-
Natural Regeneration of Lodgepole Pine Following Partial Harvesting on Northern Caribou Winter Range in West-Central British Columbia
This paper investigates how well lodgepole pine forests naturally regrow after partial harvesting in important winter habitats for northern caribou in west-central British Columbia. The study compares the density and growth of new pine seedlings in s...This paper investigates how well lodgepole pine forests naturally regrow after partial harvesting in important winter habitats for northern caribou in west-central British Columbia. The study compares the density and growth of new pine seedlings in small harvested openings across two different subzones and under three different partial harvesting methods over a seven-year period. A key focus is understanding if these methods can successfully regenerate the forest without harming the lichens that the caribou rely on for food, ultimately aiming to inform forest management practices that balance timber harvesting and wildlife conservation. -
Forest Carbon and Management Options in an Uncertain Climate
This extension note explores managing British Columbia's forests to act as ongoing carbon sinks in the face of a warming climate. It emphasizes that forest management for carbon sequestration needs to consider the likely changes in natural disturbanc...This extension note explores managing British Columbia's forests to act as ongoing carbon sinks in the face of a warming climate. It emphasizes that forest management for carbon sequestration needs to consider the likely changes in natural disturbances and offers various silvicultural tools and landscape-level strategies that managers can employ. The extension note highlights the importance of balancing carbon objectives with other forest values like biodiversity and timber production, acknowledging the complexities and uncertainties of long-term climate impacts. -
Disturbance Regimes in Coastal British Columbia
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 ...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. -
Adjusting Free Growing Criteria for Broadleaves in the Northern Interior of British Columbia
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 reviewi...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. -
Drought in a Changing BC Climate
This presentation outlines the critical issue of ecological drought in British Columbia, distinguishing it from lack of precipitation by emphasizing the role of water deficit relative to average conditions and evapotranspiration. The core concern hig...This presentation outlines the critical issue of ecological drought in British Columbia, distinguishing it from lack of precipitation by emphasizing the role of water deficit relative to average conditions and evapotranspiration. The core concern highlighted is how increasing temperatures due to climate change will intensify drought frequency and severity, despite potential precipitation increases, by reducing snowpacks and increasing water loss from the environment. The presentation explores recent drought occurrences, linking them to climate change and natural climate variability, and introduces a Forest Drought Risk Assessment Tool designed to evaluate and predict drought impacts on forests. The purpose of this presentation is to emphasize the urgent need to integrate climate change considerations into forestry practices to mitigate future ecological impacts. -
Levels Of Growing Stock Cooperative Study in Douglas-fir Report No. 16 – Sayward Forest and Shawnigan Lake
This document is a part of a long-running Levels-of-Growing-Stock (LOGS) Cooperative Study in Douglas-fir stands, specifically detailing findings from installations at Sayward Forest and Shawnigan Lake in British Columbia. The core objective of the L...This document is a part of a long-running Levels-of-Growing-Stock (LOGS) Cooperative Study in Douglas-fir stands, specifically detailing findings from installations at Sayward Forest and Shawnigan Lake in British Columbia. The core objective of the LOGS study is to understand how different thinning intensities impact cumulative wood production, individual tree size, and growth ratios in young Douglas-fir stands. This progress report summarizes data from these two Canadian sites, showing that volume growth is strongly tied to the amount of growing stock retained, and that thinning significantly influences tree size distribution and live crown development, suggesting potential for future productivity gains. The study also offers comparisons between various thinning regimes and unthhinned control plots, revealing the long-term implications of silvicultural practices on forest stands. -
Prioritizing Commercial Thinning Quantification of Growth and Competition with High-Density Drone Laser Scanning
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, spec...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. -
The Economic Feasibility of Commercial Thinning in Second Growth Forests on the British Columbia Coast
This document investigates the economic viability of commercial thinning in second-growth forests on British Columbia's coast. Using the TIPSY 4.2 modeling software, the author simulates various scenarios by inputting existing forest data and economi...This document investigates the economic viability of commercial thinning in second-growth forests on British Columbia's coast. Using the TIPSY 4.2 modeling software, the author simulates various scenarios by inputting existing forest data and economic variables to predict stand yields and financial outcomes. While acknowledging the environmental and silvicultural benefits of commercial thinning (like improving stand quality, accelerating wood volume, and enhancing biodiversity) the study's initial findings suggest that, under current conditions, commercial thinning is not economically feasible. However, it also explores the potential for future use, considering factors such as different thinning intensities, harvesting methods, and the impact of government assistance programs. -
