Dr. Donald DeAngelis is a Senior Scientist with the U. S. Geological Survey and an adjunct professor at the University of Miami. He is a theoretical and mathematical biologist specializing in modeling complex ecological and biological systems, and has over 40 years of experience in areas of mathematics, such as partial differential equations, as well as in computer simulations. In particular, Dr. DeAngelis helped pioneer the use of agent-based modeling (ABM) in ecology, starting in the 1970s, and has both applied ABMs to several populations and written a number of review papers on ABM and computer simulation modeling. He has working experience in the following areas; theoretical ecology, ecosystem ecology, population ecology, community ecology, landscape ecology, mathematical modeling, computer simulations, some areas of developmental biology. He has taught population, ecosystem, and spatial ecology, and is coordinator of the USGS’s Across Trophic Level System Simulation (ATLSS) Program, a multi-project, multi-investigator program with the objective of providing simulation models to assist Everglades restoration.