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Ecosystem resilience response to forest fragmentation in China: Thresholds identification
Xinxin Fu1, Zhenhong Li2, Jiahao Ma1
1College of Geological Engineering and Geomatics, Chang'an University, Xi'an, 710054, China; Big Data Center for Geosciences and Satellites, Chang'an University, Xi'an, 710054, China.
Forest fragmentation significantly impacts ecosystem resilience, with a clear threshold effect. Beyond this critical point, increased fragmentation leads to a substantial decline in ecological resilience.
Area of Science:
- Ecology
- Environmental Science
- Landscape Ecology
Background:
- Ecosystem resilience is crucial for maintaining stability amid disturbances.
- Global resilience declines are linked to climate variability and water constraints.
- The threshold effects of forest fragmentation on resilience are underexplored.
Purpose of the Study:
- To quantify forest fragmentation and resilience dynamics in China (1990-2022).
- To identify threshold effects of forest fragmentation on ecosystem resilience.
- To inform ecological management strategies through identified thresholds.
Main Methods:
- Utilized long-term land use data and satellite-derived vegetation indices.
- Analyzed spatial and temporal trends of forest fragmentation and resilience.
- Employed breakpoint regression to detect fragmentation thresholds impacting resilience.
Main Results:
- Approximately 30% of forest areas showed increased fragmentation.
- Fragmentation and resilience trends were negatively correlated, influenced by vegetation and moisture.
- A distinct threshold effect of fragmentation on resilience was identified.
Conclusions:
- Forest fragmentation exhibits a threshold effect on ecosystem resilience.
- Resilience decreases significantly once fragmentation surpasses a critical threshold.
- Identified thresholds can guide landscape management for optimized ecological resilience.
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