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Skip to Search Results- 1Alejandro, Alvarez
- 1Anwar, Taslima
- 1Bandara, Sasiri
- 1Beasse, Mark L
- 1Kristensen, Todd Jay
- 1Poletto, Christina Livia
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Active heterotrophic microbial communities from polar desert soils of the Canadian High Arctic
DownloadFall 2012
Polar warming will lead to increased labile organic carbon in Arctic soils, both from the release of organic carbon stored in permafrost and increased plant production. The impact of increasing organic carbon on Arctic soil microbial community composition and activity is of great interest...
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Fall 2016
The Alaska Highway through Southwestern Yukon is located in the discontinuous permafrost zone with many areas of the highway corridor associated with degrading permafrost. Given the strategic value of the corridor, it is critical to have a clear understanding of permafrost characteristics and...
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Fall 2022
In order to understand permafrost and paleoenvironmental conditions in the Mackenzie Delta Region, permafrost cores were collected in the winter of 2017, near the newly developed Inuvik-Tuktoyaktuk Highway (ITH), NWT, by the NWT Geological Survey, NWT Department of Infrastructure, the University...
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Microbial communities in organic substrates used for oil sands reclamation and their link to boreal seedling growth
DownloadFall 2012
Soil reconstruction in the Athabasca oil sands region utilises forest floor and peat materials as surface organic amendments to help reclaim decommissioned mine sites to upland boreal forests. The objective of this study was to characterize the microbial community in these two organic materials,...
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Postglacial Human and Environmental Landscapes of Northeastern Alberta: An analysis of a late Holocene sediment record from Sharkbite Lake, Alberta
DownloadSpring 2019
Sharkbite Lake lies in northeastern Alberta’s lower Athabasca River Valley, within which lies the modern boundaries of the Mineable Oil Sands Region (MOSR). Much of the palaeoecological research to date has addressed the establishment of the Boreal Forest; however, the late Holocene...
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Records of atmospheric mercury deposition and post-depositional mobility in peat permafrost archives from central and northern Yukon, Canada
DownloadFall 2017
Environmental archives provide a feasible means for studying the biogeochemical cycling of heavy metals including mercury (Hg). Although many temperate peat bogs have been successfully used to reconstruct natural and anthropogenic atmospheric Hg deposition fluxes, northern circumpolar permafrost...
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Study of the Chinese loess and Siberian flood basalts: new global scale insights to the paleoclimate and geomagnetic field changes
DownloadSpring 2017
Paleomagnetism, in conjunction with other earth science methods, studies the behavior of the Earth's magnetic field, the drift of tectonic plate, climate and environmental changes. This thesis implements different applications of paleomagnetism to develop a technique to evaluate age for the...
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The Late Holocene White River Ash East Eruption and Pre-contact Culture Change in Northwest North America
DownloadSpring 2020
The White River Ash East eruption of A.D. 846-848 blanketed portions of Subarctic Yukon and Northwest Territories, Canada in volcanic ash. This dissertation examines impacts of the eruption on pre-contact hunter-gatherer social relationships. The main bodies of data on which interpretations are...