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Permanent link (DOI): https://doi.org/10.7939/R38W4T

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Ecological Response of Atmospheric Nitrogen Deposition on Reconstructed Soils in the Athabasca Oil Sands Region Open Access

Descriptions

Other title
Subject/Keyword
Athabasca Oil Sands Region
15N natural abundance
Nitrogen saturation
Boreal forest
Nitrogen cycle
Populus tremuloides Michx.
Pinus banksiana Lamb.
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Hemsley, Tyrel, Lee
Supervisor and department
M. Derek MacKenzie (Department of Renewable Resources)
Sylvie A. Quideau (Department of Renewable Resources)
Examining committee member and department
Sylvie A. Quideau (Department of Renewable Resources)
M. Derek MacKenzie (Department of Renewable Resources)
Alexander P. Wolfe (Department of Earth & Atmospheric Sciences)
Department
Department of Renewable Resources
Specialization
Soil Science
Date accepted
2012-03-21T13:51:26Z
Graduation date
2012-06
Degree
Master of Science
Degree level
Master's
Abstract
Oil and gas extraction in the Athabasca oil sands region has increased anthropogenic nitrogen (N) emissions over the past two decades. This study quantified atmospheric N deposition and assessed the potential implications of increased N deposition in aspen (Populus tremuloides Michx.) and jack pine (Pinus banksiana Lamb.) stands located on reclaimed sites. Nitrogen deposition was significant on these sites, and in all cases was dominated by ammonium. Bulk precipitation was significantly greater than throughfall, which indicates canopy uptake of N in both stand types. In aspen stands, positive relationships were found between ammonium deposition, and N isotope signature in forest floor, foliage, and roots, suggesting that biocycling of N was taking place between soil and plants. However, in pine, the lack of similar relations together with high soil nitrate concentrations indicated that the N cycle was more open, potentially leading to leaching losses.
Language
English
DOI
doi:10.7939/R38W4T
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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