Threats to the national parks in the United States are many and varied. These range from climate changes, animal/fish population cycle variations, invasive species introduction, and cultural affects of indigenous peoples to problems associated with natural disasters, oil spills, land development, and criminal enterprises. The U.S. Department of the Interior National Park Service (NPS) has issue...

The sensitivity of high-elevation lakes to acidic deposition was evaluated in five national parks of the Rocky Mountains based on statistical relations between lake acid-neutralizing capacity concentrations and basin characteristics. Acid-neutralizing capacity (ANC) of 151 lakes sampled during synoptic surveys and basin-characteristic information derived from geographic information system (GIS)...

Measurements of volatile organic compounds (VOCs) were made at three rural sites in the southeast U.S. national parks: Mammoth Cave National Park, Kentucky; Cove Mountain, Great Smoky Mountains National Park, Tennessee; and Big Meadows, Shenandoah National Park, Virginia. In 1995 the three locations were sampling sites for the Southern Oxidants Study (SOS) Nashville Intensive, and the measureme...

protected areas are major tourism assets for a nation, particularly for developing countries providing sustainable benefit to the local community while funding for the maintenance and rehabilitation of the protected areas themselves. valley of flowers national park is naturally meant for the conservation and study of western himalayan flora. it became national park in 1982 and after that livest...

fragmentation is one of the major spatial processes leading to change in a landscape, which is described as transformation of a specific habitat or land cover to smaller patches with less connectivity and viability. construction of roads is one of the main causes of fragmentation in natural areas and habitats. presence of roads in ecologically sensitive and protected areas, leads to destruction...

W. A. Bunn ([email protected]), C. B. Brown and N. J. Sanders, Dept of Ecology and Evolutionary Biology, Univ. of Tennessee, 569 Dabney Hall, Knoxville, TN 37996, USA. (Present address of W. A. B.: USDOI, National Park Service, Grand Canyon National Park, P. O. Box 129, Grand Canyon, AZ 86023, USA.) !M. A. Jenkins, USDOI, National Park Service, Great Smoky Mountains National Park, 1314 Cheroke...

this method is based on assigning some weghing values for natural, cultural, and recreational resources of a site for national parks. numerical value are used to determine whether a particular area is suitable for the of national parks. delfi technique is also employed to reduce the subjectivity as well as, bias in site selection, criteria used in parts of the world for this p~ are the basis of...

1Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA 2 Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, US Environmental Protection Agency, Research Triangl...