尼日河流域生态系统服务价值地形梯度分异及其驱动因素  

Topographic gradient differentiation of ecosystem service value and its driving factors in the Niri River Basin

作　　者：周建伟 吴华 冯彬 陈琳娜 孔玉忠 许童 赵鑫永 郭齐韵 李佳潼 ZHOU Jian-wei;WU Hua;FENG Bin;CHEN Lin-na;KONG Yu-zhong;XU Tong;ZHAO Xin-yong;GUO Qi-yun;LI Jia-tong(School of Eeology and Environment,Xizang University,Lhasa 850000,China;Joint Laboralory of Plateau Surface Remote Sensing,Xi-zang University,Lhasa 850000,China;School of Engineering,Xizang University,Lhasa 850000,China)

机构地区：[1]西藏大学生态环境学院,拉萨850000 [2]西藏大学高原地表环境遥感监测联合实验室,拉萨850000 [3]西藏大学工学院,拉萨850000

出　　处：《西南农业学报》2024年第11期2501-2512,共12页Southwest China Journal of Agricultural Sciences

基　　金：西藏大学人才创新团队与实验室平台建设(2022ZDTD10);中央支持地方部区合建项目(藏财预指【2023】1号);中国科学院“西部之光”访问学者项目;中央引导地方项目(XZ202401YD0028)。

摘　　要：【目的】研究尼日河流域生态系统服务价值(Ecosystem service value,ESV)的地形分异及其驱动因素,以期为区域生态文明建设和经济发展提供理论依据。【方法】基于2000—2021年高精度土地利用数据,利用ESV评估模型和地形梯度分级,分析尼日河流域ESV的时空演变和地形梯度分异特征,利用地理探测器分析其空间分异的驱动因素。【结果】2000—2021年尼日河流域土地利用类型以林地为主,面积占比高达63.18%。土地利用呈现耕地、草地和未利用地缩减,其余地类扩张的趋势。流域ESV呈增长趋势,累计增长4.56%(4.19亿元)。林地和气候调节分别为ESV贡献率最高的土地利用类型和生态系统服务功能,贡献率分别为81.30%和28.19%。总ESV和各项生态系统服务功能的ESV随海拔、坡度和地形起伏度增大呈先增后减的分布特征,坡向上分布较均匀。流域ESV空间分异受自然和经济因素的共同作用影响,其中农田生产潜力为主导因子(q=0.50);任意两两因子交互均会增强其空间分异。【结论】尼日河流域土地利用和ESV具有显著地形梯度分异特征,需采取因地制宜的用地开发模式,促进区域生态环境的可持续发展。【Objective】The paper aimed to study the terrain differentiation and driving factors of ecosystem service value(ESV) in the Niri River Basin, for providing theoretical support for regional ecological civilization construction and economic development.【Method】The high-precision land use types data from 2000 to 2021,the ESV assessment model and topographic gradient classification were used to analyze the spatiotemporal evolution and topographic gradient differentiation of ESV in the Niri River Basin.Additionally, Geodetector was used to explore the spatial differentiation's driving factors.【Result】From 2000 to 2021,the dominant land use type in the Niri River Basin was forest land, accounting for 63.18% of the area.The Basin exhibited a trend of reduction in cropland, grassland and unused land, with an expansion in other land classes.The Basin's ESV showed an increasing trend, with a cumulative growth of 4.56%(419 million yuan).Forest land and climate regulation were respectively the land use type and ecosystem service function with the highest contribution rates to ESV,accounting for 81.30% and 28.19% respectively.The total ESV and individual ecosystem service functions displayed a pattern of increase followed by a decrease with increasing altitude, slope and relief degree of land surface, while evenly distributed in aspect.The spatial differentiation of ESV in the Basin was influenced by both natural and economic factors, with agricultural production potential being the dominant factor(q=0.50);interactions between any two factors enhanced its spatial differentiation.【Conclusion】Land use and ESV in the Niri River Basin exhibit significant terrain gradient differentiation.It is necessary to adopt a land development model tailored to local conditions to promote sustainable development of regional ecological environment.

关 键 词：生态系统服务价值 地形梯度 空间分异 驱动因素 尼日河流域 

分 类 号：S17[农业科学—农业基础科学]