Ecological assessment plays an important role in ecological protection,restoration and sustainable de-velopment of counties in national key ecological functional areas.Based on the data of the four national key eco-logical functional zones in Ulanqab City from 2020 to 2022,this paper studied the change trend of ecological quality and the response mechanism to precipitation of the four national key ecological functional areas in Ulan-qab City from the perspective of time and space from the four primary indexes of ecological pattern,ecological function,biodiversity and ecological stress.The results showed that:① the overall ecological quality of the four national key ecological functional areas in Ulanqab was good,which gave full play to the role of the key ecologi-cal functional areas in windbreak and sand fixation;② Taking 2020 as the base year,the ecological quality of the four county-level national ecological functional areas will deteriorate to varying degrees in 2021 and 2022.And it is urgent to further strengthen ecological protection and restoration;③ The ecological quality was significantly correlated with the precipitation from May to September and the annual precipitation(P<0.05).The ecological function was significantly correlated with the precipitation and the annual precipitation(P<0.05),while the cor-relation with the ecological pattern,biodiversity and ecological stress was not significant which indicated that the decrease of precipitation was an important reason for the overall decrease of ecological quality.
关键词
国家重点生态功能区/生态质量/防风固沙
Key words
national key ecological functional areas/ecological quality/wind prevention and sand fixation
维普
万方数据