摘要
[目的]在经济快速发展与生态环境保护双重压力背景下,分析和揭示南流江流域生态系统服务权衡与协同关系及其热点区,对广西北部湾入海河流的可持续发展具有重要意义。[方法]基于遥感影像、DEM、气象、土壤、野外观测和调研结果等多源数据,综合InVEST模型、GIS、R语言和GeoDa软件等,定量测算和分析了2000—2020年南流江流域食物供给、固碳、生物多样性维持和土壤保持服务4种主要生态系统服务的时空分异特征及权衡/协同关系,辨识流域生态系统服务热点区。[结果]近20年间南流江流域食物供给服务不断下降,固碳服务、生物多样性维持和土壤保持服务总体呈增长趋势。2000—2020年流域食物供给服务与固碳服务、生物多样性维持和土壤保持服务均表现权衡关系,权衡关系不断增强,权衡集中区域主要分布在玉林市城乡结合部、以浦北县城为核心的小江流域中游地区。而固碳服务、生物多样性维持与土壤保持服务则表现出协同关系,且协同相对集中区域主要是南流江中游自然资源禀赋较好的乡镇,但协同关系呈现逐渐减弱的趋势。南流江流域生态系统服务热点区以固碳服务、生物多样性维持和土壤保持服务为主,主要分布在六万大山、勾头嶂山、云开大山、大容山等山林地和自然保护区。食物供给服务主导热点区分布在玉州平原、博白盆地和下游三角洲地区,固碳服务主导区域在大容山农林交错带,生物多样性维持服务主导热点区集中在自然保护区、山林岗地和丘陵地区。[结论]南流江流域生态系统服务变化总体呈上升趋势,各项生态系统服务权衡协同关系存在明显时空异质性,未来应在空间上促进生态系统服务协同发展,优化和保障流域生态空间。
[Objective]Nanliujiang River Basin(NRB)is a typical watershed of land-sea transition zone in Beibu Gulf Economic Zone of Guangxi,and the rapid economic development brought great pressure to the ecological environment.Trade-off and synergy of ecosystem services and their interrelated changes,hot spots in the NRB had great significance for the sustainable development in this economic area were quantitatively analyzed.[Methods]Based on multi-source data of remote sensing images,DEM,meteorology,soil,field observation and investigation,the InVEST model,GIS,R and GeoDa software were comprehensively used to calculate the four key ecosystem services of food supply(FS),carbon storage(CS),biodiversity maintenance(BM)and soil conservation(SC)from 2000 to 2020,and to analyze the spatialtemporal characteristics and their inter-related changes of trade-off and synergy between ecosystem services.The spatial heterogeneity and hot spots of ecosystem services at the town scale were explored.[Results]Food supply decreased,CS,BM and SC increased in general.The FS with the CS,BM and SC were trade-offs relationships,and their trade-offs relationships were increasing during the period of 2000—2020,while the relationship between adjustment services(CS and SC)and support service(BM)was synergistic,and showed the trend of weakening gradually.The areas with high trad-off intensity between the FS-BM and FS-CS mainly concentrated in the urban-rural fringe area of Yulin City,farming area and river valley of Xiaojiang in Pubei county.The high intensity of synergistic among CS,BM and SC concentrated in forest areas of the middle reaches in the NRB with high vegetation coverage.Moreover,the hot spots of ecosystem services mainly distributed in mountain forest areas and nature reserves,while the high-value clusters of food supply services were mainly located in the Yuzhou Plain,Bobai Basin and the lower reaches of the Delta with frequent human activities.The hot-spot areas of primary biodiversity maintenance service services were mainly located in nature reserves,forests area in the mountain and hills,while the hot-spot areas distribution of SC concentrated in the ecotones of agriculture and forestry in the low Darong mountain.[Conclusion]The overall change of ecosystem service in the NRB was on an upward trend,and the trade-off and synergistic relationship between different ecosystem services had obvious spatial heterogeneity.In the future,synergistic development of ES should be promoted spatially for optimizing and ensuring the ecological space.
作者
罗金玲
谢余初
刘秋华
童凯
胡宝清
LUO Jinling;XIE Yuchu;LIU Qiuhua;TONG Kai;HU Baoqing(Key Laboratory of Environment Change and Resources Use in Beibu Gulf,Ministry of Education,Nanning Normal University,Nanning 530001,China;Key Laboratory of Earth Surface Process and Intelligent Simulation,School of Geography and Planning,Nanning Normal University,Nanning 530001,China;Huanjiang Observation and Research Station for Karst Ecosystems,CAS,Huanjiang,Guangxi 547100,China)
出处
《水土保持研究》
CSCD
北大核心
2023年第5期397-407,共11页
Research of Soil and Water Conservation
基金
国家自然科学基金项目(41761039,42071135)
广西科技基地与人才专项(桂AD19110142,桂AD20238046)。
关键词
生态系统服务
时空变化
权衡
热点区
南流江流域
ecosystem service
temporal and spatial variation
trade offs
hot-spots
Nanliujiang River Basin
