| http://www.w3.org/ns/prov#value | - The motivation for protecting land in this case stems from a response to threats such as human use, deforestation, and population growth (Ridenour, 1994; Hopkins, 1995; Lowry, 1999; Macleod, 2001; The Coalition of Concerned National Park Service Retirees, 2004; Stoll-Kleemann, 2005; Hayes, 2006).
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