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Why did the chickadee cross the road: Effects of linear habitat gaps on the movements of black-capped chickadees
Digital Document
Abstract |
Abstract
I present a novel approach utilizing radio frequency identification (RFID) birdfeeders, coupled with playback experiments, to investigate the gap-crossing decisions of black-capped chickadees (Poecile atricapillus). Results from my RFID experiments revealed that the best predictors of gap-crossing behaviors were gap-distance, and vegetation density. Birds were less likely to cross as gap distance increased. As the amount of vegetation within gaps increased, birds were more likely to cross. Playback experiments showed a decrease in gap-crossing behaviour after the RFID sampling period. Because birdfeeders were put out during this time, decreases in gap-crossing propensity suggests that birds may be engaging in a tradeoff between energy reserves and risk taking. Results from both experiments confirm that gaps do restrict movements of wintering black-capped chickadees. I recommend the primary way to increase connectivity for birds in fragmented habitats is to reduce the distance across gaps. Furthermore, increasing vegetation within gaps may also increase connectivity. |
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Persons |
Persons
Author (aut): Bailey, Jacob Mackenzie
Thesis advisor (ths): Otter, Ken A.
Degree committee member (dgc): Reudink, Matthew
Degree committee member (dgc): Johnson, Christopher Jack
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DOI
https://doi.org/10.24124/2017/58805
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Degree granting institution (dgg): University of Northern British Columbia
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Keywords
chickadees
black-capped chickadees
habitat
gap-crossing
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1 online resource (xii, 64 pages)
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unbc_58805.pdf3.63 MB
7797-Extracted Text.txt122.91 KB
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English
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Why did the chickadee cross the road
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3809770
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