The Role of Human Altered Landscapes and Predators in the Spatial Overlap Between Moose, Wolves, and Endangered Caribou
Degree: Master of Science Abstract: Human altered landscapes can cause the endangerment or extinction of a species, not only by a direct loss of habitat but by altering predator-prey relationships. Predators can drive prey to extinction when the density of the predator becomes subsidized by another...
Main Author: | |
---|---|
Other Authors: | , , , |
Format: | Thesis |
Language: | English |
Published: |
University of Alberta. Department of Biological Sciences.
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/10402/era.39808 |
id |
fttriple:oai:gotriple.eu:10402/era.39808 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:10402/era.39808 2023-05-15T13:13:41+02:00 The Role of Human Altered Landscapes and Predators in the Spatial Overlap Between Moose, Wolves, and Endangered Caribou Anderson, Meghan Samantha Stan Boutin (Biological Sciences) Jessamyn Manson (Biological Sciences) Erin Bayne (Biological Sciences) Andrew Derocher (Biological Sciences) 2014-09-29 http://hdl.handle.net/10402/era.39808 en eng University of Alberta. Department of Biological Sciences. 10402/era.39808 http://hdl.handle.net/10402/era.39808 undefined ERA : Education and Research Archive envir geo Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2014 fttriple 2023-01-22T17:06:13Z Degree: Master of Science Abstract: Human altered landscapes can cause the endangerment or extinction of a species, not only by a direct loss of habitat but by altering predator-prey relationships. Predators can drive prey to extinction when the density of the predator becomes subsidized by another abundant, alternate prey. Such indirect species interactions are termed “apparent competition” and are increasingly being linked to species endangerment. The mechanism behind apparent competition may be differences between the prey species in reproductive success, niche overlap, or differences in ability to escape predation. This study focused on a case of apparent competition between moose (Alces alces), wolves (Canis lupus), and endangered mountain caribou (Rangifer tarandus caribou) in the Columbia Mountains of British Columbia. The southern mountain population of caribou escape predation by residing at high elevations most of the year. However, when moose move into caribou habitat in the summer wolves often follow, exposing caribou to greater predation risk. I examined two hypotheses why moose move into caribou habitat in the summer. First, I examined the hypothesis that human-caused early-seral vegetation available in mountain caribou summer habitat attracts moose. I examined this hypothesis using four predictions: i) moose forage will be more abundant in high-elevation cutblocks compared to other habitats at high and low elevations, ii) moose preferentially select for cutblocks at high elevation relative to low-elevation cutblocks, iii) when moose are at high elevations they will be closer to cutblocks than would be expected by random, iv) the amount of cutblocks at high elevations in a moose home range will be positively related to the amount of time moose spend at high elevations. I found my second prediction was supported; moose did select for cutblocks at high elevations. However, the remaining predictions were not supported: moose forage was not more abundant in high-elevation cutblocks, moose at high ... Thesis Alces alces Canis lupus Rangifer tarandus Unknown Columbia Mountains ENVELOPE(-63.852,-63.852,-70.197,-70.197) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
envir geo |
spellingShingle |
envir geo Anderson, Meghan Samantha The Role of Human Altered Landscapes and Predators in the Spatial Overlap Between Moose, Wolves, and Endangered Caribou |
topic_facet |
envir geo |
description |
Degree: Master of Science Abstract: Human altered landscapes can cause the endangerment or extinction of a species, not only by a direct loss of habitat but by altering predator-prey relationships. Predators can drive prey to extinction when the density of the predator becomes subsidized by another abundant, alternate prey. Such indirect species interactions are termed “apparent competition” and are increasingly being linked to species endangerment. The mechanism behind apparent competition may be differences between the prey species in reproductive success, niche overlap, or differences in ability to escape predation. This study focused on a case of apparent competition between moose (Alces alces), wolves (Canis lupus), and endangered mountain caribou (Rangifer tarandus caribou) in the Columbia Mountains of British Columbia. The southern mountain population of caribou escape predation by residing at high elevations most of the year. However, when moose move into caribou habitat in the summer wolves often follow, exposing caribou to greater predation risk. I examined two hypotheses why moose move into caribou habitat in the summer. First, I examined the hypothesis that human-caused early-seral vegetation available in mountain caribou summer habitat attracts moose. I examined this hypothesis using four predictions: i) moose forage will be more abundant in high-elevation cutblocks compared to other habitats at high and low elevations, ii) moose preferentially select for cutblocks at high elevation relative to low-elevation cutblocks, iii) when moose are at high elevations they will be closer to cutblocks than would be expected by random, iv) the amount of cutblocks at high elevations in a moose home range will be positively related to the amount of time moose spend at high elevations. I found my second prediction was supported; moose did select for cutblocks at high elevations. However, the remaining predictions were not supported: moose forage was not more abundant in high-elevation cutblocks, moose at high ... |
author2 |
Stan Boutin (Biological Sciences) Jessamyn Manson (Biological Sciences) Erin Bayne (Biological Sciences) Andrew Derocher (Biological Sciences) |
format |
Thesis |
author |
Anderson, Meghan Samantha |
author_facet |
Anderson, Meghan Samantha |
author_sort |
Anderson, Meghan Samantha |
title |
The Role of Human Altered Landscapes and Predators in the Spatial Overlap Between Moose, Wolves, and Endangered Caribou |
title_short |
The Role of Human Altered Landscapes and Predators in the Spatial Overlap Between Moose, Wolves, and Endangered Caribou |
title_full |
The Role of Human Altered Landscapes and Predators in the Spatial Overlap Between Moose, Wolves, and Endangered Caribou |
title_fullStr |
The Role of Human Altered Landscapes and Predators in the Spatial Overlap Between Moose, Wolves, and Endangered Caribou |
title_full_unstemmed |
The Role of Human Altered Landscapes and Predators in the Spatial Overlap Between Moose, Wolves, and Endangered Caribou |
title_sort |
role of human altered landscapes and predators in the spatial overlap between moose, wolves, and endangered caribou |
publisher |
University of Alberta. Department of Biological Sciences. |
publishDate |
2014 |
url |
http://hdl.handle.net/10402/era.39808 |
long_lat |
ENVELOPE(-63.852,-63.852,-70.197,-70.197) |
geographic |
Columbia Mountains |
geographic_facet |
Columbia Mountains |
genre |
Alces alces Canis lupus Rangifer tarandus |
genre_facet |
Alces alces Canis lupus Rangifer tarandus |
op_source |
ERA : Education and Research Archive |
op_relation |
10402/era.39808 http://hdl.handle.net/10402/era.39808 |
op_rights |
undefined |
_version_ |
1766259913970941952 |