摘要
农业景观脆弱性是农业生态安全的重要度量方式,也是农业高质量发展的制约因素。文章采用土地利用变更调查数据,综合运用层次分析法、面板数据模型、Moran's I指数分析重庆市石柱县农业景观脆弱性时空演变特征及其驱动因素。结果显示:①研究区农业景观脆弱性水平呈现“上升-下降”的变化趋势,等级类型空间演替明显。其中暴露度高值分布呈现由东部向南部、西部、西北部逐渐加强,与城市扩张和人类活动干扰强度方向相一致;敏感性空间变化高值聚集区由西南部向北部、东部逐渐缩减;适应能力空间变化呈现“西高东低,北高南低”特征。②农业景观脆弱性呈显著空间自相关和集聚特征,脆弱性等级相对聚集。低度和轻度脆弱区集中于南部生态区和北部农业区;中度脆弱区集中于西南城镇区和东部旅游区;较高脆弱区集中于西南城镇区,少部分分布在北部农业区;高度脆弱区集中分布在西南城镇区。③研究区农业景观脆弱性演变主要受自然因素、经济因素、产业因素、制度和政策因素影响,自然地理环境是农业景观脆弱性形成的自然本底条件,社会经济和政策制度因素是农业景观脆弱性变化的外部因素。
The vulnerability of agricultural landscape is an important measure of agricultural ecological security,and also a constraint factor for agricultural high-quality development.Taking Shizhu County in Chongqing as an experimental subject,this article constructs the evaluation system of the agricultural landscape vulnerability from the perspectives of exposure,sensitivity and adaptability,and analyzes the spatio-temporal evolution characteristics of agricultural landscape vulnerability and its driving factors by the means of AHP,panel data model and Moran’s I.The results show that:1)The vulnerability level of agricultural landscape shows the characteristics of a"rising-falling"trend and spatial succession of hierarchical types.The distribution of high exposure values is gradually strengthened from the east to the south,west and northwest,which is consistent with the direction of urban expansion and human activity interference intensity.The areas with the high-value sensitivity gradually shifts from the southwest to the north and east.The spatial distribution of adaptive capacity is characterized by"high in the west and the north,low in the east and the south".2)The agricultural landscape vulnerability is characterized by significant spatial autocorrelation and aggregation.The vulnerability levels are relatively clustered.The low and light vulnerable areas are concentrated in the southern ecological area and the northern agricultural area,while the medium vulnerable areas are concentrated in the urban area of the southwest and the eastern tourism area.The higher vulnerable areas are concentrated in the urban areas in of the southwest,a few in the northern agricultural areas,and the highest vulnerable areas are concentrated in the urban areas of the southwest.3)The evolution of agricultural landscape vulnerability in the study area is mainly affected by economic factors,industrial factors,institutional factors and the landscape pattern.The natural geographical environment is the natural background condition for the
作者
江娟丽
杨庆媛
何秋兰
施开放
JIANG Juanli;YANG Qingyuan;HE Qiulan;SHI Kaifang(College of Economics and Management,Southwest University,Chongqing 400715,China;School of Geographical Sciences,Southwest University,Chongqing 400715,China)
出处
《经济地理》
CSCD
北大核心
2023年第1期177-187,共11页
Economic Geography
基金
重庆市社会科学规划重点项目(2021WT09)
重庆社会科学规划一般项目(2018YBGL056)
国家自然科学基金项目(42071234)。
关键词
农业景观
景观脆弱性
暴露度
敏感度
适应能力
城市扩张
驱动力
agricultural landscape
landscape vulnerability
exposure degree
sensitivity degree
adaptive capacity
urban expansion
driving force
