近20年南充市土地利用与生态系统服务价值时空变化  

Spatio-temporal Changes of Land Use and Ecosystem Service Valueof Nanchong City in Recent 20 Years

作　　者：周建伟 王磊[2,3,4] 杨海青 邓青春[2,3,4] 刘辉 罗君[2,3,4] ZHOU Jian-wei;WANG Lei;YANG Hai-qing;DENG Qing-chun;LIU Hui;LUO Jun(College of Life Science,China West Normal University,Nanchong Sichuan 637009,China;School of Geographical Sciences,China West Normal University,Nanchong Sichuan 637009,China;Sichuan Provincial Engineering Laboratory of Monitoring and Control for Soil Erosion on Dry Valleys,China West Normal University,Nanchong Sichuan 637009,China;Liangshan Soil Erosion and Ecological Restoration in Dry Valleys Observation and Research Station,Xide Sichuan 616753,China)

机构地区：[1]西华师范大学生命科学学院,四川南充637009 [2]西华师范大学地理科学学院,四川南充637009 [3]西华师范大学四川省干旱河谷土壤侵蚀监测与控制工程实验室,四川南充637009 [4]大小凉山干旱河谷土壤侵蚀与生态修复野外科学观测研究站,四川喜德616753

出　　处：《西华师范大学学报（自然科学版）》2023年第2期121-130,共10页Journal of China West Normal University(Natural Sciences)

基　　金：国家自然科学基金项目(41971015)。

摘　　要：在城镇化推进和退耕还林还草等政策影响下,南充市土地利用结构发生显著改变,基于2000-2019年3个时期土地利用数据,运用价值当量因子和空间统计分析等方法,探索南充市土地利用与生态系统服务价值(ESV)的时空变化。结果表明:(1)耕地是南充市主要土地利用类型,占82%以上,2000-2019年耕地和灌木呈减少趋势,而林地、水域、草地和建设用地呈增长趋势,建设用地(109.44%)和水域(40.62%)增长最为显著。(2)2000-2019年南充市ESV总量先急速增长后小幅回落,净增加73.8亿元,增长率为22.89%,耕地ESV占38%以上;单项ESV以水文调节和土壤保持为主,两者占总ESV的44%以上;各县(市、区)ESV总量和单位面积ESV呈北高南低的特点。(3)2000-2019年3个时期ESV及其变化的Moran's I指数均大于0,具有显著自相关性;ESV高值区和低值区不断扩展,空间聚集性逐步增强;ESV减损区和变化冷点区集中于城镇建设区域,增益区和变化热点区集中于水域和林地覆盖区域。研究结果可为南充市国土规划和生态文明建设提供参考。Under the policy influence of urbanization promotion and returning farmland to forest and grassland,the land use structure of Nanchong has changed significantly.Based on the land use data of three periods from 2000 to 2019,the methods of value equivalent factor and spatial statistical analysis are employed to explore the spatio-temporal changes of land use and ecosystem service value(ESV)of Nanchong.The results show as follows:(1)the main land use type of Nanchong is cultivated land,accounting for more than 82%;the cultivated land and shrub had shown a decreasing trend from 2000 to 2019 whereas woodland,water area,grassland and construction land had shown an increasing trend,among which the growth rates of construction land(109.44%)and water area(40.62%)was the most significant;(2)from 2000 to 2019,the total ESV of Nanchong had increased rapidly at first and then decreased slightly,with a net increase of 7.38 billion yuan,a growth rate of 22.89%;the ESV of cultivated land had accounted for more than 38%;hydrological regulation and soil conservation were dominant in single ESV,accounting for more than 44%of the total ESV;the total ESV and ESV per unit area of each county(city,district)were high in the north and low in the south;(3)ESV and its changes of Moran's I index in the three periods from 2000 to 2019 were significantly autocorrelated;the high value region and low value region of ESV had continued to expand,and the spatial aggregation was gradually enhanced;ESV loss area and variation cold spot area were concentrated in the urban construction area,while gain area and variation hot spot area were centralized in water area and woodland covered area.The research results have provided references for the land planning and ecological civilization construction in Nanchong.

关 键 词：生态系统服务价值 时空变化 政策驱动 价值当量因子法 空间统计分析 

分 类 号：X171.1[环境科学与工程—环境科学] F301.2[经济管理—产业经济]