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Long-term bat abundance in sagebrush steppe

Journal Article · · Scientific Reports
 [1];  [2];  [3];  [4];  [4];  [5];  [6]
  1. Brigham Young Univ., Rexburg, ID (United States). Dept. of Biology; DOE/OSTI
  2. Wastren Advantage Inc., Idaho Falls, ID (United States)
  3. U. S. Bureau of Land Management, Shoshone, ID (United States)
  4. U. S. Bureau of Land Management, Idaho Falls, ID (United States)
  5. Craters of the Moon National Monument and Preserve, Arco, ID (United States)
  6. Temple Univ., Philadelphia, PA (United States). Dept. of Biology
Bats of western North America face many threats, but little is known about current population changes in these mammals. We compiled 283 surveys from 49 hibernacula over 32 years to investigate population changes of Townsend’s big-eared bats (Corynorhinus townsendii townsendii) and western small-footed myotis (Myotis ciliolabrum) in Idaho, USA. This area comprises some of the best bat habitat in the western USA, but is threatened by land-use change. Bats in this area also face invasion by the pathogen causing white-nose syndrome. Little is known about long-term trends of abundance of these two species. In our study, estimated population changes for Townsend’s big-eared bats varied by management area, with relative abundance increasing by 186% and 326% in two management areas, but decreasing 55% in another. For western small-footed myotis, analysis of estimated population trend was complicated by an increase in detection of 141% over winter. After accounting for differences in detection, this species declined region-wide by 63% to winter of 1998–1999. The population fully recovered by 2013–2014, likely because 12 of 23 of its hibernacula were closed to public access from 1994 to 1998. Our data clarify long-term population patterns of two bat species of conservation concern, and provide important baseline understanding of western small-footed myotis prior to the arrival of white-nose syndrome in this area.
Research Organization:
Temple Univ., Philadelphia, PA (United States); Wastren Advantage Inc., Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE); United States Fish and Wildlife Service (USFWS)
Grant/Contract Number:
NE0008477
OSTI ID:
1624414
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 8; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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