Browsing Department of Biology Graduate Theses by Title
Now showing items 21-40 of 331
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Assessing long-term environmental trends in Ontario lakes that support Lake Trout (Salvelinus namaycush)
Oxygenated habitats for Lake Trout (Salvelinus namaycush) are projected to deteriorate with climate warming. However, a paucity of long-term limnological monitoring data impedes the ability to determine if concentrations ... -
Assessing strategies for managing drug resistance in treatment of infectious disease: insights from queueing theory
(2013-07-03)Antimicrobials have been instrumental in the treatment of infectious disease: responsible for worldwide infection control and reductions in disease-induced morbidity, and mortality. However, in every case where new ... -
Assessing the chemical and biological recovery of Killarney Provincial Park lakes from historical acidification
Since the mid 1900s, acidification has impacted water quality and threatened the ecological integrity of thousands of lakes and streams across Eastern North America and Europe. After the implementation of industrial emission ... -
Assessing the Relative Influence of Nitrogen Deposition and Regional Warming on Scaled Chrysophytes in Lakes Downwind of the Athabasca Oil Sands Region, Canada
(2016-04-27)Freshwater systems in Boreal regions are potentially threatened by a number of environmental stressors, such as point and non-point source pollutants from industrial development and climate change. In northeast Alberta, ... -
Assessing the Role of Declining Calcium in Biological Recovery on Zooplankton in Historically Acidified Lakes
(2015-05-28)Throughout much of the 20th century, industrial emissions caused the widespread acidification of thousands of lakes in North America and Europe. Acidification has led to unprecedented damage on zooplankton communities, ... -
Assessing the spatial and temporal patterns of total mercury δ 15N and δ13C in yellow perch and their prey items from a contaminated site, St. Lawrence River, Cornwall, ON
(2007-08-02)As a result of the legacy of industrial contamination over the last century, areas of sediment deposition in the St. Lawrence River at Cornwall, ON, contain high concentrations of mercury (Hg). The popular sport-fish ... -
Assessing the use of Viviparus georgianus snails as a means for biomanipulation of cyanobacterial species Microcystis aeruginosa
Cyanobacterial blooms can produce toxins which can be fatal to organisms, including humans. Biomanipulation of cyanobacterial harmful algal blooms (CHABs) aims to proactively prevent their formation by maintaining continuous ... -
Assessing Thule Inuit impacts on High Arctic lakes and ponds : a paleolimnological approach
(2008-01-03)Until recently it has been widely believed that significant anthropogenic influences on the environment began in Canada following the onset of European colonization. However, our paleolimnological data indicate that ... -
Assessment of Long-Term Changes in Water Quality from Halifax Region Lakes (Nova Scotia, Canada) Using Paleolimnological Techniques
(2009-09-10)The current study developed a paleolimnological approach to assess changes in diatom assemblages (class Bacillariophyceae) from present-day lake sediments in comparison to those deposited before significant human impact ... -
An Assessment of Population Genetic Structure in Guillemots (Cepphus)
Understanding how evolutionary forces shape population genetic structure is a principal goal of evolutionary geneticists. Guillemots (Aves: Charadriiformes: Alcidae: Cepphus) provide useful systems for investigating ... -
Assessment of the Effects of Habitat, Harvest and Community Interactions on the Abundance of Walleye Sander Vitreus in Inland Lakes Throughout Ontario
(2012-09-25)Walleye (Sander vitreus) is an important species to the recreational fishery throughout Ontario. Fish community interactions between walleye and other species are rarely considered when establishing management targets ... -
Autophosphorylation of the Dual-Specificity Calcium-Dependent Protein Kinase RcCDPK1 From Castor Oil Seeds
Phosphoenolpyruvate carboxylase (PEPC) is a tightly-regulated enzyme that plays essential roles in central plant metabolism, particularly in the replenishment of tricarboxylic acid cycle intermediates withdrawn for ... -
Bacterial low temperature survival, ice nucleation proteins and ice-associating polymers
(2010-01-29)Microorganisms have developed ways to preserve cellular functions under low temperature conditions using a variety of biochemical adaptations including the modification of ice formation. In order to conduct a limited survey ... -
The behaviour of largemouth bass in Lake Opinicon, Ontario: A biological perspective for the evaluation of Murphy Bay fish sanctuary
(2010-04-01)This study provides a biological perspective on the potential of using year-round sanctuaries to protect largemouth bass (Micropterus salmoides). Although the Rideau Lakes bass sanctuaries have been present for more than ... -
Behavioural Correlates of Social Dominance in Male Zebra Finches
Illuminating the adaptive nature of animal behaviours is a major goal of evolutionary biology, and the fitness consequences for many behaviours have been well-documented. Animal personality research seeks to achieve this ... -
Biochemical and Molecular Characterization of AtPAP25, a Novel Cell Wall-Localized Purple Acid Phosphatase Isozyme Upregulated by Phosphate-Starved Arabidopsis Thaliana
(2012-09-10)Upregulation of intracellular and secreted acid phosphatases (APases) is a universal response of orthophosphate-starved (-Pi) plants. APases hydrolize Pi from a broad spectrum of phosphomonoesters at an acidic pH. Plant ... -
Biochemical Responses of Arctic Soil Communities to Anthropogenic Stress
(2013-06-04)We are living in the era of climate change which becomes more complicated whenever some new environmental issue emerges only to get linked with this already existing challenge. Engineered nanoparticle (NP) contamination ... -
Biogeography and Diversification of the Andean Seedsnipes (Thinocoridae): An Antarctic Avian Lineage?
(2011-08-18)South America and the Andes harbour a rich biodiversity. High levels of in-situ speciation, survival of relict lineages into modern times, and mixing of biotas (Gondwanian and North American), have been demonstrated to ... -
Biological Impacts and Uses of Black Bass Competitive Fishing Tournaments on Large Lake Systems
(2016-09-29)Recreational fisheries in North America are valued between $47.3 billion and $56.8 billion. Fisheries managers must make strategic decisions based on sound science and knowledge of population ecology, to effectively conserve ... -
Biomanipulation in two Ontario Precambrian Shield lakes: a multi-proxy paleolimnological analysis
(2012-10-18)Food web biomanipulations provide the means to partly control water quality problems (i.e. algal blooms) in lakes by altering internal ecological mechanisms. However biomanipulation mechanisms are complex and the results ...