某抽水蓄能电站生态完整性评价研究

Study on the evaluation of ecological integrity of a pumped-storage power station

文章根据景观生态学的原理及方法,选用景观优势度、生态系统生产力和景观多样性3个景观格局指数评价某抽水蓄能电站生态完整性。研究表明:工程建设前后景观优势度值大小排序没有改变,反映工程建设对评价区内景观系统的结构影响较小;工程建设前后生态系统总生产力分别为31366.45、29522.01 t,反映自然演变和人类的开发活动对区域自然系统的生产能力产生一定影响,评价区植被生产力有所降低;工程建设前后景观多样性指数分别为0.88、0.87,分别占多样性指数最大值(1.79)的49.16%、48.60%,反映该电站景观多样性程度处于适中水平,生态系统具有一定的阻抗干扰能力,由于人类干扰强度加大,该电站的生态完整性受到一定的影响。

Based on the principles and methods of landscape ecology,this paper selects three landscape pattern indices,landscape dominance,ecosystem productivity and landscape diversity,to evaluate the ecological integrity of a pumped-storage power station.The research shows that the ranking of landscape dominance values before and after the construction of the project has not changed,which reflects that the construction of the project has little impact on the structure of the landscape system in the evaluation area;the total productivity of the ecosystem before and after the construction of the project is 31366.45 t and 29522.01 t respectively,reflecting that the natural evolution and human development activities have a certain impact on the production capacity of the regional natural system,and the vegetation productivity in the evaluation area has decreased;the landscape diversity indices before and after construction are 0.88 and 0.87,respectively accounting for 49.16%and 48.60%of the maximum diversity index(1.79),reflecting that the landscape diversity of the power station is at a moderate level,and the ecosystem has certain interference resistance.Due to the increased intensity of human interference,the ecological integrity of the power station has been affected to a certain extent.