Chapter

Systematic Conservation Planning

James H. Thorne, Patrick R. Huber and Susan Harrison

in Serpentine

Published by University of California Press

Published in print February 2011 | ISBN: 9780520268357
Published online March 2012 | e-ISBN: 9780520948457 | DOI: http://dx.doi.org/10.1525/california/9780520268357.003.0015
Systematic Conservation Planning

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This chapter uses serpentine plants to explore the trade-offs among rarity, representation, and connectivity in systematic land-based conservation. It analyzes a serpentine-rich landscape in the region of Napa County, California, from three perspectives: (1) the existing network of protected areas, relatively little of which is the product of biodiversity considerations; (2) the program Marxan, a widely used reserve design algorithm that identifies spatial solutions to user-determined objectives, one of which is typically the representation of all plant community types; and (3) least-cost corridor analysis, an algorithm that identifies large blocks of undisturbed habitat and the linkages between them which are most likely to provide connectivity for wildlife movement. By comparing how well the plant communities and known occurrences of rare plant species on serpentine and non-serpentine soils are protected under each of these approaches, the degree to which serpentine floras have unique conservation requirements can be assessed.

Keywords: serpentine plants; land-based conservation; Napa County; Marxan; least-cost corridor; plant communities

Chapter.  6767 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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