Browsing Biology by Subject "Habitats & ecosystems."
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A Little Bat and a Big City: Nocturnal Behavior of the Tricolored Bat (Perimyotis subflavus) Near Indianapolis AirportI captured 16 Perimyotis subflavus on property owned by the Indianapolis International Airport, of those 16 animals I obtained roosting data on all 16 and foraging data on 11 individuals. The goal of this project was to see if a short broad winged bat’s foraging and roosting habits were affected by the fragmentation of habitat due to rapid urbanization. Using radio telemetry to find roosts and to create multi-azimuth triangulation I was able to create data points and place them onto a habitat map inside ArcGIS software. Sampling the size of woodlots available to the bats I was able to see that the bats only roosted in larger woodlots on the property. Using Euclidian distance analysis I was able to compare the distance of data points both with roosting and foraging from habitat classes to see that this species roosts in woodlots next to old fields and maintained habitats, does not roost in woodlots near commercial areas, and prefers foraging in forests, agricultural fields, maintained habitats, and old fields.
Impact of Forest Management Techniques on Bats with a Focus on the Endangered Indiana Myotis (Myotis Sodalis)Understanding how forest management practices impact bats is important for maintaining a diverse bat community; rare species, especially the federally endangered Indiana myotis (Myotis sodalis) need special consideration. Bats play an important role in the environment because they prey on insects, especially pest species, and conservation of viable foraging and roosting habitats is critical. Positive and negative aspects of the implementation of forest management techniques are discussed for each bat species. Bats were sampled using mist nets at four locations in Morgan-Monroe and five locations in Yellowwood State Forests twice during each summer 2006-2008. Netting locations were adjacent to or in forest stands scheduled for experimental manipulations following conclusion of netting in 2008. This effort produced 342 bats. These data provide a baseline to understand how bats are affected by long-term forest manipulations. An acoustical survey was conducted in summer 2007 to determine forest habitats where bat species occur. Anabat II bat detectors in four habitat types,--interior forest, canopy gap, forest edge, and corridors--produced calls from 7 species, a total of 3113 calls (842 corridor, 681 forest edge, 1075 canopy gap, and 515 forest interior) during 337 sample nights. Occupancy of each habitat by each species was determined; canopy gaps were occupied most, followed by forest edge, corridors, and interior forest. These data are used to predict the response of bats to forest manipulations.