【摘要】 乌江流域位于长江上游,境内生态环境状况好坏直接影响着下游生态质量。为加强流域境内生态保护,改善流域生态质量,针对贵州省内乌江流域进行生态评价,了解2000—2015年贵州省内乌江流域生态变化动态。研究从景观层次上选取生态风险(ERI)、生态服务价值、景观格局、景观脆弱性这几个指标构成评价体系对贵州省乌江流域的生态环境进行评价分析。结果表明,流域内景观破碎度程度先减小后增大且景观形状也先由复杂趋于简单再变复杂,景观异质性一直呈下降趋势;流域内脆弱性指数、敏感度指数一直在减小,适应度指数一直在增大,生态风险指数在逐步减小;除耕地外,其余地类生态服务价值均呈现上升趋势;总体生态环境得以很好的改善。更多还原

【Abstract】 Wujiang River Basin is located in the upper reach of the Yangtze River.The quality of the ecological environment in the area directly affects the ecological quality downstream.In order to promote ecological protection in the area and improve its ecological quality,we carried out ecological assessment of the Wujiang River Basin to understand the dynamic changes of the ecological environment in the area from 2000 to 2015.We selected ERI,ecological service value,landscape pattern,and landscape vulnerability as ecological indicators to form an evaluation system to evaluate the ecological environment of the Wujiang River Basin.The results showed that the degree of landscape fragmentation in the basin decreased first and then increased,and the landscape shape changed from complex to simple and then to complex.The heterogeneity of landscape had been decreasing.The vulnerability index,the sensitivity index and the ecological risk index in the basin had been decreasing,while the fitness index had been increasing.Except for cultivated land,the ecological service value of all the land use types had shown an upward trend.The overall ecological environment had been improved.更多还原