Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This thesis examines how dissolved organic matter quantity and quality and nutrients influence the flux potential of greenhouse gases (GHG) from sediments collected from streams across southern Ontario as well as Lake Erie. Sediments were collected and incubated in a laboratory setting where headspace gases and interstitial waters were analyzed. Results demonstrated that nutrients (… more Full Text: POTENTIAL FOR GREENHOUSE GAS EMISSIONS FROM SEDIMENTS OF AGRICULTURAL STREAMS AND LAKE ERIE 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: 2016, 2016
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The objective of this thesis was to assess current spatial trends and historic trends in the accumulation of trace metals related to the Athabasca Oil Sands Region (AOSR). The AOSR hosts some of the largest industrial developments in Canada, yet relatively little is known about the transport and fate of trace metal emissions from the region – particularly in the relatively remote areas… more Full Text: AN ASSESSMENT OF SPATIAL TRENDS IN THE ACCUMULATION OF OIL SANDS RELATED METALS IN THE CLEARWATER RIVER VALLEY AND TEMPORAL TRENDS IN SIX NORTHERN SASKATCHEWAN LAKES A Thesis Submitted to the Committee of Graduate Studies In Partial Fulfillment of the …
Year: 2016, 2016
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Phosphorus (P) is an essential macronutrient. In south-central Ontario, foliar P concentrations are low and studies have suggested that P may be limiting forest productivity. Current catchment mass balance estimates however, indicate that P is being retained suggesting that P should not be limiting to tree growth. Phosphorus deposition is measured using bulk deposition collectors, which… more Full Text: Phosphorus deposition in forested watersheds: importance of pollen 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 …
Year: 2015, 2015
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Cuss, Chad Warren, Thesis advisor (ths): Gueguen, Celine, Degree committee member (dgc): Watmough, Shaun, Degree committee member (dgc): McConnell, Sabine, Degree committee member (dgc): Dillon, Peter, Degree granting institution (dgg): Trent University Abstract: <p>Dissolved organic matter (DOM) is a mixture of molecules with dynamic structure and composition that are ubiquitous in aquatic systems. DOM has several important functions in both natural and engineered systems, such as supporting microorganisms, governing the toxicity of metals and other pollutants, and controlling the fate of dissolved carbon. The structure and composition of DOM… more Full Text: Size and fluorescence properties of allochthonous dissolved organic matter: characterization, transformations, and reactivity A dissertation to the Committee on Graduate Studies in partial fulfillment of the requirement for the degree of Doctor of …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Smith, Matthew, Thesis advisor (ths): Wallschlaeger, Dirk, Degree committee member (dgc): Dillon, Peter, Degree committee member (dgc): Belzile, Nelson, Degree committee member (dgc): Gueguen, Celine, Degree granting institution (dgg): Trent University Abstract: <p>Selenide is cited as a geochemically important selenium (Se) species, but it is unknown whether selenide is a stable aqueous ion in natural waters. The feasibility of using anoxic anion exchange chromatography (AEC) coupled to dynamic reaction cell-inductively coupled plasma-mass spectrometry to separate aqueous selenide was investigated with the goal of quantifying this anion to… more Full Text: ANALYSIS AND REACTIONS OF AQUEOUS SELENIDE AND OTHER REDUCED INORGANIC SELENIUM COMPOUNDS UNDER ANOXIC CONDITIONS A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfilment of the Requirements of the Degree of Master of Science in the …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This study presents a detailed assessment of the chemical speciation of aluminum and zinc in three streams of a small, acid-sensitive forested catchment on the southern edge of the Precambrian Shield.</p><p>Speciation analysis was achieved using an in-situ analytical technique known as Diffusive Gradient in Thin film (DGT) which measures labile metals, and a predictive… more Full Text: Speciation of Aluminum and Zinc in Three Streams of a Forested Catchment of the Boreal Zone: Temporal Variations assessed through In situ Monitoring and Geochemical Modeling. A Thesis submitted to the Committee of Graduate Studies in Partial Fulfillment …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Recent declines in growth and condition of Great Lakes' lake whitefish (Coregonus clupeaformis) have been linked to ecosystem-wide changes stemming from the invasion of dreissenid mussels. To test the influence of invasive mussels on this commercially important coregonid species, we collected archived scale samples from ten Great Lake locations and analyzed long-term changes in… more Full Text: Widespread changes in growth, diet and depth distribution of lake whitefish (Coregonus clupeaformis) in the Great Lakes are linked to invasive dreissenid mussels A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the …
