摘要
生态评价对国家重点生态功能区县域生态保护与恢复和可持续发展具有重要意义。基于乌兰察布市4个县域国家重点生态功能区2020-2022年数据,从生态格局、生态功能、生物多样性和生态胁迫4个一级指标,从时间和空间2个角度对乌兰察布市4个县域国家重点生态功能区的生态质量变化趋势及对降水的响应机制进行了研究。结果表明:①乌兰察布市4个国家重点生态功能区县域生态质量整体良好,充分发挥了重点生态功能区的防风固沙作用;②以2020年为基准年,2021年和2022年4个县域国家生态功能区生态质量不同程度变差,急需进一步加强生态保护和修复;③生态质量与5-9月份降水量和全年降水量均显著相关(P<0.05),降水量和全年降水量主要影响的是生态功能,呈显著相关(P<0.05),而与生态格局、生物多样性、生态胁迫的相关性不显著,说明降水量减少是导致生态质量整体降低的重要原因。
Ecological assessment plays an important role in ecological protection,restoration and sustainable development of counties in national key ecological functional areas.Based on the data of the four national key ecological 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 Ulanqab 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:①the 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 ecological functional areas in windbreak and sand fixation;②Taking 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;③The 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 correlation 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.
作者
杨媛媛
杨腾辉
黎建强
康树文
赵学青
Yang Yuanyuan;Yang Tenghui;Li Jianqiang;Kang Shuwen;Zhao Xueqing(Ecological Civilization Construction and Evaluation Center of Ulanqab,Ulanqab 012000,Inner Mongolia,China;Beiben Heavy Truck Bridge Box Co.,LTD.,Baotou 014000,Inner Mongolia,China;College of Soil and Water Conservation,Southwest Forestry University,Kunming 650224,Yunnan,China)
出处
《绿色科技》
2024年第14期24-27,44,共5页
Journal of Green Science and Technology
基金
云南省“兴滇英才支持计划”青年人才专项(编号:XDYC-QNRC-2022-0205)
国家自然科学基金项目(编号:32060345)。
关键词
国家重点生态功能区
生态质量
防风固沙
national key ecological functional areas
ecological quality
wind prevention and sand fixation
