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Tuesday, February 7 • 6:00pm - 9:00pm
Poster Display. Roost Site Habitat Selection by Maternity Colonies of Federally Endangered Myotis Sodalis in Bottomland Hardwood Forests

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AUTHORS: Jacquelyn Dearborn, University of Missouri; Elisabeth Webb, USGS Missouri Cooperative Fisheries and Wildlife Research Unit; Sybill Amelon, USFS Northern Research Station; Shauna Marquardt, USFWS Missouri Ecological Services Field Office

ABSTRACT: Within the last century 96% of bottomland hardwood ecosystems in the south-central United States have been converted to other land uses. Previous studies indicated that Indiana bats roost in many tree species typically found in bottomland hardwood ecosystems, however, resource selection by bats can vary depending on geographic location and habitat type. With nearly half of the range-wide Indiana bat population hibernating in Missouri and Illinois, information on how the species selects maternity roost sites in some of the last remaining bottomland hardwood ecosystems in those states can help guide management practices on public lands. We captured and used radio-telemetry to track Indiana bats at Cypress Creek and Mingo National Wildlife Refuges during summer 2015. We tracked 11 female Indiana bats to 16 distinct roost locations, 7 of which were artificial roosts (telephone poles with artificial bark) that refuge biologists had placed on the landscape in 2014. Four available trees were selected for each used tree (N=64) and habitat covariates were measured at both used and available trees. Selection was determined with discrete choice analysis in R using program mlogitBMA. At Cypress Creek, bats strongly selected artificial roosts over natural roosts, while at Mingo, bats selected trees with greater than 25% exfoliating bark. Our results indicate differences in roost site habitat selection parameters between the two refuges. Due to strong selection for artificial roosts at Cypress Creek (an option not present at Mingo), habitat selection differences may have management implications for Indiana bat habitat restoration in bottomland hardwood ecosystems.

Tuesday February 7, 2017 6:00pm - 9:00pm CST
Lancaster Ballroom

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