Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 77 for “"boreal forest"”.
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DISTRIBUTED ENERGETICS OF BOREAL FOREST SNOWMELT
The energetics of snowmelt under boreal forest canopies in central Saskatchewan were examined with respect to the influence of forest canopy structure on the snow cover depletionrate. The distribution of snow water equivalent was examined prior to melt and during melt in five distinct boreal forest …
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Climate change adaptation and sustainable forest management in the boreal forest
Climate change will pose increasing challenges to forest managers working to achieve sustainable forest management in the boreal forest. A logical starting point for climate change adaptation is to proactively identify management practices and policies that have a higher likelihood of achieving …
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Fine root dynamics in the Boreal Forest of northern Saskatchewan, Canada
… roots (FR) (roots < 2 mm in diameter) in the boreal forests has become a focus of many forest researchers in the past decade in an effort to better understand belowground processes and improve current carbon (C) models to better predict possible C sinks and sources. The objectives of this …
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Characterizing Boreal Forest Fire Disturbance Boundaries Through Space And Time In Ontario
The Ontario boreal forest contains vast natural resources but is increasingly threatened by wildland fires, which are becoming more frequent and affecting larger areas due to climate change. In response, this thesis compares wildland fire boundaries derived from vegetation index slopes with those …
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Clearcut Solutions? An Evaluation of Partial Harvesting in the Black Spruce Boreal Forest
… evaluates partial harvesting in the black spruce boreal forest. Forest management in Ontario is required to emulate natural disturbances, but in regions of the boreal forest where fire cycles are long, regulated even-aged management by clearcutting has truncated forest age-class distributions. …
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Herbivore-plant-soil interactions in the boreal forest : selective winter feeding by spruce grouse
… to spruce litter. In the nutrient limited boreal forest, spruce grouse faecal inputs under feeding trees may locally increase soil nutrient availability and nutrient cycling rates (Chapter 4). The nitrogen content of grouse faeces may account for the relatively high growth rates of feeding …
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Sexual recruitment of trees following fire in the southern mixedwood boreal forest of Canada
… tremuloides Michx., was studied in the mixedwood boreal forest of Saskatchewan, Canada. The main objective of the study was to estimate the recruitment densities of germinants as a function of seedbed type. Field observations indicate that there are significant differences in seedbed frequencies …
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Analyzing variation in snow albedo across spatial scales of observation in the Alaskan boreal forest
… a wildfire. Like the western United States, the boreal forests in Alaska are experiencing an increase in wildfire activity, drastically altering both the regional and global energy balance. After a wildfire, light absorbing particles such as black carbon and woody debris are deposited on the snow …
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Effects of forest fragmentation on the demography of ovenbirds (Seiurus aurocapillus) in the boreal forest
… by commercial harvesting, and in contiguous boreal forest of Saskatchewan. Various survey techniques demonstrated that ovenbirds were less common in small, isolated forest patches in fragmented landscapes relative to contiguous forest. Male ovenbirds in fragmented landscapes (84 to 87% …
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Prediction of Foliar Biochemistry in a Boreal Forest Canopy Using Imaging Spectroscopy and LiDAR Data
… predict foliar macronutrients and pigments for a boreal mixedwood forest composed of black and white spruce, balsam fir, northern white cedar, white birch, and trembling aspen was investigated. Specifically, imaging spectroscopy (IS) and light detection and ranging (LiDAR) are used to model the …
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Fire regime change and the boreal forest carbon cycle from 10,000 years ago to 2100 AD
Boreal forests play an important role in the global carbon cycle, and wildfire is a key control of boreal carbon dynamics. Rapid high latitude climate change will likely alter boreal fire regimes, potentially disrupting the historical role of the biome as a major sink for anthropogenic carbon …
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Drivers of spatial and temporal variability in the fire regime of boreal forest in western Russia
Fire is an integral and major control on forest properties and ecosystem functions within the boreal forest. However, significant spatial and temporal variability in fire regimes occurs across this area that may not current be being encompassed in models and predictions of its future, particularly …
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Community- and species-level consequences of competition in an unproductive environment: an experimental approach using boreal forest understory vegetation
… habitats. The studies were done in a boreal forest understory plant community in the southwestern Yukon. The first study was a traditional neighbour removal experiment. Ten of the most common species were transplanted as seedlings into transects with and without neighbours in a …
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Tree cavity abundance and nest site selection of cavity nesting birds in a natural boreal forest of West Khentey, Mongolia
Höhlenbrütende Vogelarten stellen einen bedeutenden Anteil vieler Waldvogelgemeinschaften. Wegen ihrer engen Bindung an entsprechende Habitatstrukturen sind sie sehr empfindlich gegenüber Veränderungen der Waldstruktur. Daher werden sie als Indikatoren für Habitatqualitäten und Vogeldiversität …
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