基于LUCC的生态系统服务价值时空演变——以祁连山区域为例  

Temporal and spatial variation of ecosystem service value in the Qilian Mountains Region:A case study based on land use and land cover change

作　　者：马鑫[1] 李广[2] 李杰[2] MA Xin;LI Guang;LI Jie(College of Science of Gansu Agricultural University,Lanzhou 730070,Gansu,China;College of Forestry of Gansu Agricultural University,Lanzhou 730070,Gansu,China)

机构地区：[1]甘肃农业大学理学院,甘肃兰州730070 [2]甘肃农业大学林学院,甘肃兰州730070

出　　处：《草业科学》2024年第6期1492-1505,共14页Pratacultural Science

基　　金：国家自然科学基金项目(32360438);甘肃省拔尖领军人才项目(GSBJLJ-2023-09);甘肃省重点研究发展计划项目(22YF7FA116);甘肃省软科学专项-公开征集类(23JRZA449);甘肃省高等学校产业支撑项目(2022CYZC-41);甘肃省财政专项(GSCZZ 20160909)。

摘　　要：分析祁连山区域生态系统服务价值的时空变化特征,可为该区土地高效开发利用、生态恢复与保护机制的构建提供数据支撑。基于1980年、1990年、2000年、2010年和2020年的土地利用数据,运用改进的当量因子定量评估祁连山区域不同历史时期的生态系统服务价值,结合空间自相关及GIS空间统计方法,探究研究区不同乡镇的地均生态系统服务价值时空变化特征。结果表明:1)1980-2020年,研究区主要土地类型为未利用地、草地、林地、耕地,总覆盖率在93%以上。其中林地和未利用地面积减少,建设用地动态度变化最大。2)1980-2020年,祁连山区域生态系统服务总价值增加了170.8285×10^(8)元,其中草地、林地和水域的生态服务价值占78%,水文调节和气候调节的生态服务价值占60.14%。3)地均生态系统服务价值的空间正相关性较明显,空间集聚程度较高。高值聚集区有由增加向减少转变的趋势,低值聚集区逐年增加。4)1980-2010年,祁连山区域南部生态系统服务价值高于北部,北部生态系统服务价值在2010年后有增加趋势,但研究区南北间生态系统服务价值还未达到均衡和稳定。Analyzing the temporal-spatial variation of ecosystem service value in the Qilian Mountains region supports land development,ecological restoration,and protection mechanisms.Based on the land use/cover change(LUCC)data for five periods in 1980,1990,2000,2010 and 2020,an improved equivalent factor was used to quantitatively assess the value of ecosystem services in different periods of the Qilian Mountains Region,and spatial autocorrelation analysis and the GIS spatial statistics method were used to explore the spatio-temporal variation characteristics of ecosystem services value in each township-level unit.The results indicate that 1)from 1980 to 2020,the main land types in the study area were unused land,grassland,forest land,and cultivated land with a total coverage rate of more than 93%.Only woodland and unused land decreased.The land types with the biggest change in dynamic degree was construction land.2)From 1980 to 2020,the total value of ecosystem services in the Qilian Mountains Region increased by 170.8285×10^(8) yuan.Grassland,woodland,and waters accounted for 78% of the value of ecological services.The ecological service value of hydrologic regulation and climate regulation accounted for 60.14%.3)Land-average ESV exhibited a strong positive spatial correlation with agglomeration distribution patterns.High-value aggregation areas exhibited a tendency of decreasing,while low-value agglomeration areas increased annually.4)From 1980 to 2010,the value of ecosystem services in the southern parts of the study area was higher than that in the northern regions.Since 2010,ecosystem service values in the north have been increasing,yet equilibrium and stability between the north and south regions remain elusive.

关 键 词：土地利用 生态系统服务价值 当量因子 动态度 时空变化 空间自相关 聚集区 

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]