Some 20 papers presented at a symposium at the U. of South Florida, May 1988, review the still-sparse information on evaluating how rich a particular natural habitat is in the numbers of species and their relations to other species. Addressed to researchers and college students in a variety of ecological disciplines, they cover patterns, colonization, succession, resource use, predation, parasitism, disturbance, and a number of applications, such as the design of natural reserves, urban greenspaces, and artificial reefs. Annotation copyright Book News, Inc. Portland, Or.