Provides a complete one-volume guide to the core definitions and issues associated with pure and applied ecology. This encyclopedia is neither a short-entry dictionary nor a long-essay encyclopedia, but lies somewhere in between with a mixture of short-entry definitions and long-entry essays reviewing the present state of knowledge across a huge range of topics and allowing any particular subject to be accessed to varying levels of detail: the longer entries provide general overviews of subjects, whilst the short definitions provide specific details on more specialized areas.