IUCN's Protected Areas Management Categories, which classify protected areas according to their management objectives, are today accepted as the benchmark for defining, recording, and classifying protected areas. They are recognized by international bodies such as the United Nations as well as many national governments. As a result, they are increasingly being incorporated into government legislation. These guidelines provide as much clarity as possible regarding the meaning and application of the Categories. They describe the definition of the Categories and discuss application in particular biomes and management approaches.

"Gone are those of the 1950s and early 1960s who championed preserving wild lands and who influenced and saw the birth of the National Wilderness Preservation System (NWPS). Gone too are myriad eager managers and proponents of wild land protection of the late 1960s and 1970s who helped rear the fledgling Wilderness system and bring it into adolescence by adding management practices and policy interpretations. In this, the 40th year since the birth of the NWPS, this middle-age federal land system is surrounded by many new faces as its childhood friends have moved on to other callings, have retired, or are no longer with us. Needed in these new times is a clear, comprehensive articulation of the multiple values of Wilderness. The overall purpose of this book is to tell fully what we know about the range of values Americans hold toward the NWPS in a factual, wide-ranging, and science-based way. A multidisciplinary team of authors and researchers clarify the meaning of different types of Wilderness values and present replicable, science-based evidence of these values in this volume. The intended audience is all those new faces who can and do have power over the future of the U.S. National Wilderness Preservation System as well as all who seek to influence those who have this power. This book is also intended for teachers, students, and other inquisitive people involved in formal or informal learning and research programs. The authors intend this compilation to help better inform interested and engaged members of the general public about the values of their public Wilderness areas. After all, it is the American citizen who is ultimately responsible and can influence public policy in the greatest measure through their individual and collective voices and actions." -- Publisher.

The Endangered Species Act (ESA) is a far-reaching law that has sparked intense controversies over the use of public lands, the rights of property owners, and economic versus environmental benefits. In this volume a distinguished committee focuses on the science underlying the ESA and offers recommendations for making the act more effective. The committee provides an overview of what scientists know about extinctionâ€"and what this understanding means to implementation of the ESA. Habitatâ€"its destruction, conservation, and fundamental importance to the ESAâ€"is explored in detail. The book analyzes: Concepts of speciesâ€"how the term "species" arose and how it has been interpreted for purposes of the ESA. Conflicts between species when individual species are identified for protection, including several case studies. Assessment of extinction risk and decisions under the ESAâ€"how these decisions can be made more effectively. The book concludes with a look beyond the Endangered Species Act and suggests additional means of biological conservation and ways to reduce conflicts. It will be useful to policymakers, regulators, scientists, natural-resource managers, industry and environmental organizations, and those interested in biological conservation.