Scenario decision of ecological security based on the trade-off among ecosystem services
CHEN Tian-tian1, PENG Li2, WANG Qiang3
1. Chongqing Key Laboratory of Earth Surface Process and Environment Remote Sensing in the Three Gorges Reservoir Area, College of Geography and Tourism, Chongqing Normal University, Chongqing 401331; 2. The Faculty Geography Resource Science Sichuan Normal University, Sichuan Chengdu 610066; 3. Chongqing Institute of Surveying and Monitoring for Planning and Natural Resources, Chongqing 401147, China
Abstract:Focusing on the theme of identifying the ecological security pattern of the Chengdu-Chongqing Urban Agglomeration and coupling multi-source data, this study uses corresponding models and algorithms to estimate the value of regional food production, carbon sequestration, water production, soil conservation, and habitat quality. On this basis, spatial statistics and analysis are used to clarify the trade-off/synergy relationship between ecosystem service functions, and different risk scenarios are established to clarify the ecological security pattern which is suitable for regional development. It showed that from 2000 to 2015, the three ecosystem service functions of food production, carbon sequestration and water production in Chengdu-Chongqing urban agglomeration displayed a downward trend, while the other two functions of soil conservation and habitat quality had an upward trend, and the spatial distribution of various services was obviously heterogeneous. There was a synergistic relationship among the four ecosystem services of carbon sequestration, water production, soil conservation and habitat quality. Food production and these four ecosystem services all showed a trade-off relationship, but this conflict was gradually weakening in the process of regional development. In terms of spatial distribution, the trade-off/synergy relationship between these ecosystem services of the Chengdu-Chongqing urban agglomeration showed certain agglomeration characteristics. The trade-off between ecosystem services under different decision- making risks was also different. With the increase of the decision-making risk coefficient, the trade-off value showed a trend of rising first and then decreasing. Finally, the optimal scenario was determined as the risk coefficient α=1.6, the trade-off value was the highest and the risk was moderate under this scenario. Incorporating the attitude of decision-makers into the process of identifying the ecological security pattern to make the results more comprehensive and provide scientific support for the evaluation and management of the ecological security pattern of urban agglomerations.
陈田田, 彭立, 王强. 基于生态系统服务权衡的生态安全多情景决策[J]. 中国环境科学, 2021, 41(8): 3956-3968.
CHEN Tian-tian, PENG Li, WANG Qiang. Scenario decision of ecological security based on the trade-off among ecosystem services. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(8): 3956-3968.
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