Applications of GIS and remote sensing for the characterization of habitat for threatened and endangered species

Geographic Information Systems (GIS) and remote sensing technologies were used to identify and describe potential habitat for three species endemic to the Southwestern United States; the Golden-cheeked Warbler (Dendroica chrysoparia), the Black-capped Vireo (Vireo atricapillus) and the Texas kangaroo rat (Dipodomys elator). For each species, the computerized classification of digital satellite imagery was integrated with ancillary spatial information (e.g. soils, geology and landuse) to construct a data base to be used for ecological evaluation as well as habitat protection and management measures.; For the Golden-cheeked Warbler, 80 meter resolution Landsat Multi-spectral Scanner (MSS) data were classified to identify potential nesting habitat across the breeding range of the species. Additionally, several indices were developed to describe the spatial characteristics of and between patches of identified habitat.; Potential nesting habitat for the Black-capped Vireo was identified on Camp Bullis, Texas. This was accomplished with a combination of classification of Landsat Thematic Mapper data (30 meter resolution) coupled with information about the major geologic formations underlying the study area.; For the Texas kangaroo rat, a map of potential habitat was developed for a portion of their range. The variables employed for the model were: landuse (from Landsat MSS data), major geologic formation and soil association. The model was developed and tested with locations of collection sites for Texas kangaroo rats.