32 resources found

This paper explores how wildfires and beetle communities interact to influence Douglas-fir beetle outbreaks in British Columbia's forests. Traditionally, DFB populations are expected to surge after fires due to an abundance of weakened trees, but this study reveals a more complex dynamic. The presence of woodboring beetles, which also colonize fire-injured trees, can significantly constrain DFB population growth through interspecific competition. Specifically, when woodborers infest over 50% of trees in a stand, DFB reproduction falls below replacement levels, suggesting that these competitors can suppress potential DFB irruptions and ultimately influence forest resilience after disturbances.

This report details a second timber harvest entry conducted on a mule deer winter range in British Columbia, thirty years after the initial logging. The study examines the application of General Wildlife Measures for shallow and moderate snowpack zones, focusing on a clumpy single-tree selection silvicultural system designed to balance timber harvesting with maintaining and enhancing mule deer habitat. Key aspects explored include the planning and operational implementation of this approach, including the creation of small canopy gaps and thinning from below, along with the lessons learned regarding ecological impacts, adherence to regulations, and operational feasibility. The report serves to document this long-term research project's progression and inform future management practices on similar winter ranges.

This paper analyzes the record-breaking 2023 wildfires in British Columbia, detailing their significant ecological and social impacts, which are seen as the result of a century of altered relationships with fire intensified by climate change. The authors argue for an urgent transformative shift towards coexisting with wildfire, moving beyond suppression to embrace its ecological role and Indigenous stewardship practices. The paper proposes six interrelated strategies to achieve this coexistence: diversifying wildfire response, increasing suppression capacity, mitigating community risk, implementing landscape fire management, transforming wildfire governance, and strengthening expertise. This paper emphasizes the need for a holistic, all-of-society approach involving policy changes, sustained funding, and collaboration to build resilience against future extreme wildfires.

This document investigates the long-term effects of pre-commercial stand thinning in lodgepole pine forests in British Columbia, specifically examining 30-year responses across a range of thinning densities. The central focus is on whether heavy thinning can simultaneously enhance forest productivity, measured by merchantable wood volume and carbon storage, and accelerate the development of old-forest structural attributes important for wildlife conservation. Findings revealed that heavy thinning did create large dominant trees with substantial crowns and other old-growth features, partially supporting the goal of restoration of old-forest structural attributes, and restored much of the lost carbon storage through crown growth. This study suggests that the structural complexity created by heavy thinning, rather than forest age alone, may be sufficient to sustain comparable total abundance, species richness, and diversity of forest-floor small mammals to that found in old-growth stands, highlighting a viable silvicultural approach to address timber needs and ecological restoration.

This paper introduces the retention system, a silvicultural system to align forest management with the principles of ecosystem management, moving beyond a singular focus on sustained production of timber. This system is specifically designed to implement the variable retention approach to harvesting, which prioritizes retaining trees and structures for ecological objectives, such as maintaining structural heterogeneity and protecting biological legacies. The paper argues for the necessity of this new terminology to clearly convey the intent of management where the maintenance of ecological complexity is as crucial as traditional yield expectations, acknowledging that these goals may reduce timber productivity. The retention system is defined by its requirement to maintain long-term structural diversity and ensure forest influence over the majority of the harvested area.

This extension note focuses on the hydrological equivalent clearcut area as a tool for managing forests in British Columbia that have been affected by natural disturbances like mountain pine beetle infestations. It explores how different stand-level treatments, such as salvaging timber and replanting, can influence ECA over time compared to leaving stands unsalvaged. The author examines the contributions of various stand components-including surviving trees, dead snags, and regeneration-to ECA and compares the cumulative hydrological effects of different management strategies using ECA years. The document provides a decision framework to help forest managers consider hydrological values, especially when detailed assessments aren't possible, while also acknowledging other important ecological and economic factors in rehabilitation decisions.

