Managing for biodiversity.

A discussion is presented of efficient strategies for species preservationin spite of continued human alteration of the environment. Current policy and unresolved questions are included in the discussion. Incentives to maintain seminatural areas as a conservation strategy are recommended: planting of hedgerows or windbreaks to provide corridors for migration of species during climate change; purchase of development rights of natural and seminatural land for conversion to park reserves when climate stabilizes; use of intercropping, traditional forest gardens and crop plantings in the tropics; and maintenance of seminatural habitats on public and private lands.

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