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Effect of Grasses and Soil Amendments on Soil Aggregates and Aggregate Strength
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Four solum and subsoil materials from Alberta were treated to determine if soil aggregation and aggregate strength could be increased to reduce succeptibility to soil compaction. Each soil was treated...
Effectiveness of Soil Conservation Procedures on Recent Major Pipeline Construction in Western Canada
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The effectiveness of a soil conservation method employed on recent major pipeline construction in Western Canada was investigated. Prior to any major construction activities, topsoil was salvaged over...
Effects of Elemental Sulfur on Soil pH and Growth of Saskatoon Berry (Amelanchier alnifolia) and Beaked Hazelnut (Corylus cornuta) Seedlings
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The land disturbed by open-pit oil sands mining must be restored to support the survival and growth of native boreal plants. Because tailings sand and sodic shale overburden are commonly used as an...
Effects of Fire Severity and Woody Debris on Tree Regeneration for Exploratory Well Pads in Jack Pine (Pinus banksiana) Forests
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This study compares the effects of wildfire and local variation in the amount of residual woody debris on natural regeneration in jack pine on exploratory well pads in Alberta’s boreal forest.
Effects of Narrow Linear Disturbances on Light and Wind Patterns in Fragmented Boreal Forests in Northeastern Alberta
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Forest fragmentation threatens forest biodiversity and ecosystem function. One of the concerns relates to increases in edge effects, which among other things affects the forest microclimate that...
Effects of Natural Land Cover, Anthropogenic Disturbance, Space, and Climate on Oribatid Mite Communities in Canada’s Oil Sands Region
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Soil contains a diverse fauna and microflora that are vital for maintaining healthy soils and their various ecosystem services. Oribatid mites are typically highly abundant arthropods in the soil and...
Effects of Wildfire and Soil Compaction on Recovery of Narrow Linear Disturbances in Upland Mesic Boreal Forests
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Energy exploration has led to fragmentation of habitats worldwide. In boreal forests of Alberta, Canada narrow clear-cut linear disturbances (3–14 m wide) called seismic lines are often the largest...
Elk Winter Food Habits and Forage Quality Along the Eastern Slopes of Alberta (A Review)
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A review of the limited number of studies on elk winter food habits along the Eastern Slopes of Alberta shows that elk prefer grasses and grasslike plants over shrubs. When available, rough fescue (...
Ellen Macdonald
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Chair and Professor Forest Ecology and Conservation
EMEND for Schools: 360 Video and Teaching Resources
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The Emend for Schools: 360° Video EMEND Tour Teachers Resource is a full lesson plan and 360 immersive and interactive video teaching tool, including a teacher lesson plan and student workbook aligned...
Emerging Issues – Land Degradation
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Problems associated with soil degradation have, in some parts of Canada, reached crisis proportions. Combatting these problems is a complex task involving the consideration of social, economic, and...
Enhanced Revegetation and Reclamation of Oil Sands Disturbed Sites Using Actinorhizal and Mycorrhizal Biotechnology
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Preliminary results, after two growth seasons, show promise in the use of pre-inoculated seedlings in enhancing growth and establishment of alders and conifers on oil sands reclamation sites.
Environmenta1 Planning for Rights-of-way
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A recent study (using a 10% stratified random sample) estimated the amount of area physically disturbed by energy related activity, to be 66,576 acres (26,963 ha) for a selective study area...
Environmental and Management Drivers of Carbon Dioxide and Methane Emissions From Actively-Extracted Peatlands in Alberta, Canada
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The installation of drainage ditches and removal of vegetation in preparation for vacuum harvesting alters the carbon dynamics of peatlands. However, we lack the measurements to understand the spatial...
Environmental Fate and Transport of Organic Contaminants in Soils at Waste Disposal Sites
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Current approaches for describing the environmental dynamics of organic constituents in complex waste mixtures are reviewed. Factors controlling equilibrium and nonequilibrium sorption of organic...
Erosion Monitoring on Mountain Foothills Waste Dumps
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The erosion study was designed to examine the effects of the regraded configuration (i.e. slope angle, slope length), waste material characteristics, age since reclamation, amount of precipitation...
Establishment and Vegetation Survey of 16 Pinus banksiana-dominated Permanent Plots for the Athabasca Oil Sands Ecological Monitoring Project in 1981
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16 undisturbed, 5-ha, permanent plots dominated by Pinus banksiana (jack pine) were established along an impingement gradient of atmospheric emissions from oil sands processing plants