This book is an excellent exposition of the basic models covered in ecology. Each chapter provides full explanations of the derivation, dynamics, and implications of each model with problems and simulation exercises that illustrate the issues. The Populus software is an excellent tool for illustrating quantitative concepts in a non-threatening way to help readers develop an intuitive connection between model behavior and the equations. Integrates simple mathematics into the flow of ecological ideas. Covers demography, population growth, Lotka-Volterra competition, diseases, and more. Ideal for readers interested in ecology, evolution and population genetics.