41 resources found

This extension note introduces Equivalent Clearcut Area, a metric used to assess the potential impact of forest disturbances, like logging or fires, on watershed hydrology in snow-dominated regions of British Columbia. The document explains how ECA is calculated by accounting for the area disturbed and the subsequent forest regrowth, which influences water interception, evaporation, and transpiration. It details the historical development and application of ECA in forest management planning, highlighting its use as an indicator for potential changes in streamflow and peak flow events. While acknowledging ECA's utility as a simplified tool for risk assessment and comparing management options, the note also stresses its limitations, emphasizing that it should not be used as a stand-alone metric due to the complex and variable nature of watershed responses to disturbance.

This document introduces revised estimates for snow recovery in pine-dominated forests of British Columbia's interior, a critical factor for watershed management. Snow recovery refers to the restoration of snow accumulation and melt patterns in regrowing forests after clearcutting, compared to mature forests and clearcut areas. The authors highlight how changes in forest cover significantly impact spring streamflow peaks, making accurate recovery estimates essential for assessing potential hydrologic changes. The study presents new recovery curves based on long-term data from the Thompson-Okanagan region, demonstrating that previous estimates likely overstated the rate of snow recovery, suggesting a more gradual return to pre-harvest conditions as young forests grow taller.

This extension note details the Prince George Small Streams Project, an initiative launched to evaluate the effectiveness of policies aimed at protecting the riparian functions and fish habitat values of small streams. The study assessed how a minimum riparian retention prescription impacted various stream characteristics. While the policy successfully met four of its five management objectives, it ultimately failed to maintain overall fish habitat values, particularly concerning the long-term supply of large woody debris, a significant decrease in litter fall, and an increase in stream temperatures due to reduced shade. Therefore, the authors recommend retaining all trees within 10 meters of the stream bank to better achieve desired environmental outcomes.

This document presents a synoptic assessment of stream and riparian conditions in the Bowron River watershed, conducted 20-30 years after extensive salvage logging. The study investigates the long-term impacts of harvesting, prompted by a spruce beetle outbreak in the 1970s and 80s, on stream health and surrounding riparian areas, which are crucial for ecological balance. Using the Routine Riparian Effectiveness Evaluation, the assessment compares current conditions to historical watershed assessment procedure rankings, revealing that while some recovery has occurred, the lack of mature vegetation in riparian zones continues to significantly impact stream characteristics, particularly the supply of large woody debris whcih is vital for stream morphology and fish habitat. The authors conclude by offering guidance statements to improve forest management practices, emphasizing the importance of riparian buffers, proper road deactivation, and minimizing soil compaction to mitigate ongoing adverse effects.

This research models the impact of forest harvesting on peak streamflows in a small, snow-dominated watershed in British Columbia. Using a sophisticated hydrological model, the study simulated various clearcutting scenarios to understand how the removal of forest cover influences the magnitude and frequency of high flow events. The findings indicate that forest harvesting consistently increases peak flows, with larger, less frequent events showing a more significant response, though the predicted increases were less than 50% even with complete forest removal. The study highlights the importance of watershed characteristics like topography and size in determining the extent of these changes and emphasizes the ongoing need for research to improve water resource management in forested areas.

This document details a research project in British Columbia testing various silvicultural systems beyond traditional clearcutting to manage forests for multiple values, not just timber. The study evaluated the costs, productivity, tree damage, and soil disturbance associated with different harvesting methods used in the first phase of the project. The findings highlight the trade-offs between different approaches, noting that methods like clearcutting were most cost-effective for harvesting, while alternative systems resulted in varying levels of tree damage and soil disturbance.

This document provides guidance on how to conduct salvage harvesting in areas affected by the mountain pine beetle in the Southern Interior Forest Region of British Columbia while maintaining habitat structure and wildlife diversity. It emphasizes that salvage logging, while economically important, can negatively impact ecosystems already disturbed by beetles. The core idea is to use within-stand retention practices like leaving live trees, snags, and downed wood, along with strategically placed partial harvesting, to mimic natural disturbance patterns and create habitats that support a variety of species and aid forest recovery. The report discusses five key issues to consider: loss of mature forest attributes, connectivity, riparian areas, access management, and habitat homogenization, offering strategies to address them.

This extension note focuses on best management practices for riparian areas following salvage logging after wildfires, aiming to minimize negative impacts on aquatic habitats. It acknowledges that while current regulations permit harvesting fire-damaged timber in riparian zones, this can harm both water and land ecosystems by increasing erosion and reducing crucial large woody debris. The document proposes specific guidelines for managing these sensitive areas based on factors like burn severity and the connection of slopes to streams, striving to balance timber recovery with the protection of vital ecological functions and downstream resources.

