Quantitative assessment of ecological security and its influencing factors in the Danjiangkou Reservoir based on a health-risk-service framework
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View abstract on PubMed
Summary
This summary is machine-generated.Ecological security in the Danjiangkou Reservoir shows a fluctuating upward trend, with over 95% of the area maintaining medium or higher ecological security. Natural factors like NDVI and landscape metrics positively influence ecological security, while urbanization negatively impacts it.
Area Of Science
- Environmental Science
- Ecology
- Water Resource Management
Background
- The Danjiangkou Reservoir (DR) is crucial for China's South-to-North Water Diversion Project (SNWDP), supplying water to North China.
- Ecological security (ES) of the DR is vital for water supply and regional sustainability.
- Systematic assessments of ES in the DR region are limited.
Purpose Of The Study
- To develop and apply a health-risk-service framework for evaluating the evolution of ecological security in the DR.
- To identify the dominant natural, anthropogenic, and landscape factors influencing ES variation using the XGBoost-SHAP model.
Main Methods
- Development of a health-risk-service framework to assess ecological security.
- Application of the XGBoost-SHAP model to determine influential factors on ecological security.
- Analysis of ecological security evolution across three benchmark years: 2003, 2013, and 2023.
Main Results
- The framework demonstrated a strong correlation between the ecological security index (ESI) and the remote sensing ecological index (RSEI) (R² > 0.8).
- ESI showed a fluctuating upward trend, with over 95% of the area classified as Medium or above in ecological security.
- NDVI and Landscape Proportion Index (LPI) were key positive drivers, while Human Development Index (HDI) and urbanization were negative drivers, exhibiting nonlinear threshold effects.
Conclusions
- The developed framework provides a practical method for evaluating ESI in reservoir regions.
- Findings offer a scientific basis for ecological protection and management in water diversion project source areas.
- Understanding the nonlinear threshold effects of influencing factors is crucial for effective ecological management.
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