Download or read book Status of the Whitebark Pine Pinus Albicaulis in Alberta written by Alberta. Dept. of Sustainable Resource Development. Fish and Wildlife Division and published by . This book was released on 2007 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Whitebark Pine Pinus Albicaulis in Alberta written by Brendan Wilson and published by Alberta Conservation Association. This book was released on 2007-01-01 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every five years, the Fish and Wildlife Division of Alberta Sustainable Resource Development reviews the general status of wildlife species in Alberta. These overviews assign individual species "ranks" that reflect the perceived level of risk to populations that occur in the province. This document presents the Division's report concerning the status of the whitebark pine. Information is provided regarding the following aspects of the species: habitat, conservation biology, distribution, population size and trends, limiting factors, and status designations.--Includes text from document.
Download or read book Status of the Whitebark Pine Pinus Albicaulis in Alberta written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silvics of Whitebark Pine Pinus Albicaulis written by Stephen F. Arno and published by . This book was released on 1989 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whitebark pine (Pinus albicaulis) is a long-lived tree inhabiting the upper subalpine forest and timberline zone on high mountains of Western North America. The species' habitat, life history, growth and yield, mortality factors, special uses, and genetics are described.
Download or read book Overstory and Understory Dynamics of Whitebark Pine Pinus Albicaulis Ecosystems of Northwestern British Columbia written by Alana J. Clason and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Symposium on Whitebark Pine Ecosystems written by and published by . This book was released on 1990 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report INT written by and published by . This book was released on 1981 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Regeneration Niche of Whitebark Pine written by Matthew Scott Gelderman and published by . This book was released on 2015 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the regeneration stage of any species is key to determining the processes that lead to population persistence and structure, community development, and succession. In the case of the endangered whitebark pine (Pinus albicaulis), knowledge of regeneration processes will be important for developing approaches for recovery and restoration of the species. I investigated biophysical drivers of whitebark pine seedling presence, abundance, and growth in the northern Alberta Rocky Mountains where mortality from white pine blister rust (caused by the fungus Cronartium ribicola) and mountain pine beetle (Dendroctonus ponderosae) remains low and whitebark pine regeneration is poorly studied. Transects were established in different mesohabitats (community type and elevation) to determine how these factors influence whitebark pine regeneration. Mesohabitat-scale conditions and seedling density along each transect were measured and microsites with and without whitebark pine seedlings were characterized along each transect. The height, age and health of each whitebark pine seedling found in each microsite was recorded and a subset of seedlings was destructively sampled in order to analyze annual growth and release. In forest mesohabitats canopy gaps at microsite scales favored occurrence, growth rate and growth release. However, at the mesohabitat scale seedling abundance was positively related to canopy cover. Whitebark pine seedlings in open habitats below treeline were negatively associated with cover of rock, graminoids and seedlings of other tree species, grew fastest at intermediate values of temperature and dryness, and exhibited release in microsites with little other understory cover. These results suggest that at the northern portion of its range, whitebark pine grows best in conditions that limit competitors but still allow for sufficient growth. This contrasted with the situation in alpine and treeline mesohabitats, where increased growth rates, growth release and seedling presence were associated with warmer microsites that had higher vegetation cover. Seedling density in both open and treeline environments was highest along southwest facing slopes. That release and general success of seedlings was better in canopy gaps supports the use of restoration activities such as thinning overstory trees and planting in open mesohabitats or microsites. As the regeneration niche of whitebark pine differed among mesohabitats and biophysical drivers of success differed among presence, abundance and growth of whitebark pine, I suggest that it is critically important to consider the mesohabitat and all factors of regeneration success when restoring whitebark pine.
