Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Ahee, Jordan, Thesis advisor (ths): Dorken, Marcel E, Degree committee member (dgc): Freeland, Joanna R, Degree committee member (dgc): Burness, Gary, Degree committee member (dgc): Pond, Bruce, Degree granting institution (dgg): Trent University Abstract: <p>Natural populations of flowering plants rarely have perfectly uniform distributions, so trends in pollen dispersal should affect the size of the pollination neighbourhood and influence mating opportunities. Here I used spatial analysis to determine the size of the pollination neighbourhood in a stand of the herbaceous, wind-pollinated plant (<italic>Typha latifolia</italic>;… more Full Text: THE SPATIAL DYNAMICS OF WIND POLLINATION IN BROADLEAF CATTAIL (TYPHA LATIFOLIA): A NEW METHOD TO INFER SPATIAL PATTERNS OF POLLEN DISPERSAL A Thesis Submitted to the Committee on Graduate Studies In Partial Fulfillment of the Requirements for the Degree …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Nitrogen is a major constituent of agricultural fertilizers, and nitrogen inputs to stream water via runoff and groundwater lead to a variety of negative environmental impacts. In order to quantify the movement of nitrogen through aquatic food webs, fourteen streams with varying land uses across South-Central Ontario were sampled for two species of fish, freshwater mussels, and water for… more Full Text: CARBON AND NITROGEN ISOTOPE CHANGES IN STREAMS ALONG AN AGRICULTURAL GRADIENT A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Selenium is an essential trace nutrient to many organisms, yet in high concentrations it is toxic. Organic selenium is more bioavailable to aquatic biota than inorganic selenium, but is usually found in much lower concentrations. Algae are known to biotransform inorganic selenium into several organo-selenium compounds, but it is unknown whether any of these bioaccumulate in the food… more Full Text: Purification and Identification of Selenium-containing C-phycocyanin from Spirulina: Implications for Bioaccumulation and Ecotoxicity A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements of the Degree of …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Stormwater ponds (SWPs) are a common feature in new urban developments where they are designed to minimize runoff peaks from impervious surfaces and retain particulate matter. As a consequence, SWPs can be efficient at retaining particle-bound nutrients, but may be less efficient at retaining nutrients that are present primarily in the dissolved form, like nitrogen (N). However, the… more Full Text: Seasonal variation in nutrient and particulate inputs and outputs at an urban stormwater pond in Peterborough, Ontario A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The typical contrast mechanism employed in multimodal CARS microscopy involves the use of other nonlinear imaging modalities such as two-photon excitation fluorescence (TPEF) microscopy and second harmonic generation (SHG) microscopy to produce a molecule-specific pseudocolor image. In this work, I explore the use of unsupervised multivariate statistical analysis tools such as Principal… more Full Text: “Multimodal Contrast” from the Multivariate Analysis of Hyperspectral CARS Images A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Art and Science …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This thesis focuses on the design of a modelling framework consisting of loose-coupling of a sequence of spatial and process models and procedures necessary to predict future flood events for the years 2030 and 2050 in Tabasco Mexico. Temperature and precipitation data from the Hadley Centers Coupled Model (HadCM3), for those future years were downscaled using the Statistical Downscaling… more Full Text: ADAPT: AN AUTOMATED DECISION SUPPORT TOOL FOR ADAPTATION TO CLIMATE CHANGE-DRIVEN FLOODS PREDICTED FROM A MULTISCALE AND MULTI-MODEL FRAMEWORK Predicting flood extents in Tabasco Mexico A Thesis Submitted to the Committee on Graduate Studies in Partial …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>In this study, I investigate the effects of nitrogen (N) and phosphorus (P) on the nutritional stoichiometry and growth of filamentous green algae of the family Zygnemataceae in situ and ex situ. I found a mean of Carbon (C):N:P ratio of 1308:66:1 for populations growing in the Kawartha Lakes of southern Ontario during the summer of 2012. FGA stoichiometry was variable, with much of the… more Full Text: Nutritional stoichiometry and growth of filamentous green algae (Family Zygnemataceae) in response to variable nutrient supply