Download or read book Lodgepole Pine Response to Aspen Removal in Variable Radii in the SBSdw2 Variant Near Williams Lake B C written by Teresa A. Newsome and published by British Columbia, Forest Science Program. This book was released on 2004 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixed forests of lodgepole pine (Pinus contorta var. latifolia Engelm.) and trembling aspen (Populus tremuloides Michx.) are common throughout interior British Columbia, particularly in north and central areas of the province. In the Cariboo-Chilcotin area of the Southern Interior Forest Region, aspen commonly regenerates along with planted and natural lodgepole pine in the Sub-Boreal Spruce (SBS), Interior Douglas-fir (IDF), Sub-Boreal Pine-Spruce (SBPS), and Interior Cedar-Hemlock (ICH) zones. Historically, aspen has been regarded as a "weed" that competes with conifers, but silviculturists now recognize that there are many benefits to maintaining a broadleaf component within stands. A study was established in 1994 in the SBSdw2 variant of the Cariboo-Chilcotin region of the Southern Interior Forest Region to investigate the effects of removing aspen in 50 or 100 cm radii around crop lodgepole pine versus broadcast removal or no treatment. The primary objective of the study was to assess whether the free-growing criterion (current in 1994), which specified that no overtopping vegetation could be present within a 1 m radius around crop trees, was appropriate in pine-aspen stands, or whether a 50 cm radius zone would be adequate.
Download or read book Effects of Variable Aspen Retention on Stand Development Aspen Sucker Production and Growth of Lodgepole Pine in the SBSdw1 Variant of South central British Columbia written by Teresa A. Newsome and published by . This book was released on 2006 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixtures of trembling aspen (Populus tremuloides Michx.) and naturally regenerated or planted lodgepole pine (Pinus contorta var. latifolia Engelm. ex S. Wats.) occur throughout interior British Columbia. To develop effective management strategies for mixed stands where softwood timber production is the primary objective, silviculturists need information about levels of broadleaves that can be retained without seriously reducing conifer performance. They also require practical guidance on using this information to develop cost-effective treatment prescriptions. To address this topic in the Cariboo-Chilcotin, a pine-aspen competition project that includes studies in a variety of ecosystems is currently under way. In 1999, an operational trial to study the effects of variable aspen retention on stand-level lodgepole pine performance and aspen sucker production was established near McKinley Lake in the SBSdw1 variant of the Central Cariboo Forest District. The study was a co-operative undertaking by the B.C. Ministry of Forests and Weldwood of Canada, Ltd. In 2002, the study was adopted by the Silvicultural Systems Research Group of the Southern Interior Forest Region as part of the pine-aspen competition project, and objectives and methods were subsequently adapted to include the collection of long-term growth and yield and stand development data. This report summarizes fourth-year pine and aspen responses to aspen retention treatments, and provides baseline stand development information.
Download or read book Early Effects of Manipulating Aspen Density and Special Arrangement on Lodgepole Pine Performance Aspen Sucker Production and Stand Development in an 11 year Old Stand in the SBPSxc Subzone of South central British Columbia written by Teresa A. Newsome and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixtures of trembling aspen (Populus tremuloides Michx.) and lodgepole pine (Pinus contorta var. latifolia Engelm.) regenerate naturally throughout the Sub-Boreal Pine-Spruce (SBPS), Interior Douglas-fir (IDF), Sub-Boreal Spruce (SBS), and Interior Cedar-Hemlock (ICH) zones in the Cariboo-Chilcotin area of the Southern Interior Forest Region. Due to the rapid height growth and high initial sucker densities of young aspen, these stands generally require some management at the juvenile stage to meet conifer growth objectives. Strategies designed to lessen competition from young aspen have become more complex over the past decade. In light of current understanding of the importance of broadleaf tree species to overall ecosystem health, successful management of young pine-aspen stands now requires practitioners to find a balance between removing aspen to meet lodgepole pine growth objectives and retaining as much aspen as possible to preserve the ecosystem benefits conferred by broadleaf species, reduce suckering, and reduce silviculture treatment costs. The Clusko aspen removal study, established in 2001 in an 11-year-old lodgepole pine-trembling aspen stand in the SBPSxc subzone, investigates the effects of five levels of aspen removal on target pine, neighbourhood competitive interactions, and stand development. Treatments include: (1) an untreated control; (2) complete aspen removal; broadcast retention of (3) 1000 and (4) 2500 aspen stems ha-1; and (5) a spatial treatment that removed aspen within a 1-m radius around target pine. This report presents second-year results from the Clusko River (Clusko) study.