Download or read book Parks Canada Whitebark and Limber Pine Workshop Proceedings written by and published by . This book was released on 2003 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Limber Pine Pinus Flexilis in Alberta written by David William Langor and published by . This book was released on 2007 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crown of the Continent Ecosystem Whitebark Pine Restoration Strategy written by and published by . This book was released on 2019 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whitebark pine (Pinus albicaulis; WBP) is dramatically declining in the Crown of the Continent Ecosystem (CCE) due to a combination of mountain pine beetle (MPB, Dendroctonus ponderosae), effects of fire suppression, and the nonnative pathogen Cronartium ribicola, which causes white pine blister rust (WPBR), all of which have the potential to be exacerbated by climate change. Whitebark pine losses within the CCE are the greatest of anywhere in the species’ range with >90% mortality in some locations1. The same stressors that challenge WBP are also impacting limber pine (P. flexilis) within the CCE. In Waterton Lakes National Park (Alberta) WPBR infection levels within limber pine stands range from 76 to 100% with the disease continuing to intensify through the province2. The large, high intensity Kenow wildfire (2017) burned approximately 47% and 70% of whitebark and limber pine habitat, respectively, within Waterton Lakes National Park and an unknown amount of WBP habitat in Akamina-Kishinena Provincial Park of southeast British Columbia. Within Waterton Lakes National Park, this wildfire resulted in the loss of 80% of limber and whitebark seedlings planted for restoration over the past 10 years and 58% of identified plus trees for both species including three limber pine with high levels of tested resistance. With this extent and intensity of burn, it is uncertain if the surviving limber and whitebark seed sources are sufficient to support natural reestablishment. Numerous wildfires in Glacier National Park in recent years and 2018 wildfires that spanned the boundary between Glacier and Waterton Lakes National Parks, highlights the likelihood of future large scale, high intensity wildfires occurring within the Crown.
Download or read book Whitebark Pine Communities written by Diana F. Tomback and published by Island Press. This book was released on 2001 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whitebark pine is a dominant feature of western high-mountain regions, offering an important source of food and high-quality habitat for species ranging from Clark's nutcracker to the grizzly bear. But in the northwestern United States and southwestern Canada, much of the whitebark pine is disappearing. Why is a high-mountain species found in places rarely disturbed by humans in trouble? And what can be done about it.Whitebark Pine Communities addresses those questions, explaining how a combination of altered fire regimes and fungal infestation is leading to a rapid decline of this once abundant -- and ecologically vital -- species. Leading experts in the field explain what is known about whitebark pine communities and their ecological value, examine its precarious situation, and present the state of knowledge concerning restoration alternatives. The book. presents an overview of the ecology and status of whitebark pine communities offers a basic understanding of whitebark pine taxonomy, distribution, and ecology, including environmental tolerances, community disturbance processes, regeneration processes, species interactions, and genetic population structure identifies the threats to whitebark pine communities explains the need for management intervention surveys the extent of impact and losses to dateMore importantly, the book clearly shows that the knowledge and management tools are available to restore whitebark pine communities both locally and on a significant scale regionally, and it provides specific information about what actions can and must be taken.Whitebark Pine Communities offers a detailed portrait of the ecology of whitebark pine communities and the current threats to them. It brings together leading experts to provide in-depth information on research needs, management approaches, and restoration activities, and will be essential reading for ecologists, land managers, and anyone concerned with the health of forest ecosystems in the western United States.
Download or read book Predicting Functional Role and Occurrence of Whitebark Pine Pinus Albicaulis at Alpine Treelines Model Accuracy and Variable Importance written by Lynn M. Resler and published by . This book was released on 2014 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: At some alpine treelines in the Rocky Mountains, whitebark pine (Pinus albicaulis)?a keystone species?plays a central role in tree island development through facilitation. Whitebark pine occurs both as a solitary tree and also as a component of tree islands, although relative importance of these two patterns varies geographically. We examine the utility of four predictive models to understand how the functional role of a keystone species varies spatially with biophysical conditions. We use a novel data set to predict whitebark pine's functional role, characterized by spatial association and relative position within a tree island at three North American Rocky Mountain treelines. For the study areas combined, and at a study area level, we compared prediction accuracy and variable importance among these modeling approaches: general linear models, classification and regression trees, random forests, and support vector machines. Results revealed that the keystone role of whitebark pine varied spatially. For the combined model, growing season temperature and slope curvature were the most important predictive variables for association and relative position, as revealed by overall agreement among the four models. Prediction accuracy and variable importance varied at the study area level, though, indicating that different conclusions could be drawn from each model, if examined independently. We advocate comparing results from different modeling approaches for complex, field-derived data sets because it might enable a better understanding of model and variable selection and appropriateness of input data resolution. Furthermore, comparative modeling enables assessment of the relative predictive and interpretive capacities of each modeling approach.
Download or read book Proceedings written by and published by . This book was released on 1984 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Cultivated Evergreens written by Liberty Hyde Bailey and published by . This book was released on 1923 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Underwater Methods for Study of Salmonids in the Intermountain West written by Russell F. Thurow and published by . This book was released on 1994 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Federal Register written by and published by . This book was released on 2012-11 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
