28 resources found

This paper challenges the traditional view that stand-initiating fires are the dominant disturbance regime in British Columbia's wet coastal temperate rainforests. Through a comprehensive literature review and analysis of empirical data, the authors argue that fine-scale gap dynamics, resulting from the death of individual or small groups of trees, is the primary process shaping these forests. They present four lines of evidence supporting this, including the prevalence of old-growth forests dominating the landscape, the infrequency of historical fires, and the biophysical conditions that limit fire spread. The paper emphasizes that a better understanding of these natural disturbance patterns, particularly gap dynamics, is crucial for developing sustainable forest management and conservation strategies in British Columbia.

This case study details a research project investigating alternative silvicultural systems to clearcutting in the steep-sloped old-growth forests of the Queen Charlotte Islands (now Haida Gwaii). The study, initiated in 1992, compared the effects of single-tree selection, two levels of group selection, and clearcutting on regeneration (both natural and planted) and residual stand characteristics over a seven-year period. Key findings address the effectiveness of these methods in promoting the regeneration of western hemlock, Sitka spruce, and western redcedar, as well as the impact on residual tree damage and browsing pressure from Sitka black-tailed deer, ultimately aiming to inform sustainable forest management practices in this sensitive ecosystem.

This paper examines the costs and productivity of different timber harvesting methods in the interior wet-belt of British Columbia, specifically focusing on maintaining habitat for mountain caribou. The study compares group selection harvesting, where small patches of forest are removed, with clearcutting and single-tree selection. Its primary purpose is to document the economic implications of a harvesting approach designed to balance timber extraction with the ecological needs of caribou in old-growth cedar-hemlock forests.

This extension note explores alternatives to conventional clearcutting for timber harvesting in visually sensitive areas of British Columbia, specifically within the Columbia Forest District. The central purpose is to identify silvicultural systems and harvesting methods that reduce visual impact while maintaining timber supply and ecological health. The document details various standard units of harvesting, such as shelterwood and commercial thinning, explaining their application and effects on the landscape, often contrasting them with traditional clearcutting. This document emphasizes the importance of balancing economic viability with aesthetic and environmental considerations when managing forest viewscapes.

This document details a case study on commercial thinning of older forests in British Columbia's Interior Hemlock Subzone, a forestry practice aiming to improve the growth and quality of remaining trees. The study, conducted by the Revelstoke Community Forest Corporation, investigates the operational feasibility and economic viability of this approach on an 85-year-old stand. Key findings highlight that commercial thinning can yield a significant volume of timber, increase the value of future crop trees, and potentially enhance wildlife habitat, though careful planning is needed to manage associated costs and operational challenges. The report concludes by summarizing recommendations for future commercial thinning operations, emphasizing the importance of clearly defined crop tree selection criteria and methods to reduce costs.

This document details a case study on patch cutting in old-growth forests within British Columbia, specifically addressing its impact on wildlife habitat and its use as an alternative to clearcut logging. The study examines a group selection silviculture system aimed at balancing timber extraction with the preservation of wildlife corridors and habitat, particularly for species like caribou and mule deer. Key objectives included creating uneven-aged stands, reducing snow interception, minimizing logging impacts, and maintaining a percentage of the block area as old-growth. The findings suggest that while patch cutting is operationally feasible and offers benefits over conventional clearcutting, it still requires careful planning and management to effectively meet both economic and environmental goals.

This document details a case study on varaible retention as a method to restore old-growth forest conditions in British Columbia's East Kootenay region. It explains how historical land management, including fire suppression, drastically altered forest structures, leading to a decline in biodiversity and an increase in fire risk. The study outlines a silvicultural prescription designed to mimic natural disturbances by strategically removing timber, aiming to re-establish the characteristics of pre-settlement old-growth stands, such as varied tree sizes and increased light penetration. The purpose of this study is to demonstrate a sustainable management approach that not only mitigates fire hazards but also enhances wildlife habitat and supports the long-term health of the forest ecosystem.

This extension note details a case study on patch cutting in old-growth forests in British Columbia. The primary purpose of this research was to investigate alternative silviculture systems, specifically patch cutting, as a method to maintain caribou habitat. The study aimed to assess the impact of this harvesting technique on the abundance and dispersal of arboreal lichen, a critical food source for caribou, while also considering its effects on windthrow and other forest health factors.

This document summarizes key findings from two long-term silvicultural research initiatives: the Montane Alternative Silvicultural Systems study and the Variable Retention Adaptive Management experiments. The MASS study, spanning 25 years, compared clearcutting to various alternative methods, revealing that tree growth was best in clearcuts, though other methods offered biodiversity benefits and paved the way for variable retention. The VRAM research explored different retention strategies, identifying windthrow as a significant challenge and demonstrating that retention provides crucial life-boating habitat for various species, with the amount, aggregation, and size of retained areas being critical factors. The research highlights that while increased canopy retention and dispersion can impact tree growth, these alternative systems offer important ecological advantages, particularly for understory vegetation and diverse species.

This document outlines the strategic approach to silvicultural systems in the Great Bear Rainforest, focusing on Ecosystem-Based Management. A central theme is the retention silvicultural system, which involves deliberately leaving trees and vegetation within harvested areas to maintain forest structure and biodiversity. The application of this system is context-dependent, influenced by the proportion of mature and old forest at both the broader landscape unit and immediate cutblock scales, with increased retention mandated where older forests are scarce. Additionally, the document addresses windthrow considerations at both landscape and stand levels, providing guidelines to mitigate damage while prioritizing the retention system in areas of lower wind hazard.

