Title: GIS Coordinator
GIS/Remote Sensing Specialist and Illinois Gap Analysis Project Coordinator.
Develop and maintain spatial databases (ArcInfo and ArcView) and habitat associations for vertebrates (mammals, birds, reptiles, and amphibians) in Illinois; develop and assess vertebrate distribution maps and habitat relationship models using vegetation distributions derived from satellite imagery; assist in classification of TM satellite imagery, to community level classification standards.
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|Selected publications: |
Cao, Y., R.E. DeWalt, J.L. Robinson, T. Tweddale, L. Hinz, and M. Pessino. 2013. Using Maxent to model the historic distributions of stonefly species in Illinois streams: The effects of regularization and threshold selections. Ecological Modelling 259: 30-9.
Tweddale, T., G. Krumins, and K. Cummings. 2012. Multi-state Spatial Database to Access Threats to Mussels. INHS Technical Report 2012 (40), 35pp, Prepared for the USFWS, Division of Endangered Species, Region 3, 5600 American Blvd West, Suite 900, Bloomington, MN 55437-1458. Report issued on 12/28/2012
DeWalt, R. E., Y. Cao, T. Tweddale, S.A. Grubbs, L. Hinz, M. Pessino, and J.L. Robinson. 2012. Ohio USA Stoneflies (Insecta, Plecoptera): Species Richness Estimation, Distribution of Functional Niche Traits, Drainage Affiliations, and Relationships to Other States. ZooKeys 178: 1-26.
Luman, Don, T. Tweddale. Assessment and Potential of the 2007 USDA-NASS Cropland Data Layer for Statewide Annual Land Cover Applications. INHS Technical Report 2008 (49). 61pp.
Tweddale, T. The USDA-NASS Cropland Data Layer for Statewide Annual Land Use/Land Cover Applications, Illinois Natural History Survey Reports, Autumn 2008, No. 397.
DeWalt, R. Edward, Y. Cao, T. Tweddale. 2008. Reconstruction of Historical Distributions of Stoneflies (Plecoptera) Using Museum Records. CF: 56th Annual Meeting of the North American Benthological Society (NABS 2008), Salt Lake City, Utah (USA), 25-30 May 2008.
|Professional society involvement and activities: |
Member of the Illinois GIS Association
MS, Natural Resources in Environmental Sciences, University of Illinois, Urbana-Champaign, 2006
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