This text is ideal for either an ecology course with a strong environmental emphasis or an environmental science course that focuses heavily on ecological principles. The first introductory text to outline the fundamental ecological principles which provide the foundation for understanding environmental issues. A strong framework of applied ecology is used to explore specifics such as habitat fragmentation, acid deposition, and the emergence of new human diseases. *Two new chapters: Wetland Science and Fishery Management *Completely revised chapters on climate, habitat fragmentation, conservation biology, disease, and the future *Further readings-Includes classic papers, conflicting viewpoints, and accessible summaries of related ideas *Web Connections - Text specific website. Includes on-line quizzes, critical thinking questions, links to Web's best ecology sites, and Prentice Hall's syllabus manager *Emphasizes scientific arguments relating to environmental issues vs. environmental activism *Ecology in Action essays-Emphasizes the process of science