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 PDF Download
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Author: Teresa A. Newsome
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 48
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Book Description
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.
Author: Teresa A. Newsome
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 48
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Book Description
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.
Author: Teresa A. Newsome
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 44
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Book Description
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.
Author: Allan Dobb
Publisher:
ISBN: 9780772666437
Category : Range management
Languages : en
Pages :
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Book Description
Author: British Columbia. Ministry of Forests
Publisher:
ISBN:
Category : Habitat conservation
Languages : en
Pages : 0
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Book Description
The Forest Practices Code guidebooks help forest resource managers plan, prescribe and implement sound forest practices that comply with the Forest Practices Code. This guidebook is designed to be a "fine filter" approach to addressing habitat requirements of critical wildlife, in addition to the "coarse filter" approach provided by the Biodiversity Guidebook and the Riparian Management Area Guidebook.
Author: British Columbia. Ministry of Forests
Publisher: University of British Columbia Press
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 992
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Book Description
Focuses on the legal requirements for establishment and maintenance of a free growing stand in the Caribbo Forest Region.
Author: British Columbia. Ministry of Forests
Publisher:
ISBN: 9780772646637
Category : Forest management
Languages : en
Pages : 162
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Book Description
Author: British Columbia. Forest Service
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 68
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Book Description
The Forest Practices Code guidebooks help forest resource managers plan, prescribe and implement sound forest practices that comply with the Forest Practices Code. This guidebook is intended to help forest managers meet Forest Practices Code standards with respect to planning, collecting, registering and using seed and vegetative material.
Author: British Columbia. Forest Practices Branch
Publisher: British Columbia, Forest Practices Branch
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 110
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Book Description
Stand density management is the process of controlling tree density within a stand to achieve desired objectives. Stand density management practices include the spacing of planted trees, pre-commercial thinning, and commercial thinning. A sound density management prescription must consider three elements of prediction: biological responses of the stand to treatment, economic implications of the treatment, and forest-level effects of the treatment. This document provides essential information on each of these elements, and provides a structured decision process for making site-specific density management prescriptions. Sections of the document cover the biological concepts of timber production, economic principles of timber production, forest planning considerations, the decision process, and density management planning tools. Includes glossary.
Author: British Columbia. Ministry of Forests
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 56
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Book Description
A stand management prescription is a document for describing actions to be carried out on a free-growing site to see that stand management activities are planned and implemented to maintain or enhance site productivity, to ensure that resource values are identified and taken into account, and to set out a series of stand management activities to produce a stand that meets the management objectives. This guide provides a logical sequence of steps on how to prepare and administer a stand management prescription in accordance with the Forest Practices Code of British Columbia. These steps include identification and collection of background information, setting of stand-level resource objectives, conducting fieldwork, preparation of the final prescription, production of the stand management prescription map, and administration.
Author: Teresa A. Newsome
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 90
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Book Description
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.