Download or read book Early Effects of Manipulating Aspen Density on Lodgepole Pine Performance Aspen Sucker Production and Stand Development in the IDFxm Subzone Near Williams Lake B C written by Teresa A. Newsome and published by . This book was released on 2004 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trembling aspen (Populus tremuloides Michx.) is a common component of forests throughout interior British Columbia, particularly in north and central parts of the province. In the Cariboo-Chilcotin area of the Southern Interior Forest Region, aspen commonly regenerates along with planted and natural lodgepole pine (Pinus contorta var. latifolia Engelm.) in the Interior Douglas-fir (IDF), Sub-Boreal Spruce (SBS), Sub-Boreal Pine-Spruce (SBPS), and Interior Cedar-Hemlock (ICH) biogeoclimatic zones. Although aspen can be a strong competitor with shade-intolerant pine, maintaining a low-density aspen component within stands offers many benefits to both individual conifers and the site as a whole. Until recently, managing aspen included reducing its presence among young pine as much as possible by applying aggressive site preparation and brushing treatments. While strategies for managing mixed broadleaf-conifer stands are now changing throughout British Columbia, forest practitioners still require information about threshold levels of broadleaves that can be retained without seriously affecting conifer performance. A retrospective study to investigate the effects of aspen competition on lodgepole pine in the Cariboo region was established in 1992 and, by 1997, results were suggesting that dry-belt (IDFdk) thresholds for aspen as tall or taller than target pine were in the range of 2000-5000 stems ha-1. To investigate pine-aspen interactions further and to more clearly define thresholds for aspen retention in the Cariboo-Chilcotin dry-belt, a variable density study was established in 1998 at a site near Meldrum Creek in the IDFxm subzone. This technical report presents 4th-year results of that study.
Download or read book Adjusting Free growing Guidance Regarding Aspen Retention in the Cariboo Chilcotin written by Teresa A. Newsome and published by . This book was released on 2016 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2008, a Working Group that included British Columbia government staff (researchers, stewardship foresters, and wildlife habitat experts), a research consultant, and industry foresters was formed in the Cariboo Region of south-central British Columbia to determine how existing research concerning conifer#x13;broadleaf competitive relationships could be used to suggest change to free-growing guidelines for that region. The objective was to adjust free-growing criteria concerning broadleaf tree presence in coniferous plantations while maintaining consistency with biological thresholds for conifer growth that had been determined by local research. ...
Download or read book Effects of Variable Aspen Retention on Stand Development Aspen Sucker Production and Stand Development and of Lodgepole Pine in the SBSdw1 Variant of South central British Columbia written by Teresa A. Newsome and published by . This book was released on 2006 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Competitive Effects of Trembling Aspen on Lodgepole Pine Performance in the SBS and IDF Zones of the Cariboo Chilcotin Region of South central British Columbia written by Teresa A. Newsome and published by . This book was released on 2003 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes & presents results of a retrospective study carried out between 1992 and 1999 in the Cariboo-Chilcotin region of British Columbia to quantify the effects of trembling aspen competition on lodgepole pine performance, and to identify competition indices or other measures of competition that could be used by field staff. Target pine were selected across neighbourhoods in six stands with varying densities of aspen. Data pertaining to pine size & condition, and to the size & location of aspen within a 70-inch radius of the pine were collected three times. Measurements began when the stands were seven to 12 years old. Various approaches are used to identify levels of aspen abundance when pine performance declined below acceptable levels. These include analyses of regression & correlation, tests of existing competition indices, and visual & statistical characterization of trends. Finally, conservative recommendations are made for the retention of aspen within pine stands in the Cariboo-Chilcotin region.
