Population biology has been investigated quantitatively for many decades, resulting in a rich body of scientific literature. However, ecologists have often avoided this literature, deterred by its apparently formidable mathematics. Population Biology: Concepts and Models provides an accessible introduction to the biology and ecology of populations. The author assumes acquaintance with only elementary calculus and uses tutorial explanations where needed, along with real life examples and data. Emphasizing the roles of simple mathematical models in explaining the growth and behavior of populations, Population Biology is valuable to students in population biology, population ecology, mathematical biology and mathematical ecology courses. This new edition has been expanded to include more problems, as well as solutions, and more biological examples. Excel spreadsheets illustrating most of the models in the book are included on an attached CD. Readers can manipulate the spreadsheets to demonstrate mathematical models at their own computers.