This documentinvestigates the growth dynamics of mixed broadleaf-conifer stands and a push for improved forest management that better reflects multiple objectives, as outlined in the Forest and Range Practices Act. The report achieves this by reviewing existing literature on the silvicultural traits and competitive interactions of both planted conifers and naturally regenerating broadleaf species in the northern interior, alongside the ecological and silvicultural benefits of retaining broadleaves. The study proposes alternative free-to-grow criteria specifically designed to encourage the retention of broadleaf species in the Prince George, Robson Valley, and Mackenzie Timber Supply Areas, aiming for implementation within BCTS Prince George's Forest Stewardship Plan.

This document introduces a method for prioritizing commercial thinning in forests by integrating high-density drone laser scanning (DLS) data with tree-ring measurements. This research uses DLS to quantify individual tree growth and competition, specifically identifying that crown volume is the strongest predictor of recent basal area growth. This innovative approach allows for the creation of detailed spatial maps, including a new "growth competition index," which can guide forest managers in optimizing thinning strategies across large areas, moving beyond traditional stand-level assessments to a more precise, intra-stand management. The study emphasizes how this technology provides timely, fine-scale information to enhance the efficiency and effectiveness of silvicultural practices, particularly commercial thinning.

This document investigates how partial harvesting strategies, designed to enhance mule deer habitat and allow timber extraction in British Columbia's dry Douglas-fir forests, impact complex interactions with natural disturbances like insect outbreaks and wildfires. The study, spanning 30 years, found that while short-term harvesting altered forest structure and reduced the immediate risk of crown fires and Douglas-fir beetle infestations, many of these structural and susceptibility changes reverted over the long term. The removal of harvesting residuals proved more significant in mitigating long-term disturbance risks, particularly for Douglas-fir beetles and intense surface fires, than the time elapsed since the treatment itself. The authors conclude that sustainable forest management integrating timber extraction and mule deer habitat conservation is achievable if partial harvesting occurs at intervals of 30 years or less and residuals are promptly cleared.

This paper introduces walking on two legs, an Indigenous framework for ecosystem restoration and reconciliation in fire-adapted landscapes, particularly in Western Canada. The concept advocates for balancing Indigenous knowledges with Western scientific knowledge, ensuring that Indigenous perspectives and stewardship ethics guide the interconnected processes of restoration and reconciliation. The authors argue that genuine reconciliation requires Indigenous-led restoration of lands, knowledges, and cultures, moving beyond simply integrating Indigenous knowledge into existing Western frameworks. This approach aims to rebuild respectful relationships between people and the land, addressing the legacies of colonialism and revitalizing Indigenous practices like fire stewardship.

This paper highlights the crucial role of boundary spanners in addressing the escalating challenge of wildfires in Western Canada. These individuals and organizations bridge critical gaps, spanning different knowledge systems, organizations, and geographical areas, to foster collaboration and implement proactive fire management strategies, such as cultural and prescribed burning. The authors emphasize that despite the vital work of boundary spanners in building trust, sharing knowledge, and developing capacity, their contributions are often undervalued and lack sufficient institutional support. The piece concludes by asserting the urgent need for dedicated investment in boundary spanning roles to effectively integrate diverse expertise and facilitate collaborative, equitable solutions for wildfire management.

This paper examines the critical role of cultural burning practiced by Indigenous Peoples in managing ecosystems and reducing wildfire risks. Despite its ecological benefits and long history, the paper highlights significant barriers hindering the resurgence of Indigenous fire stewardship, including legal and governance obstacles, lack of access to training and accreditation, liability and insurance issues, and insufficient resources. The authors argue for the necessity of decolonizing wildfire management by recognizing Indigenous knowledge systems, respecting Indigenous governance, and creating pathways for Indigenous-led fire stewardship to ensure more effective and socially just coexistence with fire in Canada. The paper calls for concrete actions to support and empower Indigenous communities in leading fire management on their territories.