琅琊山国家森林公园生物资源的保护与开发

本文分析了琅琊山国家森林公园生物资源的生存环境和现状．提出了相应的保护与开发利用对策。     

基于推力-引力因素的旅游动机定量评价研究——以黄山为例兼论与韩国国家公园的比较

旅游推力—引力因素是研究旅游行为潜在动机的有效方法。本项研究在大量实地调查的基础上，应用因子分析法（Factor Analysis），以山岳型旅游地黄山为案例区，从推力因素和引力因素两个领域定量分析黄山旅游者旅游动机的潜在特征，确立5个推力公因子和4个引力公因子，同时运用对比分析法。分析了中国黄山与韩国国家公园推力-引力因素的共性和个性。     

External threats: the dilemma of resource management on the Colorado River in Grand Canyon National park,USA

The United States Congress established Grand Canyon National Park in 1919 to preserve for posterity the outstanding natural attributes of the canyon cut by the Colorado River. In some cases National Park Service attempts to maintain Grand Canyon's natural environment have been thwarted by activities outside the park. One of the most obvious external threats is Glen Canyon Dam, only 26 km upstream from the park boundary. Constructed in 1963, this gigantic dam has greatly altered the physicochemical and biological characteristics of 446 km of the Colorado River in Grand Canyon National Park. The river's aquatic ecosystem has been greatly modified through the loss of indigenous species and the addition of numerous exotics. We consider this anexotic ecosystem. The riparian ecosystem has been less modified, with addition of a few exotics and no loss of natives—this we consider anaturalized ecosystem.The great dilemma now faced by park managers is that, after 20 years of managing resources along a river controlled by Glen Canyon Dam, the Bureau of Reclamation has proposed major changes in operational procedures for the dam. Scientists and managers from the National Park Service, Bureau of Reclamation, and cooperating federal and state resource management agencies are using a systems analysis approach to examine the impacts of various Colorado River flow regimes on aquatic, riparian, and recreational parameters in the park. This approach will help in the development of management alternatives designed to permit the most efficient use of that river's natural resources without their destruction.