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 extension note details a study on how adding nutrients affects the growth of young red alder trees on Vancouver Island. Recognizing the increasing importance of red alder for various products and ecological restoration, the research investigates whether fertilization, particularly with phosphorus and other elements, can enhance their early development. The document describes field trials conducted at multiple locations, outlining the experimental setup, fertilization treatments, and the resulting stem growth responses observed in the first year after application. The document aims to provide initial insights into optimizing the growth and quality of red alder through nutrient management in this region.

This extension note presents findings from investigations into how the mountain pine beetle infestation and subsequent salvage harvesting near streams impact small stream and riparian zone health in British Columbia's Sub-Boreal Spruce zone. The research focused on understanding the riparian stand structure in these affected areas and assessing the influence of both the beetle infestation and harvesting on riparian zones, particularly shade levels and overall stream function. Through basal area studies and a stream health evaluation protocol, the authors aimed to provide short-term answers to guide forest management practices in regions heavily affected by the mountain pine beetle.

This extension note details a study on windthrow in partially cut lodgepole pine forests in west-central British Columbia. The research was motivated by concerns that partial harvesting, a strategy used to manage habitat for the blue-listed northern caribou, might increase windthrow to levels that negatively impact caribou habitat, timber supply, and forest health. The study compared windthrow rates in different partial cutting methods to uncut control areas over a 5. 3-year post-harvest period to assess the risk of increased windthrow associated with these silvicultural systems.

This extension note investigates various forest management approaches for complex, dry Interior Douglas-fir forests. The core of the project involves long-term, operational-scale experiments comparing different harvesting methods, such as individual tree selection and patch cutting, against uncut controls across two distinct study areas. The research explores the effects of these treatments on a wide array of ecological factors, including natural disturbances, tree regeneration, vegetation dynamics, microclimate, soils, and wildlife habitat, aiming to understand how different management practices impact forest health and biodiversity. The project seeks to provide practical insights for forest managers to move beyond traditional uniform partial cutting and adopt a broader range of strategies that better reflect the natural variability of these important forest ecosystems.

This extension note investigates the effects of different site preparation methods on a high-elevation wet, cold forest in British Columbia. The study examines the initial responses of planted and natural tree regeneration, soil properties, vegetation, and biodiversity to these treatments within various harvesting systems. The report aims to provide guidance for operational decisions regarding site preparation in these challenging environments, considering both silvicultural success and broader ecological impacts.

This document explores the complex relationship between fire management in fire-prone forests of British Columbia and the dynamics of forest carbon. It highlights the challenge for natural resource managers in determining when fire management actions act as sources or sinks of greenhouse gases. The document discusses forest carbon cycles, the impact of climate change on fire regimes, and various forest management approaches, including fire suppression and fuel reduction, in the context of carbon storage and emissions. The docuemtn aims to inform decision-making by considering carbon dynamics alongside other crucial ecological and economic values in these fire-dependent ecosystems.

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 report details two studies investigating the impacts of common forestry practices on soil health in Interior Cedar-Hemlock forests. The first study compared clearcut harvested areas to adjacent forests, finding that clearcutting generally reduced key indicators of soil food web activity and nitrogen cycling. The second study examined the effects of broadcast fertilization on clearcuts, revealing it boosted nitrogen availability but also increased the potential for nitrogen loss through leaching and denitrification. This research aims to inform foresters and managers about how harvesting and fertilization influence soil ecosystems, suggesting ways to mitigate negative impacts and sustain forest productivity.

This extension note reports on the early findings of the Sicamous Creek Silvicultural Systems project, a long-term study comparing different forestry practices in high-elevation forests of British Columbia. The central theme is the evaluation of clearcutting versus alternative harvesting methods, such as small patch cuts and individual tree selection, regarding their impacts on various ecological and economic factors. The purpose of this note is to summarize initial results concerning harvest costs, regeneration, soil conditions, microclimate, and biodiversity, ultimately aiming to inform more ecologically diverse and sustainable forest management in these sensitive ecosystems.

This extension note reports on a 14-year study investigating how thinning young lodgepole pine stands to different densities and repeatedly fertilizing them with multiple nutrients affects their growth. The central question explored is whether these silvicultural practices can accelerate stand development enough to help offset future timber supply shortages anticipated due to the mountain pine beetle epidemic. The research measured the impact of these treatments on tree size and overall stand volume, aiming to determine optimal strategies for mitigating timber supply challenges in the interior of British Columbia.

This extension note serves as a guide for adapting forest and range management practices in the Skeena Region of British Columbia to the realities of climate change. Recognizing the significant impact of a warming and wetter climate with increased extreme weather on local ecosystems, it synthesizes current climate change research to project future conditions and their ecological consequences. The document outlines potential adaptation strategies for resource professionals and government staff involved in operational planning, effectiveness monitoring, and climate action plans. Ultimately, the goal is to foster resilient ecosystems that can continue to provide essential services and products in the face of ongoing climatic shifts.