USGS Bat Population Database for the United States and Trust Territories (BPD) v.1.0

Product Type: 

Data Series

Year: 

2003

Author(s): 

Ellison, L.E., T.J. O'Shea, M.A. Bogan, A.L. Everette, and D.M. Schneider

Suggested Citation: 

Ellison, L.E., T.J. O'Shea, M.A. Bogan, A.L. Everette, and D.M. Schneider. 2003. USGS Bat Population Database for the United States and Trust Territories (BPD) v.1.0. U.S. Geological Survey

From 1994-2001 USGS biologists developed a Bat Population Database (BPD v.1) to synthesize the existing data and publications on bat populations in the United States and Territories. The main objectives of the BPD v.1 were to:

  • test the utility of existing data for estimating trends in bat populations,
  • allow researchers and resource managers access to local historic information that may provide useful comparisons for planning new investigations on bat population trends, and
  • provide a basis for analyzing trends in various populations and species of bats nationwide.

In 1999, working with partners at the National Fish and Wildlife Foundation, Bat Conservation International, Colorado State University, and others, FORT scientists convened a national workshop involving bat specialists and experts in sampling and analysis of wildlife populations to evaluate the current status of bat populations and the methods used to estimate their population trends. The results of that workshop were published in the USGS report “Monitoring trends in bat populations of the United States and territories: problems and prospects.”

The BPD v.1 is a complex relational database system built in Microsoft Access to allow entering and sorting information on counts of bats at colony locations by date across a number of fields, including numerous location attributes, management actions, species, information sources, and other characteristics. The database was used to assess the utility of existing information in the evaluation of population trends in bats. Scientifically sound trend analyses are needed to help focus bat conservation priorities and to test hypotheses about bat population trends. A summary and analysis of the data included in BPD v.1 is documented in “Monitoring trends in bat populations of the United States and territories: problems and prospects.”

BPD v.1 currently exists as a compilation of information that relates primarily to colony size estimates or similar data gathered from published literature, theses and agency reports, and State agency files. The BPD v.1 is updated and current through 2001. The project was developed by Laura E. Ellison, A. Lance Everette, and Diane M. Schneider of the U.S. Geological Survey’s Fort Collins Science Center (FORT), under the direction of FORT scientists Thomas J. O’Shea and Michael A. Bogan.

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