This course offers practical skills and knowledge to understand the effects of fires on natural environments through ecosystem decoding. The course also explores the impacts of, and the interactions between, fire management and forest management over the past 100 plus years. By the end of the course, participants will be able to prepare communities to respond to wildfire threats and create ecosystem resiliency through restoration methods - in fire and forest landscapes with multiple ecological objectives.

This document addresses the challenge of balancing timber harvesting with the conservation of at-risk plant communities that depend on mature and old forest conditions in British Columbia's Coastal Douglas Fir biogeoclimatic zone. Recognizing the scarcity of these older forests, the document outlines silvicultural practices aimed at maintaining existing structural diversity in high-conservation areas and accelerating the development of old-growth characteristics in younger, more homogenous stands. Ultimately, it seeks to equip forest professionals with strategies to enhance the ecological functions of older forests within provincial forest lands.

This report outlines a management strategy for mule deer winter ranges in the Cariboo-Chilcotin region of British Columbia, specifically focusing on transition and deep snowpack zones. Developed through years of research and aligned with existing land use plans, the document provides management objectives and strategies for forest harvesting to maintain and restore suitable habitat. Key areas addressed include access planning, stand age structure, tree species composition, opening sizes for harvests, and the spatial layout of openings. It also includes appendices detailing snowpack zones, biodiversity considerations, forest health management, and a history of related research and planning efforts, aiming to guide forest managers and monitor habitat preservation.

This document details the SADO management system, a conservation-focused approach specifically designed for sustaining old-growth characteristics in aspen, birch, and cottonwood forests within British Columbia's SBS zone. Recognizing the relatively short lifespan and successional vulnerability of these deciduous stands, the system provides a step-by-step guide for forest managers. Its core principles revolve around monitoring regeneration, selectively removing conifers, managing herbivore browsing, ensuring adequate light, and addressing regeneration capacity to promote the development of self-sustaining, all-aged stand structures that continuously exhibit old-growth attributes, with a particular emphasis on maintaining ecological values and biodiversity.

This extension note presents findings on the pre-harvest forest conditions at a group selection logging site within British Columbia's Interior Cedar Hemlock zone. The study's central purpose was to document the stand structure and the presence of wildlife habitat attributes in this old-growth forest before a partial cutting silvicultural system was implemented. By examining aspects like tree species, size, age, and the occurrence of features important for wildlife, the authors aim to provide foundational information for understanding the ecological impacts of partial cutting as an alternative to clearcutting in these valuable ecosystems.

This document serves as a foundational guide for adapting forest management practices in the West Kootenay region of British Columbia in the face of climate change. Recognizing the confirmed reality of climate change and its projected impacts on the region, the report outlines a starting point for forest practitioners to consider and implement adaptation strategies. It structures these strategies across different scales - landscape, ecosystemstand, and operational - offering specific actions relevant to the unique vulnerabilities identified in the northern, mid, and southern subregions of the West Kootenays. Ultimately, the report emphasizes the need for a deliberate and informed decision-making process to select and implement effective adaptation measures, advocating for ongoing monitoring and collaboration among stakeholders.

This document details an analysis using the PrognosisBC model to evaluate various partial-cutting silvicultural options for long-term forest management compared to clearcutting. The authors explore how different harvesting methods in a specific forest type could meet sustainability targets, encompassing biodiversity, visual quality, old-growth recruitment, and timber production over a 100-year rotation. By modeling several scenarios and comparing their outputs, the study aims to familiarize readers with the PrognosisBC tool and demonstrate its utility in assessing trade-offs and informing complex forest management decisions, while also acknowledging the model's limitations and the crucial role of professional judgment.

This study addresses the ecology and management of interior Douglas-fir at the northern extent of its range in British Columbia, particularly within the Prince George Timber Supply Area. The study delves into concerns about a perceived decline in Douglas-fir abundance, exploring its ecological, cultural, and economic significance in this northern environment. It synthesizes existing knowledge on Douglas-fir, examining past and present management practices, its role in local ecosystems including wildlife habitat and soil health, and challenges related to its regeneration, often comparing it with other species like lodgepole pine and spruce. The document serves as a problem analysis and aims to inform the development of an interim management strategy and future research directions for sustaining Douglas-fir in these unique northern landscapes.

This study explores the critical role of fire as a natural process in shaping and sustaining the diverse ecosystems of British Columbia. The first describes the various historical fire regimes across different ecosystem types in the province, categorized by the frequency and intensity of fire events. It then emphasizes the ecological importance of fire, highlighting its contributions to biodiversity, ecosystem complexity, and nutrient cycling. Finally, the text examines ecological approaches to fire management, advocating for strategies that recognize and maintain the beneficial presence of fire on the landscape, while also considering factors like climate change and the presence of species at risk. This report serves as a guide for land managers and decision-makers to integrate ecological perspectives into fire management plans for the long-term health and resilience of British Columbia's forests and rangelands.

This report addresses the critical issue of maintaining large, old trees in United States forests that historically experienced frequent fires but have been subjected to long periods of fire suppression. The document synthesizes existing research to understand how reintroducing fire through prescribed burning impacts these venerable trees, particularly concerning injury and mortality. It delves into the causes of tree death from fire, including heat damage to crowns, cambium, and roots, with a specific focus on the role of accumulated duff and subsequent bark beetle attacks. Furthermore, the report examines management options and treatment effects aimed at enhancing old tree resilience during prescribed burns, offering practical guidance on techniques like duff raking and burning under specific conditions, ultimately striving to balance ecological restoration with the conservation of these keystone forest components.