A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): McInnes, Mark Andrew, Thesis advisor (ths): Ellis, David A, Degree committee member (dgc): Thompson, Matthew, Degree committee member (dgc): Gueguen, Celine, Degree committee member (dgc): Stock, Naomi, Degree granting institution (dgg): Trent University Abstract: <p>Perfluorinated carboxylic acids (PFCAs) are anthropogenic environmentally ubiquitous surfactants that tend to concentrate on water surfaces. This investigation looked at the effect of simulated rain on the atmospheric concentration of a suite of PFCAs (C2 - C12) above the bulk water system. Increased air concentrations of all PFCAs were detected during simulated rain events. Long chain… more Full Text: The Effect of Water Surface Simulated Rain Drop Impacts on Water to Air Chemical Transfers of Perfluorinated Carboxylic Acids (PFCAs) A thesis submitted to the Committee on Graduate Studies in partial fulfillment of the requirements for the Degree of …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Caribou experience direct and indirect negative effects of harassment from biting flies, influencing behavior and activity on several spatial and temporal scales. I used systematic insect collection surveys during the summers of 2011 and 2012 to examine the spatial and temporal distributions of black flies (Simuliidae), mosquitoes (Culicidae), and deer flies and horse flies (Tabanidae)… more Full Text: ECTOPARASITIC INFLUENCES OF DIPTERA ON THE ACTIVITY AND BEHAVIOUR OF WOODLAND CARIBOU (RANGIFER TARANDUS) IN A MANAGED BOREAL FOREST LANDSCAPE IN NORTHERN ONTARIO A Thesis Submitted to the Committee on Graduate Studies In Partial Fulfillment of the …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p><bold>Fractionation of mercury isotopes in an aqueous environment: Chemical Oxidation</bold></p><p><italic>Dimitri Stathopoulos</italic></p><p>The study of fractionation patterns for the stable isotopes of mercury is a growing field. The potential for stable isotopes to trace mercury through the environment from pollution sources to sinks… more Full Text: FRACTIONATION OF MERCURY ISOTOPES IN AN AQUEOUS ENVIRONMENT: CHEMICAL OXIDATION A Thesis Submitted to the Committee on Graduate Studies in Partial fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Ugray, Lisa Madeleine, Thesis advisor (ths): Shiell, Ralph C, Degree committee member (dgc): Shiell, Ralph C, Degree committee member (dgc): Slepkov, Aaron, Degree committee member (dgc): Gaspari, Franco, Degree granting institution (dgg): Trent University Abstract: <p>This thesis is divided into two parts, each of which supports constructing and using a lithium magneto-optical trap for cold collision studies:</p><p>Part I</p><p>One outgoing channel of interest from cold collisions is the production of ion pairs. We describe an effective method for calculating bound-to-continuum cross-sections for charged binary systems by… more Full Text: Heavy Rydberg Photo-dissociation Cross-section Calculations and Experimental Progress Towards Cold Collisions in Lithium TRENT UNIVERSITY Peterborough, Ontario, Canada c 2013 Lisa Madeleine Ugray, some rights reserved. This work is released under a …
Year: 2013, 2013
Member of: Trent University Graduate Thesis Collection
Abstract: <p>A novel passive sampler for mercury monitoring was prepared using organosilica sol-gel materials. It comprises a binding layer with thiol groups for mercury complexation and a porous diffusive layer through which mercury can diffuse and arrive at the binding layer. Our study demonstrated that this new sampler follows the principle of passive sampling. The mass of mercury accumulated in… more Full Text: NOVEL SILICA SOL-GEL PASSIVE SAMPLER FOR MERCURY MONITORING IN AQUEOUS SYSTEMS A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT …
Year: 2013, 2013
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Bedard, K. ottO, Thesis advisor (ths): McKenna-Neuman, Cheryl, Degree committee member (dgc): Cogley, Graham, Degree committee member (dgc): Ponce-Hernandez, Raul, Degree committee member (dgc): Pond, Bruce, Degree granting institution (dgg): Trent University Abstract: <p>A wind tunnel study was conducted to investigate aeolian impact ripples in sand beds of varied texture from coarsely skewed to bimodal. Experimental data is lacking for aeolian megaripples, particularly in considering the influence of wind speed on ripple morphometrics. Additionally, the modelling community requires experimental data for model validation and calibration.</p><p… more Full Text: Aeolian Impact Ripples in Sand Beds of Varied Texture A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science TRENT UNIVERSITY Peterborough, …
