Integration of Spatial and Ecological Data in Evolutionary Studies
Braun, Sarah , Mast, Austin .
A new source of georeferenced invasive exotic plant records and their utility in predicting species distributions.
The Florida Exotic Pest Plant Council maintains a Microsoft Access database for recording element occurrence records for invasive plants throughout Florida. This database is managed by Florida State Universityís Robert K. Godfrey Herbarium and currently holds >5400 records. Records are from parks, reserves, highway right-of-ways, and even peopleís yards. Land managers and veteran observers submit the vast majority of the records and all records are screened before being entered into the database. A few records are also vouchered in herbaria around the state (1).
As part of my Masterís thesis for Florida State University, I developed and implemented a georeferencing protocol for the FLEPPC element occurrence records that relied heavily on the point-radius method for georeferencing (2). In September 2005, two graduate student technicians from Florida State University were hired to georeference the FLEPPC records in accordance with the protocol. This talk will address (1) the results of the georeferencing, with special attention given to the utility of the element occurrence records with reference to general trends in the precision of records, (2) spatial patterns exhibited by the data, (3) data gaps both for particular species and particular regions of Florida, (4) availability of the georeferenced data for use by land managers, researchers, and other interested parties, and (5) the use of a set of the georeferenced records in the species distribution model OM-GARP.
(1) FLEPPC. 2005. Database of Florida's Invasive Species. Florida Exotic Pest Plant Council. Internet:http://www.fleppc.org/database/data_intro.htm
(2) Wieczorek, J. Q. Guo, and R.J. Hijmans. 2004. The point-radius method for georeferencing locality descriptions and calculating associated uncertainty. International Journal of Geographical Information Science. 18:745-767.
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Sarah Braun's website
1 - Florida State University, Department of Biological Sciences, Tallahasse, Florida, 32306-1100, USA
species distribution model
species distribution models.
Presentation Type: Symposium or Colloquium Presentation
Location: Stevens 2/Hilton
Date: Wednesday, July 11th, 2007
Time: 11:30 AM