Download or read book Ecology and Management of Paper Birch and Black Cottonwood in Southern British Columbia written by Suzanne Simard and published by Forest Science Research Branch, Ministry of Forests. This book was released on 1992 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hardwoods have long been disposed of to create coniferous forests of high quality. Recently, there have been concerns that this policy is a mistake, not only because the demand for hardwoods is growing but because of the negative aspects of growing coniferous monocultures. This analysis examined hardwood inventory, ecology, management, and use issues through a summary of hardwood inventory in the Kamloops Forest Region, a field assessment of management practices and stand conditions in two subzones in the region, and a review of literature related to paper birch and black cottonwood, the predominant species in the productive subzones. The field assessment consisted of the sampling of regeneration stands younger than 20 years to identify management practices that were successful for hardwood, conifer, or mixedwood production. Immature-mature stands older than 20 years were sampled across a range of ecosystems to assess their stand structure, species composition, and growth and yield.
Download or read book Nine year Response of Douglas fir and the Mixed Hardwood Shrub Complex to Chemical and Manual Release Treatments on an ICHmw2 Site Near Salmon Arm written by Suzanne Simard and published by . This book was released on 1996 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest management.
Download or read book PROBE written by Suzanne Simard and published by . This book was released on 1993 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: This land management handbook presents a design protocol that defines minimum standards for an objective, low intensity monitoring system called PROBE. PROBE's purpose is to provide a monitoring framework for use in a wide array of vegetation complexes, ecosystems, and operational vegetation management treatments. The framework standardizes installation location, response measurements and statistical analyses. This method satisfies the basic objective of most operational brushing evaluations, which is to determine the effects of vegetation management treatments on the survival and growth of crop trees, and on the abundance of target non-crop species. The condition of wildlife habitat can be monitored within the PROBE framework and site preparation treatments can also be monitored using PROBE.
Download or read book Establishment to Free Growing Guidebook Cariboo Forest Region written by British Columbia. Ministry of Forests and published by University of British Columbia Press. This book was released on 2000 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on the legal requirements for establishment and maintenance of a free growing stand in the Caribbo Forest Region.
Download or read book Manual Brushing for Forest Vegetation Management in British Columbia written by Denise Hart and published by . This book was released on 1992 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the factors that influence the utility of manual brushing, including the response of target species to manual treatment, the growth response of the crop trees, damage to the crop trees and administrative constraints.
Download or read book Regenerating British Columbia s Forests written by R. Parish and published by UBC Press. This book was released on 2011-11-01 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regenerating British Columbia's Forests will assist those responsible for planning reforestation projects to reach informed decisions and will challenge them to consider primarily the biological factors basic to reforestation success rather than short-term costs and production technology. Although its main audience is practising foresters and forestry students of British Columbia, the text will be of considerable interest to foresters in other parts of Canada, the United States, and Europe who manage reforestation.
Download or read book Autecology of Common Plants in British Columbia written by Sybille Haeussler and published by Forestry Canada, 1990 [i.e. 1991]. This book was released on 1990 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication summarizes the autecological characteristics of 35 vegetation species and provides information on how they respond to various silvicultural treatments now in use on forest lands. Information used in this report was gathered in an extensive search of ecological, silvicultural, and botanical literature, most of which originates in western Canada or western US. Information is given on description, distribution and abundance, habitat, growth and development, reproduction, pests, effects on crop trees, response to disturbance or management, and wildlife and range of each species, listed alphabetically by scientific name.
Download or read book SAS Procedures Guide written by SAS Institute and published by . This book was released on 1988 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
