Biological diversity is considered one of today’s most urgent environmental concerns, yet the term was first coined only twenty-five years ago. Why did the concept of biological diversity so quickly capture public attention and emerge as a banner issue for the environmental movement? In this book, Timothy J. Farnham explores for the first time the historical roots of biological diversity, tracing the evolution of the term as well as the history of the conservation traditions that contributed to its rapid acceptance and popularity. Biological diversity is understood today as consisting of three components--species diversity, genetic diversity, and ecosystem diversity. Farnham finds that these three tiers coincided with three earlier, disparate conservation traditions that converged when the cause of preserving biological diversity was articulated. He tells the stories of these different historical foundations, recounts how the term came into the environmental lexicon, and shows how the evolution of the idea of biological diversity reflects an evolution of American attitudes toward the natural world.

The UC Natural Reserve System, established in 1965 to support field research, teaching, and public service in natural environments, has become a prototype of conservation and land stewardship looked to by natural resource managers throughout the world. From its modest beginnings of seven sites, the UC NRS has grown to encompass more than 750,000 wildland acres. This book tells the story of how a few forward-thinking UC faculty, who’d had their research plots and teaching spots destroyed by development and habitat degradation, devised a way to save representative examples of many of California’s major ecosystems. Working together with conservation-minded donors and landowners, with state and federal agencies, and with land trusts and private conservation organizations, they founded what would become the world’s largest university-administered natural reserve system—a legacy of lasting significance and utility. This lavishly illustrated volume, which includes images by famed photographers Ansel Adams and Galen Rowell, describes the natural and human histories of the system’s many reserves. Located throughout California, these wildland habitats range from coastal tide pools to inland deserts, from lush wetlands to ancient forests, and from vernal pools to oak savannas. By supporting teaching, research, and public service within such protected landscapes, the UC NRS contributes to the understanding and wise stewardship of the Earth.

This new collection focuses on the impact of sprawl on biodiversity and the measures that can be taken to alleviate it. Leading biological and social scientists, conservationists, and land-use professionals examine how sprawl affects species and alters natural communities, ecosystems, and natural processes. The contributors integrate biodiversity issues, concerns, and needs into the growing number of anti-sprawl initiatives, including the "smart growth" and "new urbanist" movements.

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The essential, cornerstone book of modern environmentalism is now offered in a handsome 40th anniversary edition which features a new Introduction by activist Terry Tempest Williams and a new Afterword by Carson biographer Linda Lear.