Browsing by Discipline
Now showing items 21-40 of 71
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The distribution and role of downed woody debris in nutrient retention and cycling during early stand establishment
(2013-02-12)Coarse woody debris (CWD) in boreal ecosystems has been hypothesized to play an important nutritional role following stand-replacing disturbances such as fire or harvest. Sites with shallow soil over bedrock or those with ... -
Ecological niche modelling : salix in Ontario
(2013-04-10)It has long been recognized that organisms exist in environments peculiar to taxa. Climate is thought to be of primary importance in determining the natural geographic distribution of species. Growing concern over climate ... -
Economic analysis of vegetation management alternatives in Ontario
(2014-01-22)Vegetation management practices have become an integral component of forest management. Economics of alternative vegetation management treatments were analyzed in this thesis on the basis of two journal papers. Six research ... -
Ecophysiological responses of black spruce (Picea mariana) seedlings to nutrient supply, N-P-K ratio and photoperiod at current and elevated CO2 concentration
(2012-11-10)The relationship between plant growth and nitrogen supply is frequently used in growth models to predict growth performance under global climate change scenarios. However, the relationship may be changed under elevated ... -
Effects of KNO3 and NaH2PO4 on lipid synthesis and CaCO3 accumulation in pleurochrysis carterae and newly identified algal shell coccolith structure
(2019)Due to the limited energy reserves and the increasing demand for energy, a large number of greenhouse gases such as CO2 have been released to the air. Therefore, there is an urgent need to find new sources of energy and ... -
Effects of nutrient supply, soil temperature and root interactions on morphology, growth, biomass and physiological responses of black spruce and white spruce seedlings to CO2 elevation
(2012-11-10)Changes in atmospheric CO2 concentration ([CO2]) and temperature may influence nutrient resources and how boreal species respond to their environment. The effects of increased [CO2] on plants are generally positive but can ... -
Exploring wild blueberries as a place-based socio-economic development opportunity in Ignace, Ontario
(2014-01-22)Wild blueberries are an important food source in rural communities of Northwestern Ontario, and can be used as a possible alternative to diversify their economic resource base. This study explores the socio-economic ... -
The Fine root dynamics after stand-replacing fire and clearcutting in the boreal forest of central Canada
(2012-11-10)In boreal forest ecosystems, stand age is a key driver of forest ecosystem productivity, carbon storage/sequestration, and other ecosystem functions. The age-related decline of aboveground productivity is well known in ... -
Fine root dynamics for three distinct Northern Ontario forests : a comparison of approaches used to estimate fine root biomass, productivity, and turnover
(2009)There is increasing interest to develop quantitative approaches to carbon accounting and determine carbon sequestration potential at both the site and landscape scales. Currently, our lack of understanding of fine root ... -
Foliar nutrient resorption and litterfall production with stand age, overstory composition, and disturbance origin in boreal forests
(2015-01-13)Nutrient resorption (NuR) prior to developmental senescence allows for nutrient conservation in plants, driven primarily by genetics, development stage, climate and soil fertility, and litterfall is the vector for the ... -
Genetic variation and adaptation of white birch populations across Canada
(2014-01-22)Trees adapt to local climates, however growing concern surrounding climate change has generated predictions suggesting mass extinction or redistribution of taxa across the landscape. A lack of redistribution will result ... -
Growth and photosynthetic responses of white spruce seedlings to levels of trembling aspen and red raspberry cover
(2012-11-10)The effect of competitve species upon crop tree regeneration and growth continues to receive attention from researchers due to the importance of the outcomes. This study stakes a new approach, by examining the combined ... -
Habitat use by woodland caribou in a managed boreal forest landscape
(2012-11-10)Woodland caribou (Rangifer tarandus caribou) populations throughout much of the boreal forest have decreased as a result of changes to forest composition, including an increase in moose (Alces alces) and wolf (Canis lupus) ... -
Heritage Breeds of Livestock in Protected Forest Landscapes: an approach to conserving natural and agricultural diversity
(2012-11-10)In landscapes with a long history of traditional agricultural activity, some protected areas are using heritage breeds of livestock to conserve disturbance-dependent habitats and combat the loss of natural and agricultural ... -
Influence of riparian harvesting on boreal understory vegetation
(2014-01-22)In the boreal forest, understory vegetation accounts for the majority of floristic diversity and affects overstory succession and productivity, nutrient cycling, and wildlife habitat. In riparian forests, understory ... -
The Influence of site type and harvest intensity on understory composition in boreal Picea mariana (Mill.) B.S.P. forest communities in Northwestern Ontario
(2015-08-05)Plant diversity and composition in boreal black spruce understory communities was assessed 15 years after the application of three harvest disturbance treatments on loam, sand and peat site types. The study was carried out ... -
Integrating a tactical harvest-scheduling model with a log sort-yard location model
(2014-01-22)Failure to sort logs prior to their transportation to a mill can result in a loss of value in the forest products supply chain—for unsorted, higher value logs can be used in a low-value product where lower valued logs ... -
Inventorying cutover logging residues: A remote sensing approach
(2012-11-10)The purpose of this study was to quantify the volume of logging residues within forest harvest blocks, using an airborne, remote sensing based method. The objective was to measure the volume using a field technique, and ... -
Investigating productivity and foliar nutrient status in second growth white spruce (Picea glauca) and trembling aspen (Populus tremuloides)
(2012-11-10)This thesis synthesizes two related papers investigating competitive interactions of second growth white spruce (Picea glauca [Moench] Voss) and trembling aspen (Populus tremuloides Michx.) at the Fallingsnow Ecosystem ... -
Investigation of winter habitat selection by woodland caribou in relation to forage abundance and snow accumulation
(2014-01-22)Imprecision and misclassification of land cover types are two issues commonly encountered in habitat selection studies using satellite land cover classifications and telemetry data. Here, the utility of broad land cover ...