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Delineating protected wildlife corridors with multi-objective programmingby: J. C. Williams
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Notes for this articleWildlife corridors using flow formulation for Steiner trees.
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AbstractProtected wildlife corridors can help counteract habitat fragmentation and link isolated reserve islands into connected reserve systems. The need for wildlife corridors will grow as expanding human populations place increasing pressure on remaining undeveloped land. A two-objective zeroone programming model is formulated for the problem of selecting land for a system of wildlife corridors that must connect a known set of existing reserves or critical habitat areas. This problem is modeled as a network Steiner tree problem, under the objectives of minimizing corridor land costs and minimizing the amount of unsuitable land within the corridor system. Linear programming is used to find exact solutions with little or no branching and bounding, and the multi-objective weighting method is used to generate non-inferior alternatives. Two hypothetical examples demonstrate the model and solution procedure. Results can help inform planning and decision making for protected area land acquisition and habitat restoration.
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