Readers are shown evidence of animal adaptation and the complexity of the food chain in Invasive Freshwater Species. Analyses of cases such as the troublesome zebra mollusk illustrate the major impact one unchecked species can have on human life and the environment. Patterns of species introduction and takeover in freshwaters teach students the key details of invasive species and illustrate the impact humans and animals have on each other. Diagrams, Full-Color Photographs, Further Information Section, Glossary, Websites, Index, Sidebars.