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18 March 2019 Bat activity and richness in beetle-killed forests in southern British Columbia
Kirstie J. Lawson, Cori L. Lausen, Kristen A. Mancuso, Logan A. Volkmann, TJ Gooliaff, Jenna Hutchen, Kristine J. Teichman, Angelina J. Kelly, Karen E. Hodges
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Abstract

Wildlife species exhibit changes in behavior, population dynamics, and abundance after disturbances to forests. In western North America, large swathes of dead trees have resulted from unusually large outbreaks of bark beetles (Dendroctonus spp.) over recent decades. For bats, these tree mortality events could be either negative or positive, depending on whether cavities and crevices for roosting increase in response to beetle outbreaks and how the food supply is affected. It is therefore important to determine bat presence and activity in areas with many beetle-killed trees. We examined bat species richness in the southern interior of British Columbia, Canada, in areas with light and severe beetle-kill. We identified six bat species from acoustic recorders; the federally endangered little brown myotis (Myotis lucifugus) had the most detections. Although we surveyed stand-level vegetation, we found no systematic difference between areas identified from government aerial surveys as having had high or low beetle-kill within the previous decade. Neither beetle-kill severity nor the fine-scale vegetation that we measured correlated with bat presence or activity. We conclude that bats in this region use beetle-killed forests and that the severity of beetle-killed trees is neither adversely affecting bat presence or activity, nor enabling increased use by bats of affected forest stands in comparison to activity levels found in other high elevation forests.

© 2019 American Society of Mammalogists, www.mammalogy.org
Kirstie J. Lawson, Cori L. Lausen, Kristen A. Mancuso, Logan A. Volkmann, TJ Gooliaff, Jenna Hutchen, Kristine J. Teichman, Angelina J. Kelly, and Karen E. Hodges "Bat activity and richness in beetle-killed forests in southern British Columbia," Journal of Mammalogy 100(2), 510-517, (18 March 2019). https://doi.org/10.1093/jmammal/gyz034
Received: 30 July 2018; Accepted: 31 January 2019; Published: 18 March 2019
KEYWORDS
activity
bark beetle
boreal forest
British Columbia
habitat
Little Brown Myotis
Myotis lucifugus
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