Ecological thresholds as a basis for defining management triggers for National Park Service vital signs : case studies for dryland ecosystems / by Matthew A. Bowker [and three others] ; prepared in cooperation with the National Park Service.
- Physical Description: 1 online resource (vi, 94 pages) : illustrations (some color).
- Publisher: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2013.
|General Note:|| Title from title screen (viewed June 6, 2016).
|Bibliography, etc. Note:|| Includes bibliographical references (pages 82-88).
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