Combining Thinning and Diverse Plantings to Adapt to Climate Change Induced Timber Supply Shortage in British Columbia
This paper explores strategies to mitigate timber supply shortages in British Columbia (BC), a problem exacerbated by climate change and past natural disturbances like the mountain pine beetle outbreak. The authors investigate two primary forest mana...This paper explores strategies to mitigate timber supply shortages in British Columbia (BC), a problem exacerbated by climate change and past natural disturbances like the mountain pine beetle outbreak. The authors investigate two primary forest management approaches: commercial thinning and diverse plantings, including assisted species migration. By simulating the long-term effects of these interventions in a case study area, the study concludes that combining commercial thinning with species diversification offers the most promising solution to sustain future timber supply in BC, emphasizing the importance of adaptive forest management in the face of environmental challenges. -
Status of British Columbia Long-Term Silvicultural Systems Research Trial
This document is a detailed inventory of numerous forestry research projects across British Columbia. It systematically catalogues various long-term studies examining different silvicultural systems, which are methods for managing forest growth and h...This document is a detailed inventory of numerous forestry research projects across British Columbia. It systematically catalogues various long-term studies examining different silvicultural systems, which are methods for managing forest growth and harvesting timber. The document is structured geographically, listing trials in the Southern Interior, Northern Interior, and Coast regions, as well as smaller, province-wide trials, university research forests, demonstration areas, and operational case studies. For each listed project, the document typically provides information such as the establishment year, location, ecological zone, tested silvicultural systems (like clearcutting, shelterwood, and group selection), trial objectives (e.g., impacts on regeneration, wildlife, or disease), and often a list of associated publications and contact information, highlighting the extensive research network in the province. -
Cost and Productivity of Alternative Harvesting in BC's Interior Wet Belt Designed to Maintain Cariboo Habitat
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, wher...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. -
Evaluating the Effects of Partial Cutting on Wildlife, Trees, and Coarse Woody Debris
This paper explores the effects of partial cutting, a forest management technique aimed at creating stands similar to natural uneven-aged forests, on wildlife trees and coarse woody debris in the wet forests of interior British Columbia. The authors ...This paper explores the effects of partial cutting, a forest management technique aimed at creating stands similar to natural uneven-aged forests, on wildlife trees and coarse woody debris in the wet forests of interior British Columbia. The authors introduce a new classification system based on functional habitat features ("Types") of these dead and dying wood components that are crucial for various wildlife species. By presenting preliminary data from a long-term study, the paper investigates how different partial cutting methods, specifically single tree selection and group selection, influence the occurrence of these vital habitat structures, ultimately seeking to inform forest management practices for biodiversity conservation. -
Commercial thinning effects on growth, yield and mortality in natural lodgepole pine stands in Alberta
This study investigates how commercial thinning impacts the growth, yield, and mortality of natural lodgepole pine forests in Alberta, Canada. Faced with a predicted timber shortage due to fires and mountain pine beetle infestations, the research exp...This study investigates how commercial thinning impacts the growth, yield, and mortality of natural lodgepole pine forests in Alberta, Canada. Faced with a predicted timber shortage due to fires and mountain pine beetle infestations, the research explores thinning as a strategy to increase mid-term sawlog supply by accelerating tree growth and enabling earlier timber access. The findings reveal that while thinned stands initially show less volume, they ultimately demonstrate a greater cumulative volume gain when factoring in the wood removed during thinning. This benefit stems from increased individual tree diameter and live crown ratio for remaining trees and a significant reduction in overall tree mortality, particularly among smaller trees. -
Commercial thinning in white spruce stands
This report details a commercial thinning study conducted in white spruce stands near Calling Lake, Alberta, in 2002, with the aim to understand its impact on forest growth, yield, and overall development. The study investigated three different remov...This report details a commercial thinning study conducted in white spruce stands near Calling Lake, Alberta, in 2002, with the aim to understand its impact on forest growth, yield, and overall development. The study investigated three different removal levels (30%, 50%, and 70% of basal area), along with an uncut control. Key aspects examined were the productivity and cost-effectiveness of harvesting and forwarding operations using a Timberjack harvester and forwarder, the extent of damage to residual trees, and the influence of non-merchantable brush on harvester efficiency. The findings indicate that higher removal levels generally led to increased productivity for both machines, and that pre-harvest brushing significantly improved harvester efficiency by enhancing visibility and reducing wasted cuts. -
Recent Crown Thinning in a Boreal Black Spruce Forest Does Not Reduce Spread Rate Nor Total Fuel Consumption Results from an Experimental Crown Fire in Alberta Canada
