摘要
为理清土地利用变化对生态系统服务价值的影响效应,基于甘肃省农牧交错带2000、2010、2020年3个时期的土地利用/覆盖变化(LUCC)数据,运用改进的当量因子定量评估甘肃省农牧交错带生态系统服务价值,结合空间自相关分析法探究各乡镇级单位生态系统服务价值变化的时空格局演变特征。结果显示:1)2000-2020年甘肃省农牧交错带土地利用类型主要以草地、耕地、林地为主,其中,草地、林地和建设用地面积增加,而耕地和湿地面积减少。2)2000-2020年甘肃省农牧交错带生态系统服务总价值增加了11.2358×10^(8)元,调节服务在各时期占主导地位,水文调节和气候调节生态系统服务价值较大,草地和林地在维持水文调节和气候调节服务价值方面作用重大,是维持甘肃省农牧交错带生态系统服务总价值的关键土地利用类型。3)地均生态系统服务价值(ESV)呈较强的空间正相关性,在空间上整体表现为显著的集聚分布格局,高值集聚区和低值集聚区的空间演变保持平稳。研究结果可为甘肃省农牧交错带制定科学合理的生态保护政策、建立生态保护修复的长效机制提供科学依据。
This study aimed to clarify the impact of land-use changes on ecosystem service values,based on land use/cover change(LUCC)for the agro-pastoral ecotone of Gansu Province in 2000,2010,and 2020.We used an equivalence factor to quantitatively assess the ecosystem service value of the agro-pastoral ecotone of Gansu Province,then used a spatial autocorrelation analysis method to study the temporal-spatial changes in ecological service values in each township unit.It was found that:1)From 2000 to 2020,the main land-use types in the agro-pastoral ecotone of Gansu Province were grassland,cultivated land,and woodland.During the period from 2000 to 2020,the areas of grassland,woodland,and construction land increased,while the areas of cultivated land and wetlands decreased.2)From 2000 to 2020,the total value of ecosystem services in the agro-pastoral ecotone of Gansu Province increased by 11.2358×10^(8) yuan,and regulatory services dominated in all periods.Regulation of water flows and climate had large ecological service values.Grassland and woodland played significant roles in maintaining the value of hydrological and climatic regulation services,and were the key land-use types to maintain the total ecosystem service value(ESV)in the agro-pastoral ecotone of Gansu Province.3)The ESV showed a strong positive spatial correlation,with an overall significant spatial pattern of agglomeration,and the spatial evolution of high-and low-value agglomerations remained stable.These results provide a scientific basis for formulating appropriate ecological protection policies,and for establishing a long-term strategy for ecological protection and restoration in the agro-pastoral ecotone of Gansu Province.
作者
梁赟亮
李杰
陆燕花
李广
LIANG Yun-liang;LI Jie;LU Yan-hua;LI Guang(College of Forest of Gansu Agricultural University,Lanzhou 730070,China)
出处
《草业学报》
CSCD
北大核心
2023年第5期13-26,共14页
Acta Prataculturae Sinica
基金
甘肃省财政专项(GSCZZ 20160909)
甘肃省重点研究发展计划(20YF8NA135)
甘肃省高等学校产业支撑项目(2021CYZC-15)资助。
关键词
土地利用/覆盖变化
生态系统服务价值
时空演变特征
甘肃省农牧交错带
land use/cover change
ecosystem service value
temporal-spatial evolution characteristics
agro-pastoral ecotone of Gansu Province
