Value Assessment of Typical Steppe Ecosystem in Yunwu Mountain National Nature Reserve
In order to evaluate the value and benefit of enclosure for grassland,typical steppe ecosystem in Yunwu Mountain National Nature Reserve was selected as the study model using emergy theory and the schedule of ecosystem unit service price in this paper to evaluate the value of ecological asset system and ecological service over 30 years' enclosure.Results indicated that after enclosure,the ecological value increased sharply in the earliest 10 years,then it maintained a high value during 10 to 25 years,and it declined slowly after 25 years.According to these data,the value of ecological asset system and ecological service reached at the peaks of 99,949,700 yuan and 107,000,000 yuan respectively in 2002.In general,the total values of the 30 years' period after enclosure are much higher than before indicating that enclosure has greatly improved the value of ecological asset system and ecological service,and has a significant effect on grassland.
NETL
NSTL
万方数据
维普
