Evaluation and optimization of ecological service function of greenbelt system in Yunlong demonstration area in Zhuzhou
Greenbelt system is an important constituent part of urban natural ecosystem. It has important ecological service efficiency.The concept of ecological service efficiency index (ESEI) was used in this paper. Six indicatorsincluding water conservation, conservation of soil, carbon fixation and oxygen released, nutrient accumulation, atmosphere environmental purification, biodiversityconservation were selected to construct an evaluation modelof the ecological services of Yunlonggreenbelt system. The ESEI of the system was evaluated and predicted using the method of entire-array-polygon diagram index under three scenarios, including current condition, regulatory detailed planning, and ideal condition. Evaluation results show that by adjusting the structural proportion of high forest, shrubbery, bamboo forest, economic forest and nursery, the ESEI of greenbeltsystem for the three scenarios were 0.24, 0.70 and 1.26, respectively. When the area of greenbelt system in Yunlong demonstration area is more than 6 612 hm2, and the structural proportion of high forest, shrubbery, bamboo forest, economic forest and nursery adjust to 620 ∶ 20 ∶ 5 ∶ 10 ∶ 6, the ecological service efficiency of greenbelt system will be ideal condition. At the same time, we should choose the local plants firstly when deployingplants, it is useful for expressing the ecological service efficiency of greenbelt system.
urban-rural greenbelt systemassessment of ecological service efficiencyentire-array-polygon diagram index methodYunlong demonstration area in Zhuzhou
NETL
NSTL
万方数据
维普
