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Background, Aim and Scope:: Large-scale deforestation is occurring in subarctic North America following clearing by salvage logging or insect attack, numerous shrubs, herbs and deciduous tree species tend to dominate areas on which stands of white spruce have grown. In the absence of economically advantageous mechanical methods, several herbicides have value in efforts to reforest by planting white spruce. Glyphosate, imazapyr, triclopyr and hexazinone are all capable of selectively removing many competing species, but there is concern about whether they would degrade naturally or persist owing to the frigid climate. Materials and Methods: We established test plots with all four herbicides in upland and riverbottom...
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Assisted migration (AM) is often presented as a strategy to save species that are imminently threatened by rapid climate change. This conception of AM, which has generated considerable controversy, typically proposes the movement of narrowly distributed, threatened species to suitable sites beyond their current range limits. However, existing North American forestry operations present an opportunity to practice AM on a larger scale, across millions of hectares, with a focus on moving populations of widely distributed, nonthreatened tree species within their current range limits. Despite these differences (and many others detailed herein), these two conceptions of AM have not been clearly distinguished in the literature,...
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Protection and sustainable forest management are related but unique, with protection focusing on minimising risk to ecosystems and sustainable management emphasising economic development. Given these distinct roles, a defining characteristic of the relationship between the two approaches is their relative abundance and distribution. The relationship is currently imbalanced, with only 12% of Canada allocated to protection, indicating that ecological values have historically been traded off in favour of resource production. The intactness of Canada's boreal forest provides an opportunity for a more holistic approach that conserves its globally significant environmental attributes while also supporting resource production....
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The objective of this study was to examine the impact of summer throughfall on the growth of trees, at upland and floodplain locations, in the vicinity of Fairbanks, Alaska. Corrugated clear plastic covers were installed under the canopy of floodplain balsam poplar/white spruce stands and upland hardwood/white spruce stands to control soil moisture recharge as a result of summer precipitation. The covers were installed in 1989 and tree growth measurements were conducted through 2005. Soil moisture dynamics were measured using TDR techniques. Tree basal area growth at dbh in the control plots was approximately twice as high on the floodplain compared to the upland. Summer throughfall exclusion significantly decreased...
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We reviewed the application of carbaryl (1-naphthyl N-methylcarbamate) against bark beetles (Scolytidae) in forest trees (Pinaceae) of North America. Our objective was to encapsulate carbaryl’s 30-yr history of successes and limitations against these beetles and to present appropriate safety and environmental information that relates to this usage. carbarylbark beetlesenvironmental safetyacetylcholinesteraseScolytidaePinaceae© 2001 Entomological Society of AmericaThis is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits non-commercial reuse, distribution, and reproduction in any medium,...


map background search result map search result map Placing Forestry in the Assisted Migration Debate Maintaining the role of Canada's forests and peatlands in climate regulation Successional Changes in Carbon Stocks After Logging and Deforestation for Agriculture in Interior Alaska: Implications for Boreal Climate Feedbacks Wildfire evacuations in Canada 1980-2007 Dissipation of four forest-use herbicides at high latitudes Regulation of boreal forest understory vegetation: the roles of resources and herbivores Knowing a socially sustainable forest when you see one: implications for results-based forestry Plant species diversity on logged versus burned sites in central Alaska Spruce beetles and forest ecosystems in south-central Alaska: A review of 30 years of research Effects of moisture limitation on tree growth in upland and floodplain forest ecosystems in interior Alaska [electronic resource] Balancing the Relationship Between Protection and Sustainable Management in Canada's Boreal Forest Evaluating Natural Reserve Design Efficacy in the Canadian Boreal Forest Using Time Series AVHRR Data Early white spruce regeneration treatments increase birch and reduce aspen after 28 years: Toward an integrated management of boreal post-fire salvaged stands How important is biomass burning in Canada to mercury contamination? Dissipation of four forest-use herbicides at high latitudes Spruce beetles and forest ecosystems in south-central Alaska: A review of 30 years of research Successional Changes in Carbon Stocks After Logging and Deforestation for Agriculture in Interior Alaska: Implications for Boreal Climate Feedbacks Early white spruce regeneration treatments increase birch and reduce aspen after 28 years: Toward an integrated management of boreal post-fire salvaged stands Effects of moisture limitation on tree growth in upland and floodplain forest ecosystems in interior Alaska [electronic resource] Regulation of boreal forest understory vegetation: the roles of resources and herbivores Wildfire evacuations in Canada 1980-2007 Knowing a socially sustainable forest when you see one: implications for results-based forestry Plant species diversity on logged versus burned sites in central Alaska Placing Forestry in the Assisted Migration Debate How important is biomass burning in Canada to mercury contamination? Maintaining the role of Canada's forests and peatlands in climate regulation Balancing the Relationship Between Protection and Sustainable Management in Canada's Boreal Forest Evaluating Natural Reserve Design Efficacy in the Canadian Boreal Forest Using Time Series AVHRR Data