Filters: Tags: Woodland Herd (X)25 results (205ms)
Modelling seasonal habitats of boreal woodland caribou at the northern limits of their range: a preliminary assessment of the lower Mackenzie River Valley, Northwest Territories, Canada
[Full text available at publisher site.]
Ecology of boreal woodland caribou in the lower Mackenzie Valley, NT: work completed in the Inuvik region, April 2003 to November 2004
To conserve woodland caribou, resource managers and biologists must understand the processes governing movements and distribution of those animals. I employed a scale-explicit approach to understand some of the mechanisms influencing caribou behaviour. I trailed caribou in forested and alpine habitats and recorded attributes of feeding sites and patches. At larger scales, I used GPS collars to record the movements of caribou. At the scale of the feeding site, caribou cratered at locations with lower snow depths and greater amounts of a variety of terrestrial lichen species. Following increases in snow depth, hardness, and density, caribou in the forest fed more frequently at trees with abundant arboreal lichens....
This report presents a historical survey of the caribou population of British Columbia, based largely on written sources such as explorers' accounts, scientific articles, and archival records. Results are presented by ecoprovince for northern, mountain, and boreal caribou. The current geographic distribution of the species is discussed along with historic trends in the change in the caribou populations. Threats to these populations are also described, including habitat loss, predation, hunting, weather & disease, and land use impacts. The appendix contains a report on the Queen Charlotte Islands population of caribou, now extinct.
Diet and Habitat of Mountain Woodland Caribou Inferred from Dung Preserved in 5000-year-old Alpine Ice in the Selwyn Mountains, Northwest Territories, Canada
Identifying indirect habitat loss and avoidance of human infrastructure by northern mountain woodland caribou
Understanding the impact of indirect habitat loss resulting from avoidance of human infrastructure is an important conservation priority. We evaluated resource selection for 10 global positioning system collared northern mountain woodland caribou (Rangifer tarandus caribou) in British Columbia, Canada, with seasonal resource selection functions (RSF) developed at the second-order (landscape) and third-order (within home range) scales. To estimate how much habitat was lost due to avoidance, we estimated the zone of influence (ZOI) around multiple developments and modeled realized and potential habitat. Potential habitat was approximated by removing the ZOI from RSF models. By calculating the spatial difference between...
Implementation Plan for the Action Plan for Boreal Woodland Caribou in the Northwest Territories: 2010-2015
Woodland caribou (Rangifer tarandus caribou (Gmelin)) populations are in decline throughout much of their range. With increasingly rapid industrial, recreational, residential, and agricultural development of caribou habitat, tools are required to make clear, knowledgeable, and explainable management decisions to support effective conservation of caribou and their range. We developed a series of Bayesian belief networks to evaluate conservation policy scenarios applied to caribou seasonal range recovery areas. We demonstrate the utility of the networks to articulate ecological understanding among stakeholders, to clarify and explicitly depict threats to seasonal range. We also show how simulated forecasts of spatially...
Comment arising from a paper by Wittmer et al.: hypothesis testing for top-down and bottom-up effects in woodland caribou population dynamics
Negotiating the complexities of wildlife management increasingly requires new approaches, especially where data may be limited. A robust combination of traditional ecological knowledge (TEK) and western science has the potential to improve management decisions and enhance the validity of ecological inferences. We examined the strengths and weaknesses of predicting woodland caribou (Rangifer tarandus caribou) habitat selection with resource selection functions (RSF) based on western science and TEK-based models within the territory of the Taku River Tlingit First Nation of northern British Columbia. We developed seasonal RSF models with data from 10 global positioning system collared caribou. We generated TEK-based...
* 1Large-scale habitat loss is frequently identified with loss of biodiversity, but examples of the direct effect of habitat alterations on changes in vital rates remain rare. Quantifying and understanding the relationship between habitat composition and changes in vital rates, however, is essential for the development of effective conservation strategies. * 2It has been suggested that the decline of woodland caribou Rangifer tarandus caribou populations in North America is precipitated by timber harvesting that creates landscapes of early seral forests. Such habitat changes have altered the predator?prey system resulting in asymmetric predation, where predators are maintained by alternative prey (i.e. apparent...
Late winter resource selection and the potential for competition between wood bison and woodland caribou in the Yukon
Wood bison (Bison bison athabascae ) were reintroduced into southwestern Yukon as part of a national recovery program in the late 1980s. The Yukon Bison Management Plan identified potential impacts of the reintroduced bison on other ecosystem components as a priority management issue. In particular, local residents expressed concern for the indirect effects of bison on the Aishihik woodland caribou ( Rangifer tarandus caribou ) herd resulting from competition for space and forage during late winter. This project assessed the potential for exploitative competition between bison and caribou by determining resource selection (i.e., use vs. availability) and overlap in resource use across 3 spatial scales: the landscape,...
Ancient DNA Reveals Genetic Continuity in Mountain Woodland Caribou of the Mackenzie and Selwyn Mountains, Northwest Territories, Canada
Use of Fecal DNA to Estimate Population Demographics of the Boreal and Southern Mountain Ecotypes of Woodland Caribou
This study looked at the efficacy of using woodland caribou fecal pellets as a source of DNA to identify sampled animals and estimate population demographics. Fecal pellet samples were collected using systematic surveys of woodland caribou ranges in Jasper National Park, Alberta and the North Interlake region, Manitoba. Collection of pellet samples took place when snow was present to allow for tracking and location of caribou cratering areas and to obtain good quality DNA. DNA was amplified at ten polymorphic loci and one sex-specific primer. To estimate population size ( N ) and population growth rate (λ), mark-recapture models were used. Model assumptions were evaluated and tested by stratifying available samples...
Full text at University of British Columbia site.
Assessing cumulative human impacts on northern woodland caribou with traditional ecological knowledge and resource selection functions
Population dynamics of the endangered mountain ecotype of woodland caribou (Rangifer tarandus caribou) in British Columbia, Canada
at publisher's site. Also available at FWS site.