Year: 2013, 2013
Member of: Trent University Graduate Thesis Collection
Abstract: <p>In the past few years there has been increasing attention paid to the influence of the motor system on numerical cognition. A 2010 study by Domahs, Moeller, Huber, Willmes and Nuerk tested German and Chinese university students. Number processing time was influenced by cross cultural differences in finger counting habits</p><p>This thesis replicated and elaborated on the… more Full Text: Finger-Counting Habits and Number Processing in Canadian and Chinese University Students A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2013, 2013
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Silver nanoparticles (nAg) are the largest and fastest growing class of nanomaterials, and are a concern when released into aquatic environments even at low μg L<super>-1</super. levels. Measurement at environmental levels requires extremely sensitive instrumentation, therefore this research developed two passive samplers to track the the concentration of nAg and… more Full Text: The Development and Use of Passive Samplers for Monitoring Dissolved and Nanoparticulate Silver in the Aquatic Environment A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of …
Year: 2013, 2013
Member of: Trent University Graduate Thesis Collection
Abstract: <p>I implemented three hayfield management regimens in southern Ontario (a typical schedule at the farmer`s discretion, a delayed first harvest after July 14, and an early first harvest before June 1 with 65 days before second harvest), and evaluated the costs/benefits to farmers regarding hay quality and feasibility, and to Bobolinks (Dolichonyx oryzivorus) regarding reproductive activity… more Full Text: EVALUATION OF HAYFIELD MANAGEMENT STRATEGIES AND BOBOLINK TERRITORIAL HABITAT IN SOUTHERN ONTARIO A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts …
Year: 2013, 2013
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Changes in climate and land-use practices are leading to higher peak flows and increased transport capacity of channel substrate. Semi-alluvial streams underlain by bedrock or clay were examined to understand the potential impacts of alluvium loss on the biological community and overall productive capacity of semi-alluvial rivers. More specifically, this research investigates the… more Full Text: PRODUCTIVE CAPACITY OF SEMI-ALLUVIAL STREAMS IN ONTARIO: THE IMPORTANCE OF ALLUVIAL MATERIAL FOR FISH, BENTHIC INVERTEBRATES, PERIPHYTON AND ORGANIC MATTER A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements …
Year: 2013, 2013
Member of: Trent University Graduate Thesis Collection
Abstract: <p>My study was primarily focused on the comparison of life history traits between stocked American eel and their naturally recruited conspecifics in Lake Ontario and the upper St. Lawrence River (USLR/LO). I found that stocked eels experienced faster annual growth than their naturally recruited conspecifics and were comprised of a greater proportion of males. These findings indicate that… more Full Text: THE LIFE HISTORY STRATEGY, GROWTH, BODY CONDITION, AND DIET OF STOCKED AMERICAN EEL (Anguilla rostrata) IN THE UPPER ST. LAWRENCE RIVER AND LAKE ONTARIO TRENT UNIVERSITY Peterborough, Ontario, Canada © Copyright by Joshua Alexander Stacey 2013 …
Year: 2013, 2013
Member of: Trent University Graduate Thesis Collection
Abstract: <p>I investigated biodiversity of birds and vegetation associations along the boreal-tundra ecotone in Ivvavik National Park, Yukon Territory, and breeding adaptations used by American Robins (Turdus migratorius) at high latitudes. Twenty bird species were detected over three years using point-count surveys. Densities of American Robin, Dark-eyed Juncos (Junco hyemalis), and Yellow-rumped… more Full Text: HABITAT SELECTION AND LIFE-HISTORY TRAITS OF BREEDING BIRDS IN THE BOREAL-TUNDRA ECOTONE, WITH SPECIAL ATTENTION TO THE AMERICAN ROBIN (TURDUS MIGRATORIUS) A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements …
Year: 2013, 2013
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The Serial Discontinuity Concept describes the downstream recovery of key biophysical variables below an impoundment. With the proliferation of hydropower dams to meet increasing societal demands, further refinement and understanding of the Serial Discontinuity Concept is needed to accurately predict downstream impacts and ensure the proper management of rivers. In this study, I examine… more Full Text: Longitudinal Trends of Benthic Invertebrates in Regulated Rivers: A Test of the Serial Discontinuity Concept A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the …
