- About AL
- Research at AL
- Aquatic Ecology
- Behavioral and Evolutionary Ecology
- Conservation & Restoration Ecology
- Landscape Ecology
- Biologically-Optimized Environmental Classification of Maryland Streams
- Plant Community Response to Changes in Water
- Extinction Risk of the Delmarva Fox Squirrel
- Potomac Initiative
- Quantifying Feedbacks in Desert Vegetation
- Remote Sensing and Forest Disturbance
- Predicting Vulnerability to Sea Level Rise
- Landscape Controls on Seasonal Timing and Growing Season Length
- Watershed Hydrology and Biogeochemistry
- Seminar Series
- Chesapeake Watershed CESU
- Central Appalachians Stable Isotope Facility
- Citation Classics from AL
Bat Inventories of the National Capital Region Parks
This project, funded by the National Park Service, is aimed at developing an inventory of bat communities within 11 National Park Service units within Maryland, West Virginia, and Virginia. The project is part of the NPS Inventory and Monitoring Program developed to establish baseline inventories of natural resources within parks and monitor long term ecosystem health.
Mist nets, harp traps, and Anabat II bat detectors were used in fields, forests, riparian zones, and caves. Efforts included 365 mist net/harp trap nights at 74 locations and 362 locations monitoried with bat detectors. We captured 383 bats representing 6 different species. Bat calls were also collected and analyzed, which identified 7 species. Relative frequencies of some bat species varied according to park land cover, surrounding land use, and overlap of geographic ranges and park boundaries.
- NCR National Parks contain habitat suitable for most bat species in the Mid-Atlantic region.
- Reproduction and recruitment occur at most NCR National Parks, but vary among species and parks.
- Northern myotis (Myotis septentrionalis), and to a lesser extent, little brown bats (M. lucifugus) were not as prevalent in urban parks, which may be a result of forest fragmentation or a consequence of surrounding development.
- Acoustic monitoring consistently detected all species captured in mist nets and species that were not captured, therefore providing a more complete documentation of bat communities.
To Learn More:
- Map of NPS Sites Sampled in 2003 and 2004
- Poster Presentation at March 2005 George Wright Society Biennial Conference on Parks, Protected Areas, and Cultural Sites (pdf)
Future Work :
- We will be monitoring seasonal bat migration at Assateague Island National Seashore, Maryland.
- Several rare, threatened, and endangered bat species use abandoned coal mines at New River Gorge National River. We will assess extent of mine use during the fall swarm.
Dr. J. Edward Gates