Demonstrates the power of molecular ecology as a research tool in a style ideally suited for an undergraduate audience. Includes the latest methods and concepts, using practical examples, not just theoretical models.. Blends factual content with tools for active learning to encourage the reader to engage with the subject in a hands-on way.. Practical and analytical method boxes, accompanied by essay topics and references to original research papers, take the reader to the frontiers of the subject, and bridge the gap between textbook and primary literature.. New full colour diagrams and many new stunning photographs help students to visualise the key concepts explained in the text.