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In Ghost Bears, R. Edward Grumbine looks at the implications of the widespread loss of biological diversity, and explains why our species-centered approach to environmental protection will ultimately fail. Using the fate of the endangered grizzly bear — the 鈥済host bear鈥� — to explore the causes and effects of species loss and habitat destruction, Grumbine presents a clear and inviting introduction to the biodiversity crisis and to the new science of conservation biology.