Download or read book Relations of Structure in Aspen Forests to Bird Populations written by Douglas Flack and published by . This book was released on 1967 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bird Populations of Aspen Forests in Western North America written by J. A. Douglas Flack and published by American Ornithologists Union. This book was released on 1976 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Relationships Between Stand Age Stand Structure and Biodiversity in Aspen Mixedwood Forests in Alberta written by Alberta Environmental Centre and published by . This book was released on 1995 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to concerns that intensive logging of Alberta's boreal mixedwood forests may result in a change in forest structure and biota, this report describes forest structure and composition of plant and animal communities in young, mature, and old aspen mixedwood stands of fire origin in Alberta. The information in this report serves as a reference against which structure and biota in harvested forests can be compared. The report begins with a general overview of the flora and fauna of the aspen mixedwood forest, and an examination of the rationale and possible consequences of commercial aspen forestry. Subsequent chapters explore relationships between stand age and microclimate, forest structure and floristics, down woody material, understory vegetation, nonvascular species, birds, and mammals. Chapters addressing featured species cover ungulates, bats, and the flying squirrel. The final chapters discuss relationships between the vertebrate community and forest structure, and provide recommendations for aspen mixedwood forest management in Alberta.

Download or read book Density and Diversity Response of Summer Bird Populations To the Structure of Aspen and Spruce Fir Communities On the Wasatch Plateau Utah written by Janet Lee Young and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Sixteen stands representing a range of structural variation in aspen, mixed aspen-conifer, and spruce-fir communities of the Wasatch Plateau, Utah, were censused by the sample count method. The stands were classified as eleven community types based on the understory dominants or indicator species and the cover types. Fifty bird species were recorded during the two seasons; thirty-two occurred in aspen cover, forty-four in mixed aspen-conifer cover, and twenty-two in spruce-fir. Comparisons of the composition and density of bird populations were made between uniform stands of a single life form and more structurally complex stands of either single or mixed life forms. Limiting factors in the structural characteristics of the stands were identified for birds restricted to particular stands. Low avian similarities between some aspen stands were attributed to the differences in structure between the stands. Bird species which favored the deciduous life form tended to decrease in abundance in the mixed stands as the canopy coverage of conifers increased, and they were absent in the spruce-fir stand. Coniferous forest bird species were more abundant in mixed stands with high coniferous coverage than in the aspen-dominated stands. Low individual bird numbers were found in the conifer stand of uniform small trees. Several vegetational characteristics of the stands were evaluated to determine if any was an index of forest heterogeneity predictive of bird species diversity. The habitat features of ecological relevance to most of the bird species were the size, spacing, and life form of the trees. The diversity of the distribution of diameter measurements at breast height for the tree species was predictive of bird species diversity. High diversity in the distribution of tree measurements at breast height was correlated with variation in tree height, tree canopy diameter, and the spacing of the life forms. It was therefore an index of three dimensional environmental patchiness, easily visualized by the variation in life forms and the number of stories within the stand.

Download or read book Summer Birds and Mammals of Aspen conifer Forests in West central Colorado written by Virgil E. Scott and published by . This book was released on 1988 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shrub Nesting of the Red eyed Vireo in Relation to Structure of Aspen Forests written by William J. Mattson and published by . This book was released on 1979 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the Symposium on the Ecology and Management of Dead Wood in Western Forests written by and published by . This book was released on 2002 with total page 966 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Breeding Bird Communities in Aspen Forests of the Sub boreal Spruce dk Subzone in the Prince Rupert Forest Region written by Rosamund A. Pojar and published by Research Branch, Ministry of Forests. This book was released on 1995 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports a two-year study initiated to examine the diversity of bird communities in different seral stages of the aspen ecosystem at the western end of the dry cool subzone of the sub-boreal spruce zone of the Prince Rupert Forest Region, British Columbia. Breeding birds were chosen for the study since they tend to stay within a relatively confined area once in their territories and are hence easier to count. The study also had the objective of identifying management indicator species that could represent the diversity of most birds likely to be affected by aspen management. Birds were counted by a modified point count method for clearcuts, sapling aspen stands, mature aspen stands, old aspen stands with century-old trees, and mixed aspen-conifer stands. Data were analyzed using a detrended correspondence analysis ordination procedure, and habitat relationships of the 16 most abundant species were analyzed by multiple regression.

Download or read book Research Paper RM written by and published by . This book was released on 1986 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Conservation Biology Principles for Forested Landscapes written by Joan Voller and published by UBC Press. This book was released on 2011-11-01 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended to provide information to those who wish to interact with the landbase in an ecologically sustainable manner. Practitioners charged with the administration of land-based programs in industry and government will find the information presented useful. It should also be a resource for many community groups involved in land-use decision-making. Humans continue to use forests and make decisions about land use without perfect information. Conservation Biology Principles for Forested Landscapes is intended to enable the improvement of planning and decison-making processes by providing ecological information on issues of forest use. Current approaches are not working. Where information exists on new, ecologically sustainable approaches, practitioners should switch. Where the information on a better approach is not yet available, practitioners should replace the current, inappropriate approach with a variety of flexible ones that offer the opportunity to change with new knowledge.

Download or read book General Technical Report RMRS written by and published by . This book was released on 1998 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shrub Nesting of the Red eyed Vireo in Relation to Structure of Aspen Forests written by William J. Mattson and published by . This book was released on 1979 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Climate Change and Rocky Mountain Ecosystems written by Jessica Halofsky and published by Springer. This book was released on 2017-07-19 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the result of a team of approximately 100 scientists and resource managers who worked together for two years to understand the effects of climatic variability and change on water resources, fisheries, forest vegetation, non-forest vegetation, wildlife, recreation, cultural resources and ecosystem services. Adaptation options, both strategic and tactical, were developed for each resource area. This information is now being applied in the northern rocky Mountains to ensure long-term sustainability in resource conditions. The volume chapters provide a technical assessment of the effects of climatic variability and change on natural and cultural resources, based on best available science, including new analyses obtained through modeling and synthesis of existing data. Each chapter also contains a summary of adaptation strategies (general) and tactics (on-the-ground actions) that have been developed by science-management teams.

Download or read book Management of Subalpine Forests written by and published by . This book was released on 1987 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Technical Report RM written by and published by . This book was released on 1984 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Some harvest options and their consequences for the aspen birch and associated conifer forest types of the Lake States written by North Central Forest Experiment Station (Saint Paul, Minn.). and published by . This book was released on 1978 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monitoring Bird Populations by Point Counts written by C. John Ralph and published by DIANE Publishing. This book was released on 1998-05 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Point counts of birds are the most widely used quantitative method and involve an observer recording birds from a single point for a standardized time period. In response to the need for standardization of methods to monitor bird populations by census, researchers met to present data from various investigations working under a wide variety of conditions, and to examine various aspects of point count methodology. Statistical aspects of sampling and analysis were discussed and applied to the objectives of point counts. The final chapter presents these standards and their applications to point count methodology.