In this volume, the authors discuss what practical contributions ecology can and can't make in applied science and environmental problem solving. In the first section, they discuss conceptual problems that have often prevented the formulation and evaluation of powerful, precise, general theories, explain why island biogeography is still beset with controversy and examine the ways that science is value laden. In the second section, they describe how ecology can give us specific answers to practical environmental questions posed in individual case studies, and argue for a new way to look at scientific error. A case study using the Florida panther is examined in the light of these findings.

We conceived the idea for this book after teaching a graduate seminar on 'Habitat Complexity' at The University of South Florida. Discussions during the seminar led us to conclude that similar goals were to be found in studies of the topic that spanned the breadth of ecological research. Yet, the exact meaning of 'habitat structure', and the way in which it was measured, seemed to differ widely among subdisciplines. Our own research, which involves several sorts of ecology, convinced us that the differences among subdisciplines were indeed real ones, and that they did inhibit communica tion. We decided that interchange of ideas among researchers working in marine ecology, plant-animal interactions, physiological ecology, and other more-or-less independent fields would be worthwhile, in that it might lead to useful generalizations about 'habitat structure'. To foster this interchange of ideas. we organized a symposium to attract researchers working with a wide variety of organisms living in many habitats, but united in their interest in the topic of 'habitat structure'. The symposium was held at The University of South Florida's Chinsegut Hill Conference Center, in May. 1988. We asked participants to think about 'habitat structure' in new ways; to synthesize important, but fragmented, information; and. perhaps. to consider ways of translating ideas across systems. The chapters contained in this book reflect the participants' attempts to do so. The book is divided into four parts, by major themes that we have found useful categorizations."

In this volume, the authors discuss what practical contributions ecology can and can't make in applied science and environmental problem solving. In the first section, they discuss conceptual problems that have often prevented the formulation and evaluation of powerful, precise, general theories, explain why island biogeography is still beset with controversy and examine the ways in which science is value laden. In the second section, they describe how ecology can give us specific answers to practical environmental questions posed in individual case studies, and argue for a new way to look at scientific error. A case study using the Florida panther is examined in the light of these findings. They end by suggesting a bright future for the important, but relatively undeveloped task of applying ecology to practical environmental problem solving.

Tortoises, those unmistakable turtles, evolved from a lineage that split off from the familiar pond turtles roughly 100 million years ago. Over time, these plant-eating land turtles spread around the world, growing to an enormous size (depending on the species) and living so long that they have become the stuff of legends. By most accounts, they are indeed the longest-lived of the turtles, with good records suggesting individuals may live as long as 180 years (anecdotal records suggest that some reach ages of 200 years or more). Providing the first comprehensive treatment of North America's tortoises, Biology and Conservation of North American Tortoises brings together leading experts to give an overview of tortoise morphology, taxonomy, systematics, paleontology, physiology, ecology, behavior, reproduction, diet, growth, health, and conservation. The contributors carefully combine their own expertise and observations with results from studies conducted by hundreds of other researchers. The result is a book that belongs in the library of every herpetologist. Contributors include: Gustavo Aguirre; L. Linda; J. Allison Matthew; J. Aresco Roy; C. Averill-Murray; Joan E. Berish; Kristin H. Berry; Dennis M. Bramble; K. Kristina Drake; Taylor Edwards; Todd C. Esque; Richard Franz; Craig Guyer; J. Scott Harrison; Sharon M. Hermann; J. Howard Hutchison; Elliott R. Jacobson; Valerie M. Johnson; Richard T. Kazmaier; Earl D. McCoy; Philip A. Medica; Robert W. Murphy; Henry R. Mushinsky; Kenneth E. Nussear; Michael P. O'Connor; Thomas A. Radzio; David C. Rostal; Lora L. Smith; James R. Spotila; Craig B. Stanford; C. Richard Tracy; Tracey D. Tuberville; Michael Tuma; and, Thane Wibbels.