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Permanent link (DOI): https://doi.org/10.7939/R3CN6ZC9Z

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Wolf-Moose Spatial Dynamics in Alberta’s Athabasca Oil Sands Region Open Access

Descriptions

Other title
Subject/Keyword
refugia
moose
wolf
landscape ecology
predation
oil sands
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Neilson, Eric W
Supervisor and department
Boutin, Stan (Biological Sciences)
Examining committee member and department
Boyce, Mark (Biological Sciences)
Lewis, Mark (Biological Sciences)
Bayne, Erin (Biological Sciences)
Vander Wal, Eric (Department of Biology, Memorial University of Newfoundland)
Department
Department of Biological Sciences
Specialization
Ecology
Date accepted
2017-09-26T10:16:20Z
Graduation date
2017-11:Fall 2017
Degree
Doctor of Philosophy
Degree level
Doctoral
Abstract
The degree to which predator and prey distributions overlap in space influences the probability of encounters between predator and prey, kills of prey, and consequently, how each species’ abundance varies in time and in space. Predator and prey attempt to increase or decrease overlap respectively through movement and habitat selection, processes that are sensitive to habitat heterogeneity. If predator and prey respond differently to novel habitat heterogeneity such as a zone of influence in and around human disturbance, it may provide prey with a refuge or facilitate predator hunting efficiency. Alberta’s Athabasca oils sands region (AOSR) is a region of boreal forest with extensive mining developments and overlapping wolf (Canis lupus) and moose (Alces alces) populations. To assess whether the human disturbance in AOSR has affected wolf-moose spatial overlap, I quantified the degree to which both wolves and moose avoid human disturbance across my study area. I hypothesized that wolves would avoid areas disturbed by human developments and activity, and that this avoidance would be used by moose as a refuge. Wolves and moose both used and selected areas near human disturbance such that no refugia for moose was available due to human disturbance. Further, I found that a higher proportion of moose were killed as the distance to oil sands mines decreased. I also found that wolves selected to move on linear features associated with oil extraction and such selection facilitated faster movement. Wolves did select to move farther away from human habitation and oil sands facilities, but only during the day. There was no relationship between wolf movement speed and proximity to industrial facilities, urban area or oil sands mines. Moose cows, particularly those with calves, strongly avoided areas within their home ranges with a high intensity of wolf use. In addition, moose altered their behaviour both within and between individuals as a function of the local intensity of use by wolves, but only with respect to natural features. Rivers and streams were avoided in areas with more wolf use. Overall, I conclude that human disturbance in AOSR has not generated prey refugia for moose, rather it has provided a marginal advantage for wolves while hunting in proximity to mines.
Language
English
DOI
doi:10.7939/R3CN6ZC9Z
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication
Neilson, E. W., and S. Boutin. 2017. Human disturbance alters the predation rate of moose in the Athabasca oil sands. Ecosphere 8(8):e01913. 10.1002/ecs2.1913.

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