GIS Tools for Evaluating the Importance of Areas to Birds and the Thoroughness of Observation Coverage Title Bill Ostrander browncreeper@stny.rr.com MGIS Peer Review September 20, 2011
GIS Tools for Evaluating the Importance of Areas to Birds and the Thoroughness of Observation Coverage Introduction – the problem The Natural Heritage Program Approach The Important Bird Area Program Methods Acquiring data Mapping the bird observation areas Running the tools Valuable Literature Acknowledgements
Introduction
The Important Bird Area Program A Program of BirdLife International http://www.birdlife.org/action/science/sites/index.html Hold significant numbers of one or more globally threatened species Are one of a set of sites that together hold a suite of restricted-range species or biome-restricted species Have exceptionally large numbers of migratory or congregatory species Introduction
Introduction
Acquiring Data http://audubon2.org/cbchist/count_table.html
Acquiring Data
http://www.avianknowledge.net/content/download Acquiring Data
Mapping BOAs
Mapping BOAs
Mapping BOAs
Mapping BOAs
Mapping BOAs
Running the Tools
Running the Tools
Running the Tools
Running the Tools
Running the Tools
Thoroughness of Observation Coverage Example Calculations At Risk Species Common Loon (Gavia immer) [COLO] Migration Season IBA Threshold = 60 Maximum seen in Bird Observation Area = 3 Portion of BOA in Area of Interest = 0.25 Springs that COLO observed in BOA = 4 Springs that BOA was visited = 8 Importance of the Area of Interest to Migrating Common Loons in Spring = 3/60 * 0.25 * 4/8 = 0.00625 Thoroughness of Observation Coverage Time to conduct a point count = 5 minutes Time to travel 250 meters = 3 minutes Duration of Visit to Bird Observation Area = 60 minutes Point Count Equivalent (PCE) = 60/(5+3) Distance in which 95% of birds are counted = 125 meters Portion of BOA that is Thoroughly Covered = (PCE*3.14*(125m)2)/Area of BOA Running the Tools
Most Valuable Literature Burger, M.F. and J.M. Liner, 2005. Important Bird Areas of New York: Habitats Worth Protecting (2nd ed.), Audubon New York, Albany, New York, 352 p. Ralph, C. J., J.R. Sauer, and S. Droege, 1995. Managing and Monitoring Birds Using Point Counts: Standards and Applications, Monitoring Bird Populations by Point Counts, Gen. Tech. Rep. PSW-GTR-149, Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture, Albany, California, pp. 161-168. Literature
Acknowledgements Joseph Bishop New York State Department of Environmental Conservation Tioga County, New York Acknowledgements