基于多源地理数据的西南高山峡谷区生态系统服务评估及权衡与协同关系  

Evaluation of Ecosystem Services and Tradeoff and Synergy in the Alpine and Canyon Region of Southwest China Based on Multi-source Geographic Data

作　　者：刘静[1] 项嘉仪 张东海 兰梦瑶 关颖慧 LIU Jing;XIANG Jiayi;ZHANG Donghai;LAN Mengyao;GUAN Yinghui(School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China)

机构地区：[1]北京林业大学水土保持学院,北京100083

出　　处：《水土保持学报》2024年第6期214-223,共10页Journal of Soil and Water Conservation

基　　金：国家重点研发计划项目(2022YFF1302905,2022YFF1302900)。

摘　　要：[目的]西南高山峡谷区是国家“三区四带”重要生态安全屏障,对保障国家生态安全和区域高质量发展具有重要作用,但目前尚不明确该区生态系统服务及其权衡与协同关系。[方法]基于InVEST模型、RUSLE模型和WR指数,结合多源地理数据集,系统评估了西南高山峡谷区2000—2020年3种典型生态系统服务,并揭示其权衡与协同关系。[结果](1)2000—2020年,西南高山峡谷区固碳和水源涵养服务稳步提升,年均固碳服务由1927 g/(m^(2)·a)增加到1985 g/(m^(2)·a),WR指数从0.062升至0.067。空间上固碳从西北向东南逐渐递增,水源涵养呈较强的空间异质性;土壤保持服务整体处于恶化态势,从263.50 t/(km^(2)·a)降至226.25 t/(km^(2)·a),其中滇西北高山峡谷生态维护区降幅达27.50%。(2)2000—2020年,生态系统服务热点区面积占比增加5.41%,整体呈“一类热点区>非热点区>二类热点区>三类热点区”的分布规律。(3)固碳服务与水源涵养服务、固碳服务与土壤保持服务整体表现为协同关系,协同关系面积占比分别为54.91%,44.46%,主要位于藏东南高寒高山峡谷生态维护区和藏东_川西高山峡谷生态维护水源涵养区;水源涵养服务与土壤保持服务整体表现为权衡关系,协同关系面积占比仅为20.14%。[结论]研究结果可为西南高山峡谷区科学制定和实施生态保护政策,优化资源管理策略提供必要参考。[Objective]The alpine and canyon region of Southwest China is a crucial ecological security barrier within the national“Three Zones and Four Belts”strategy,and it plays an essential role in ensuring national ecological security and promoting regional high-quality development.However,the ecosystem services and their trade-offs and synergies in this area remain unclear.[Methods]Three typical ecosystem services in the alpine and canyon region of southwest China from^(2)000 to 2020 were systematically evaluated using the InVEST model,RUSLE model,and WR index,in combination with multi-source geographic datasets.[Results](1)From^(2)000 to 2020,carbon sequestration and water retention services in the alpine and canyon region of southwest China were steadily improved,with annual carbon sequestration increasing from 1927 g/(m^(2)·a)to 1985 g/(m^(2)·a),and the WR index rising from 0.062 to 0.067.Spatially,carbon sequestration gradually increased from northwest to southeast,while water retention exhibited strong spatial heterogeneity.In contrast,soil retention services was overall deteriorated,decreasing from^(2)63.50 t/(km^(2)·a)to 226.25 t/(km^(2)·a),with a reduction of 27.50%in the northwest Yunnan alpine canyon ecological maintenance zone.(2)The proportion of the area of ecosystem service hotspot areas increased by 5.41%,following a distribution pattern of the first-class hotspot areas>the non-hot spot areas>the second-class hotspot areas>the third-class hotspot areas form^(2)000 to 2020.(3)Carbon sequestration services exhibited a synergistic relationship with both water retention services and soil retention services,with synergy areas accounting for 54.91%and 44.46%of the total area,respectively.These synergies were mainly located in the southeastern Tibetan alpine canyon ecological maintenance zone and the eastern Tibetan-western Sichuan alpine canyon ecological maintenance and water retention zone.However,water retention and soil retention services displayed a trade-off relationship,with the synergy area acc

关 键 词：西南高山峡谷区 生态系统服务 权衡 协同 

分 类 号：K903[历史地理—人文地理学]