[关键词]
[摘要]
基于“压力-状态-响应”(PSR)模型,采取客观赋权法中的熵值法来评估指标权重,通过加权累计得到生态系统健康评价综合值。结果表明,甘州区生态系统健康综合指数在2006 — 2015年期间呈现整体缓慢上升、平稳发展的趋势。生态系统健康压力指数整体呈现上升趋势,到2015年达到0.325 1;生态系统健康状态指数经历了波动阶段,2015年上升到0.136 1;响应指数经历了前期小幅度波动后稳定上升,2015年上升至0.235 2。甘州区生态系统健康状况虽然持续好转,却处于“一般病态”状态。
[Key word]
[Abstract]
Based on the “pressure-state-response”(PSR) model, the entropy method in the objective weighting method was used to evaluate the index weights, and the integrated value of the ecosystem health assessment was obtained through weighted cumulation. The results indicate that the comprehensive index of ecosystem health in the Ganzhou district exhibited an overall slow increase and steady development trend during 2006 to 2015. The ecosystem health pressure index went in an overall uptrend, reaching 0.325 1 in 2015; the ecosystem health status index experienced a wave of fluctuations and rose to 0.136 1 in 2015; the response index experienced a steady increase after a slight fluctuation in the previous period, and it rose to 0.235 2 in 2015. Although the state of ecosystem health in Ganzhou continues to improve, it is still in a state of “normal sickness”.
[中图分类号]
X826
[基金项目]