A Digitized Biotic Community Map for Plotting and Comparing North American Plant and Animal Distributions
An ecologically based classification system, when accompanied by digitized biotic community maps, has been shown to be useful for plotting and assessing plant and animal affinities in the American Southwest and northwestern Mexico.
Brown, D.E., T.C. Brennan, and P.J. Unmack. 2007. A digitized biotic community map for plotting and comparing North American plant and animal distributions. CANOTIA 3(1):1-12.