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Full-Text Articles in Physical Sciences and Mathematics
Preserves At Risk: An Investigation Of Resource Management Strategies, Implications And Opportunities, R. J. Lilieholm
Preserves At Risk: An Investigation Of Resource Management Strategies, Implications And Opportunities, R. J. Lilieholm
Elusive Documents
Human activities already threaten the globe's physical and biological systems. Worldwide, species extinction rates are estimated to be one thousand times what they would be in the absence of human activity (Wilson 1988). Raven (1988) estimates that 25% of the world's plant and animal species existing in 1985 may be extinct by 2015, with most extinctions occurring in tropical regions. While these extinction rates are staggering, global warming would greatly accelerate extinction rates that some scientists believe may already exceed those accompanying the decline of the dinosaurs 65 million years ago (Wolf 1987).
Historical Vegetation, Fuel Loads, And Integrated Resource Information System For Bryce Canyon National Park, Utah State University, Department Of Forest Resources And Ecology Center
Historical Vegetation, Fuel Loads, And Integrated Resource Information System For Bryce Canyon National Park, Utah State University, Department Of Forest Resources And Ecology Center
Elusive Documents
This report describes a comprehensive approach to understanding the role and effects of fire in Bryce Canyon National Park. The study includes a reconstruction of the historic vegetation of Bryce Canyon National Park from historic photographs, inference from computer simulation models, and research in areas of similar vegetation. The successional pathways from the historic vegetation to the present are discussed and the landscape scale consequences of fire suppression and successional devolopment are addressed.