HUMAN IMPACT ON THE MEADOW VEGETATION IN DONGLING MOUNTAIN, BEIJING AND MEASURES FOR CONSERVATION OF THE MEADOW VEGETATION
JIANG Yuan, ZHAO Hai xia, LIU Xiao cong, CHANG Yu tao (China Ecological Capital Assessment Research Center, Beijing Normal University;Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education, Beijing 100875,China)$$$$
The human impact on the mountain meadow vegetation growing 1 500 m above sea level in Dongling Mountain, Beijing, has been studied in this paper through the analyses to the field survey data collected from 41 quadrats (4 m×4 m each). The data were analyzed with respect to the ways and intensity of human impact, features of the meadow vegetation and characteristics of its habitats. The preliminary results are as follows: ①Most of the meadow communities in Dongling mountain are secondary vegetation under heavy human impacts. The primary meadow vegetation distributes only around the peak area of the mountain, higher than 2 000 m above sea level. ②The meadow communities with richer species composition are found at the places between 1 510～1 900 m above sea level, which is the direct results of natural environment deeply interfered by human activities. ③Development of tourism and sightseeing activities has exerted heavy impacts on the primary meadow vegetation around the peak area of the Mountain, which has led to the serious deterioration of the vegetation in some local areas. ④Regulations of restricting the tourism and sightseeing activities in meadow concentration areas, such as forbidding horse riding on sensitive areas, raising the price of cable car in busy tourism seasons, removing excessive hotels, and diverging the tourists within the low elevation range, are effective measures to protect the meadow vegetation. Meanwhile, researching further into the environmental capacity of the meadow vegetation, enhancing the tourism planning and improving the functional tourism divisions accordingly are also conducive to the conservation of the meadow vegetation.