigations of woodland caribou in closed forest habitat are exceedingly difficult, and little information exists on their ecology. 0ften, extrapolations cannot be made from the existing literature. Reasons for the shrinking distribution and decline of woodland caribou are controversial. Nonetheless, widespread development of caribou habitat has always been attended by disappearance of the subspecies. Woodland caribou constitute a valuable resource for tourism, recreation, and the economy of native people. If mismanaged, the resource will disappear. Baseline data on woodland caribou in developing areas of Manitoba are needed. Information on the ecology of local populations would be valuable in making management decisions. This study was initiated to obtain data on caribou in the Wallace-Aikens lakes area of southeastern Manitoba. For purposes of convenience, the caribou in this area will be referred to as the Aikens Lake herd. The major objectives were: (l) to gather information on seasonal movements, distribution, and herd behaviour; and (2) to collect data on herd size, reproduction, mortality, and other aspects of population ecology. A minor objective was to examine aspects of habitat utilization.
Download or read book Plasticity in Selection Strategies of Woodland Caribou Rangifer Tarandus Caribou During Winter and Calving written by David D. Gustine and published by . This book was released on 2005 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ecology of Browsing and Grazing written by Iain J. Gordon and published by Springer Science & Business Media. This book was released on 2007-09-14 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume investigates how large herbivores not only influence the structure and distribution of the vegetation, but also affect nutrient flows and the responses of associated fauna. The mechanisms and processes underlying the herbivores' behavior, distribution, movement and direct impact on the vegetation are discussed in detail. It is shown that an understanding of plant/animal interactions can inform the management of large herbivores to integrate production and conservation in terrestrial systems.
Download or read book Global Biodiversity in a Changing Environment written by Osvaldo E. Sala and published by Springer Science & Business Media. This book was released on 2001-08-24 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climatic change, conservation biology
Download or read book Biogeography written by Glen MacDonald and published by John Wiley & Sons. This book was released on 2002-02-28 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Illustrative examples from recent research publications and "classic" studies are prominently featured throughout the book. Research techniques are highlighted in "special interest" boxes. Illustrations and descriptions of research techniques are provided with examples such as fire-scars from trees used to reconstruct disturbance, fossil pollen used to reconstruct vegetation change and plant migration, transect and quadrate sampling. Includes key biogeographical theories that link space and time to the distribution of life. Some of these theories include: 1. Ranges, Reflicts, Refuges, Corridors, Barriers, 2. Centers of Origins, 3. Cladistics, 4. Variance, 5. Island BioGeography, 6. Diversity Theory, 7. Gap Analysis for Conservation.
