Ecosystems of national parks.

摘要: The preservation and maintenance of natural park ecosystems, with modern man's being restricted to generally nonconsumptive uses the park, represents one end a spectrum land use that extends through exploitation ecosystems development simplified agricultural ecosystems. Criteria for management ecosystem must, necessity, differ from criteria other land, since involves preventing or compensating influence man. objectives areas appear be ecologically feasible if it is recognized these have finite capacity absorbing consumptive disruptive influences. interpretation visitors provides an opportunity contribute environmental ethic beyond environment.