A Chinese database on ecological thresholds and alternative stable states

The concepts of ecological thresholds and alternative stable states were proposed to explain nonlinear changes. However, the greatest obstacle to advance these theories and their managerial applications is a lack of data and research experience. There are almost all types of ecosystems in China, and various ecological degradation and catastrophe events occurred at the end of the 20th century. Considerable monitoring data and research cases that focus on the ecological thresholds are published in Chinese, limiting their dissemination around the world. We integrate Chinese cases and data that refer to the framework of Threshold Database and Regime Shifts Database. We introduce the China Ecological Thresholds and Alternative Stable States Database (CETASSD), developed by the Chinese Research Academy of Environmental Sciences, which mainly collects research cases. The CETASSD uses a unified description framework to integrate key information from past 110 case studies from China. This paper summarizes relevant case studies with intrinsic consistency to ecological thresholds and alternative stable states in social-ecological systems. We collate and analyze 26 potential alternative stable states and 60 potential ecological thresholds in CETASSD, covering 14 types of ecosystems. We found several peculiarities of the Chinese case studies. First, more types of alternative stable states were identified in arid areas and Qinghai-Tibet Plateau. Second, critical thresholds research related to spatial gradient has received great attention. Third, methods of constructing highly generalized “stress-response” process lines are mainly used for threshold analysis. We suggest re-examining past research cases and methods with the latest theories of ecological thresholds and alternative stable states; strengthening research on the detection of threshold and mechanism establishment of certain ecosystems, such as the ocean in China; and further applying ecological thresholds to ecological assessment and early warning

China · Data science · Ecological systems theory · Environmental resource management · Geography · Obstacle · Computer Science · Ecosystem dynamics and resilience · Environmental Science · Land Use and Ecosystem Services · Sustainability and Ecological Systems Analysis · Ecology

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