The Structure And Development Pattern Of Mixed Species Forest Stands In The Interior Cedar Hemlock Zone
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The Structure And Development Pattern Of Mixed Species Forest Stands In The Interior Cedar Hemlock Zone
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Author : Philip LePage
language : en
Publisher:
Release Date : 1995
The Structure And Development Pattern Of Mixed Species Forest Stands In The Interior Cedar Hemlock Zone written by Philip LePage and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Forest ecology categories.
A field study was established to explore stand structure and development patterns of mature, mixed-species forests in the Interior Cedar-Hemlock (ICH) zone: moist cold subzone of northwestern British Columbia. The species of interest in the study area were: western hemlock (Tsuga heterophylla (Raf.) Sarg.), western redcedar (Thuja plicata Donn), lodgepole pine (Pinus contorta var. latifolia Engelm.), hybrid spruce (Picea glauca (Moench) Voss x sitchensis (Bong.) Carr.), subalpine fir (Abies lasiocarpa (Hook.) Nutt.), and paper birch (Betula papyrifera Marsh.). Eighty stand structure plots, 150 to 600 m2 in size, were used to assess the species, size and age variation within the study area. Three representative plots, 1,000 m2 in size, were then selected for destructive sampling. Stand reconstruction techniques were used to: 1) characterize the existing species, age and height / diameter structure, 2) describe and quantify the historical height development pattern, 3) describe the development stage and spatial pattern of the stand and it's different components and 4) determine the influence of the above characteristics on the current stand composition and structure. The study stand is 135 years old and originated after a stand destroying wild fire. The resulting mixed-species stand had a very long recruitment period and is currently near the end of the stem exclusion stage of development. Because of the variety of growth patterns exhibited by the different species, neither individual tree height nor diameter were good indicators of stand age structure. The age structure and stage of development were much better defined by direct measures of age, stand density, the diameter distribution / mortality relationship or the overall spatial pattern. Although partially influenced by age structure and spatial arrangement, the developmental pattern of the mixed-species stand was most strongly related to individual height growth characteristics and inter-tree competition. While lodgepole pine, hybrid spruce, western redcedar and paper birch developed in height along characteristically predictable lines, western hemlock exhibited a number of different growth patterns. Subalpine fir followed an atypical, aggressive height growth pattern, developing more like a pioneer species. The variety of height growth patterns frequently allowed younger trees to overtop older individuals, both within and between species. This resulted in numerous shifts in height dominance by different species during the first 80 years of stand development. Forest structure is intimately related to disturbance type and intensity, site quality and the availability of seed or propagules for regeneration. This study examined the structure and development pattern of one type of mixture of tree species common to the ICH zone of northwestern British Columbia. Any difference in the factors listed above would likely produce a different species mixture and therefore a different structure and development pattern. Because most silvicultural operations are tied to the different structures at various stages of stand development, a more complete understanding of these patterns will allow managers to better predict the growth impacts of a variety of treatments and work with, rather than against the natural system.
The Date Creek Silvicultural Systems Study In The Interior Cedar Hemlock Forests Of Northwestern British Columbia
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Author : K. Dave Coates
language : en
Publisher: British Columbia, Ministry of Forests, Research Program
Release Date : 1997
The Date Creek Silvicultural Systems Study In The Interior Cedar Hemlock Forests Of Northwestern British Columbia written by K. Dave Coates and has been published by British Columbia, Ministry of Forests, Research Program this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Clearcutting categories.
The Date Creek silvicultural systems study was one of several projects established in British Columbia in the early 1990s to examine alternatives to traditional clear-cut harvesting. The study comprises a multidisciplinary set of experiments that examines ecosystem processes and timber production in undisturbed, partially cut, and clear-cut stands within the transitional coastal-interior forests of north-western British Columbia. This report provides background information on the Date Creek study in three major sections. The first is an overview of the study area, its climate, soils, vegetation, and the experimental design and silvicultural treatments used in the research. The second section supplies detailed information on the research area (ecosystem mapping and soils) and the individual treatment units (ecosystems, soils, pre- and post-treatment stand structure). The final section outlines the objectives of individual experiments under way.
Canadian Journal Of Forest Research
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Author :
language : en
Publisher:
Release Date : 2008
Canadian Journal Of Forest Research written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Forests and forestry categories.
Silviculture Of Temperate And Boreal Broadleaf Conifer Mixtures
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Author : P. G. Comeau
language : en
Publisher:
Release Date : 1996
Silviculture Of Temperate And Boreal Broadleaf Conifer Mixtures written by P. G. Comeau and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Nature categories.
This volume presents papers given at a workshop held to review current knowledge of the silviculture of temperate and boreal broadleaf-conifer mixtures and the consequences of growing mixed stands. Topics of the papers include the importance of mixedwood stands, managing birch-dominated mixed stands, competition dynamics, silvicultural systems, stand dynamics, vegetation management, red alder-conifer stands, mixedwood management research, white spruce and aspen stands, vertical stratification in mixed-species stands, habitat management for game and parasite control, simulation of long-term impacts of alder/fir mixtures, understory protection, fertilisation, control of spruce weevils, and litter decomposition.
Frda Ii Program 3 0 Research
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Author : British Columbia. Ministry of Forests
language : en
Publisher:
Release Date : 1996
Frda Ii Program 3 0 Research written by British Columbia. Ministry of Forests and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Technology & Engineering categories.
Forestry projects, forest management, sustainable forestry.
Canadian Journal Of Botany
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Author :
language : en
Publisher:
Release Date : 2000
Canadian Journal Of Botany written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Botany categories.
Hemispherical Photography In Forest Science Theory Methods Applications
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Author : Richard A. Fournier
language : en
Publisher: Springer
Release Date : 2017-05-11
Hemispherical Photography In Forest Science Theory Methods Applications written by Richard A. Fournier and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-05-11 with Technology & Engineering categories.
This book presents practical information about hemispherical photography from the perspectives of field data acquisition, image processing and information retrieval methods. This book is organized into three sections. The first section describes what is hemispherical photography and what are the fundamental elements of forest structure and light interactions within the forest canopy. The second section provides practical information about the equipment, procedures and tools for procuring, processing and analyzing hemispherical photographs. Armed with this information, the third section describes several applications of hemispherical photographs to forestry and natural resource assessment. The book concludes with a discussion about modelling tools and future directions of this rapidly growing field. There is currently no information source on the market that has this comprehensive range of topics combined in a single book. The book will appeal to academics, graduate students, natural resource professionals and researchers alike.
The Forestry Chronicle
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Author :
language : en
Publisher:
Release Date : 2003
The Forestry Chronicle written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Forests and forestry categories.
Frda Report
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Author :
language : en
Publisher:
Release Date : 1996
Frda Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Forests and forestry categories.
Site Index Estimates By Site Series For Coniferous Tree Species In British Columbia
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Author : British Columbia. Ministry of Forests
language : en
Publisher: British Columbia, Ministry of Forests
Release Date : 1997
Site Index Estimates By Site Series For Coniferous Tree Species In British Columbia written by British Columbia. Ministry of Forests and has been published by British Columbia, Ministry of Forests this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Technology & Engineering categories.
Site index is a measure of forest site growth potential, and is important for forest management and timber supply analysis. This document presents a first approximation of estimates of average site index for coniferous crop tree species according to site units of the biogeoclimatic ecosystem classification (BEC) system of British Columbia. The estimates are displayed in site index/site unit tables. Information is included on site index, content and reliability of the tables, the method used to produce the tables, the relationship between site index and other site variables, had how to use the BEC method to estimate site index in the field.