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What if there were no lemmings?

by Suzanne Slade, Carol Schwartz

Discusses the tundra ecosystem and the role of lemmings as a keystone species in helping to maintain it, describing the lemmings' place on the food chain and what would happen to the tundra if they were to become extinct. Focusing on the value of biodiversity and preservation, this book explains what would happen to a tundra ecosystem if lemmings disappeared.