China's ecological protection redlines: Evaluation framework and method of protection effect
HOU Peng;WANG Qiao;YANG Min;LI Jing;ZHAI Jun;CAI Mingyong;Satellite Environment Center,MEP;
Ecological protection redline is one of innovation regional ecological management systems, and a major strategy of construction of ecological civilization of China. This management system is established on the basis of a series of practice and development of regional ecological protection management, such as national reserves, key ecosystem service zones and forest parks. How to scientifically evaluate the effectiveness of ecological protection redline, to serve the comprehensive management of ecological protection redline and protect regional ecological security, has become one of the popular issues. According to the protective objectives and management policies issued, purpose of redline management is to protect regional ecological security and improve ecosystem service ability. The core of this task is to stabilize and gradually improve the regional ecosystem, such as natural ecological space and ecosystem services. Then, an evaluation framework, including indexes and methods, is put forward. In the framework, ecosystem structure and ecosystem services are taken as the main content of ecological protection effect assessment. By multi-dimensional space-time scale expansion, comprehensive evaluation is done by analysis of ecological changes before and after the implementation of ecological protection redline measures, by inside and outside of the redline protection zone. Moreover, comprehensive ecological protection effect is reflected by the regional ecological security contribution and regional ecosystem self-regulation ability. That is to say, the higher the contribution and self-regulation ability, the better the protection effects are. Furthermore, the management policies, measures and other indirect drivers that may cause ecological changes can be linked and analyzed to evaluate the implementation effectiveness of redline. This paper, taking Hainan and Guangdong provinces as the study region, applies the framework and methods. In Hainan, the contribution rate of ecological protection redline to natural ecological security space is 44.8%, and that of water conservation and soil conservation services is respectively 46.1% and 69.8%. In Guangdong, the contribution rate for increasing natural ecological space reaches 95%, that for improving the quality of ecosystem growth is up to 75%, and that for enhancing water and soil conservation services is 82.4% and54.6%, respectively.