Finding the Tradeoffs Between the Reserve Design and Representation

Many reserve selection tools have been created to solve the minimum representation problem, selecting the least costly set of sites such that all conservation surrogate targets are met. However, there are practical problems and risks associated with this method for finding reserve network alternatives, including the treatment of persistence-promoting design considerations as secondary objectives. Here, reserve networks are generated for a hypothetical landscape where the objectives are to maximize representation and to maximize conformance with persistence-promoting design principles, subject to a constraint on the number of sites in the networks. The efficiency of potential networks is calculated as the total number of species captured in the included sites. Effectiveness is measured as a function of the size of individual patches, total reserve size, and extent of interpatch connectivity. A series of tradeoff curves are produced showing the nondominated compromise alternatives between representation and design for organisms with varying dispersal capabilities. Each alternative comprises a list of selected sites and covers species, as well as the identities and locations of the interpatch edges connecting the sites. Potential ways to use the results are discussed.

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