Search
Skip to Search Results- 19Graduate and Postdoctoral Studies (GPS), Faculty of
- 19Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 4Earth and Atmospheric Sciences, Department of
- 4Earth and Atmospheric Sciences, Department of/Journal Articles (Earth and Atmospheric Sciences)
- 3Biological Sciences, Department of
- 2Biological Sciences, Department of/Journal Articles (Biological Sciences)
-
2008
The overall objective of this study was to measure the major nitrogen pools and fluxes in nutrient- and peat-rich, vegetated marshes and fens surrounding shallow ponds in the Western Boreal Plain (WBP) of Canada. Within the same peatland-pond complex, marshes and fens did not differ from each...
-
Nitrogen Loadings in Stormwater and Snowmelt from Cold-region Urban Catchments in 1991 – 2018 and Prediction for Year 2050
DownloadSpring 2022
Urban stormwater and snowmelt runoff has become a primary source of pollution in receiving water bodies (e.g., rivers, lakes and oceans), causing eutrophication, harmful algae blooms and hypoxia and many other environmental issues. It is therefore imperative to study pollutant loadings from urban...
-
Nitrous Oxide Emission Reduction in an Annual Cropping System as a function of Nitrification Inhibitors and Liquid Manure Injection Timings
DownloadFall 2016
Nitrous oxide (N2O) contributes to global warming and ozone depletion. Two-thirds of the global N2O emissions are derived from agricultural soils receiving manure or fertilizer applications. The goal of this study was to identify and develop management practices that can decrease N2O emissions...
-
Fall 2011
Large polycyclic aromatic nitrogen containing asphaltene model compounds, with molecular weights from 535 to 702 g/mol, were catalytically hydrogenated and hydrodenitrogenated in the presence of a commercial NiMo/γAl2O3 catalyst in a stainless steel batch reactor at 370 °C and 17.9 MPa total...
-
Phytoremediation of Nitrogen Impacted Soil and Groundwater at a Fertilizer Facility in Central Alberta
DownloadFall 2012
In-situ remediation techniques such as phytoremediation have shown promise as economical alternatives for reducing the risk of environmental contaminants at impacted sites. Research trials were initiated to determine the efficacy of phytoremediation for soil and groundwater contaminated with high...
-
Planktonic responses to nitrogen and phosphorus deposition - a natural alpine pond experiment
DownloadFall 2010
Several lines of evidence suggest small alpine lakes and ponds are sensitive to nitrogen deposition. Paleolimnological studies, nutrient bioassays, and mesocosm experiments show the positive effects of nitrogen on aquatic alpine primary producers. In particular, alpine pond ecosystems have been...
-
Recent increases in Arctic freshwater flux affects Labrador Sea convection and Atlantic overturning circulation
Download2016
Chambers, Don, Dixon, Timothy H., Bonin, Jennifer, van den Broeke, M. R., Yang, Qian, Ribergaard, Mads H., Mortensen, John, Myers, Paul G.
The Atlantic Meridional Overturning Circulation (AMOC) is an important component of ocean thermohaline circulation. Melting of Greenland’s ice sheet is freshening the North Atlantic; however, whether the augmented freshwater flux is disrupting the AMOC is unclear. Dense Labrador Sea Water (LSW),...
-
Respiration, Acid/Base, Ammonia and Ionoregulatory Strategies in the Pacific hagfish (Eptatretus stoutii)
DownloadFall 2016
Hagfish feed on putrefied carrion, which poses several environmental challenges to the scavenger including hypoxia (Low PO2), hypercapnia (high PCO2) and high environmental ammonia (HEA). To any other organism, these conditions would be physiologically challenging; however, hagfish seem to have...
-
The effects of soil and plant nutrients on the oviposition preference, larval performance and spatial dynamics of Ceutorhynchus obstrictus and its parasitoids
DownloadFall 2010
The effects of nitrogen and sulfur fertilization on the oviposition, feeding preferences, and larval performance of Ceutorhynchus obstrictus (Marsham) (Coleoptera: Curculionidae) on Brassica napus L. were examined in a series of laboratory experiments. The associations between C. obstrictus...