This paper details an experimental crown fire conducted in an Alberta, Canada, boreal black spruce forest to assess the effectiveness of recent crown thinning as a fuel treatment. Researchers ignited a 3. 6-hectare fire, observing its behavior in bot...This paper details an experimental crown fire conducted in an Alberta, Canada, boreal black spruce forest to assess the effectiveness of recent crown thinning as a fuel treatment. Researchers ignited a 3. 6-hectare fire, observing its behavior in both untreated and thinned sections. The key finding was that while thinning led to a significant reduction in fire intensity, it did not reduce the fire's spread rate nor total fuel consumption. This suggests that in dense boreal black spruce with high surface fuel loads and low crown base heights, thinning alone may not prevent the rapid progression of crown fires, but it could potentially aid suppression efforts by reducing the intensity. -
Out of the Ashes Ecological Resilience to Extreme Wildfires Prescribed Burns and Indigenous Burning in Ecosystems
This paper investigates the differential ecological impacts of an extreme 2017 wildfire versus ongoing prescribed burns in Waterton Lakes National Park, AB. The core objective is to understand how reintroducing historical land-use processes, particul...This paper investigates the differential ecological impacts of an extreme 2017 wildfire versus ongoing prescribed burns in Waterton Lakes National Park, AB. The core objective is to understand how reintroducing historical land-use processes, particularly through Traditional Ecological Knowledge, can enhance ecosystem resilience against modern stressors like climate change and invasive species. The study focuses on the Kenow wildfire's high-severity effects on a native-grass prairie compared to lower-severity prescribed burns, suggesting that while prescribed burning is beneficial, incorporating the full historical eco-cultural context, including the role of free-ranging bison and late-season Indigenous burning practices, is crucial for effective ecological restoration. The authors conclude that extreme disturbance is not necessarily catastrophic and that combining TEK with adaptive co-management can create landscapes more resilient to pervasive change. -
Regeneration Development and Density Management in Aspen Stands
This document delves into the critical aspects of aspen silviculture, addressing the increasing complexity of managing aspen forests due to greater utilization and evolving approaches to mixedwood management. The authors review the mechanisms of aspe...This document delves into the critical aspects of aspen silviculture, addressing the increasing complexity of managing aspen forests due to greater utilization and evolving approaches to mixedwood management. The authors review the mechanisms of aspen regeneration, both through root suckering and seeds, and offer preliminary guidelines for managing the density of aspen stands in their early development. The paper aims to synthesize existing knowledge and identify knowledge gaps to better inform management decisions aimed at achieving various forest composition objectives. -
Establishing and Growing Aspen Stands in the SBS
This presentation focuses on the establishment and growth of aspen stands within the Sub-Boreal Spruce zone of British Columbia. It draws upon existing research to discuss key factors influencing aspen regeneration, including the importance of remov...This presentation focuses on the establishment and growth of aspen stands within the Sub-Boreal Spruce zone of British Columbia. It draws upon existing research to discuss key factors influencing aspen regeneration, including the importance of removing apical dominance through disturbances like logging or fire to promote suckering. The presentation also details harvest considerations, such as the benefits of winter harvesting and the negative impacts of excessive canopy retention and soil compaction. The presentation explores the effects of various silvicultural practices and the interactions between aspen and coniferous species like spruce and pine, providing guidance on site selection and stockingregeneration surveys for successful aspen management. -
Alternative Silvicultural Systems and Harvesting Techniques for Caribou Habitat
This study investigates alternative forestry practices to mitigate the negative impacts of conventional clearcutting on caribou habitat. Recognizing that clearcutting leads to habitat loss and increased predation on caribou through apparent competiti...This study investigates alternative forestry practices to mitigate the negative impacts of conventional clearcutting on caribou habitat. Recognizing that clearcutting leads to habitat loss and increased predation on caribou through apparent competition, the report reviews various silvicultural systems and harvesting techniques, analyzing their potential to maintain old-growth characteristics, limit forage for other ungulates, and minimize access. Through a literature review and expert interviews, the study assesses the applicability of methods like partial harvesting, understory protection, and intensive silviculture in the Alberta context, considering ecological, economic, and practical challenges. The report aims to identify strategies that balance timber harvesting with caribou conservation, acknowledging that site-specific conditions and careful implementation are crucial for the success of any alternative approach. -
Aspen Distribution in North-Central British Columbia Abundance Trends and Implications for Shallow Water Wetlands
This study focuses on aspen, a vital broadleaf tree, examining its distribution and health in north-central BC and the various threats it faces, including climate change, forest management practices, and ungulate grazing. It explores the ecological i...This study focuses on aspen, a vital broadleaf tree, examining its distribution and health in north-central BC and the various threats it faces, including climate change, forest management practices, and ungulate grazing. It explores the ecological implications of potential aspen declines, specifically considering the relationship between aspen and beaver-created shallow water wetlands, offering recommendations for future research and management.
