Ecology: Principles and Applications is a comprehensive textbook for A-level students and first-year undergraduates taking courses in biology, geography and Earth sciences, who require an introduction to ecology. Studies of human ecology are integrated into the text, and the links to related disciplines are emphasised. The text begins with the ecology of individual organisms and moves on, through communities and ecosystems, to global considerations of biogeography, co-evolution and conservation. Case histories, historical perspectives, controversial theories and extension material are highlighted throughout the book. The second edition has been brought up to date with current syllabuses by the addition of further material on the key issue of conservation, giving excellent coverage of the principles of conservation and using case studies to provide examples of conservation policies in practice. The authors are experienced teachers of ecology at sixth form and undergraduate level.