FAST宁静区生态系统服务时空分异特征及权衡/协同关系分析

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摘要基于InVEST与光能利用率模型(CASA)对2000-2020年间500m口径球面射电望远镜(FAST)宁静区植被净初级生产力(NPP),水源涵养,土壤保持,生境质量四项生态系统服务进行计算,分析其在不同尺度上的时空变化特征,识别其生态系统服务热点区域,采用权衡-协同指数和随机森林模型揭示四项生态系统服务间的权衡/协同作用关系和强度及其与驱动因子的关系.结果表明:(1)2000-2020年,FAST宁静区四项生态系统服务整体上呈增加趋势,其中NPP增加730.544gC/m²,水源涵养量增加5.925mm,生境质量得分上升0.007,土壤保持量增加0.295t/km².(2)圈层差异明显,其中核心区增加最快,服务功能最优;其次是边远区,生态有明显好转;最后是中间区,生态修复相对较慢.(3)土地利用类型中,林地和草地对研究区生态系统服务量的促进作用最大.(4)生态系统服务热点整体上由Ⅰ类和Ⅱ类热点区向非热点区,Ⅲ类热点区及Ⅳ类热点区转变.(5)区内的四项生态系统服务间关系整体以协同为主,且协同作用逐渐增强,在空间上水源涵养与土壤保持和NPP在部分地区呈权衡作用.(6) FAST宁静区四项生态系统服务间权衡/协同关系作用强度的主要驱动因子是降水,蒸散发,石漠化敏感性,坡度和人类活动强度.

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	权小丫
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关键词 ：生态系统服务, 圈层差异, 时空演变, 权衡协同, InVEST模型, 500m口径球面射电望远镜宁静区

Abstract：Based on the InVEST and CASA models, an assessment was conducted on four ecosystem services—Net Primary Productivity (NPP), water conservation, soil retention, and habitat quality in the FAST Tranquility Zone from 2000 to 2020. This involved calculating these services, analyzing their spatiotemporal variations at different scales, identifying hotspots of ecosystem services, and using tradeoff-synergy index and Random Forest models to reveal the relationships and intensities of tradeoff/synergy among these services and with their driving factors. The results showed that: (1) From 2000 to 2020, the overall ecosystem services in the FAST Tranquility Zone demonstrated an increasing trend, with NPP rising by 730.544gC/m², water conservation by 5.925mm, habitat quality score by 0.007, and soil conservation by 0.295t/km². (2) There were notable differences among the circles; the core area showed the fastest increase and had the best service functionality, followed by the remote areas with significant ecological improvement, and lastly the middle area where ecological restoration was relatively slow. (3) Among land use types, woodland and grasslands had the greatest promotional effect on the ecosystem services in the study area. (4) Overall, the ecosystem service hotspots transitioned from class I and II hotspots to non-hotspot areas, class III hotspots, and class IV hotspots. (5) The relationships among the four ecosystem services within the area were predominantly synergistic, with increasing synergy over time, and in some regions, tradeoff effects were evident between water conservation and both soil conservation and NPP. (6) The main driving factors for the tradeoff/synergy relationships among the four ecosystem services in the FAST Tranquility Zone were precipitation, evapotranspiration, sensitivity to rocky desertification, slope, and human activity intensity

Key words： ecosystem services circle differences spatio-temporal evolution tradeoff-synergy InVEST model FAST tranquility zone

收稿日期: 2024-02-29

PACS:

X171

基金资助:国家自然科学基金资助项目(42161052);贵州省科技计划(黔科合平台[2024]002)

通讯作者: 苏维词,研究员,suweici@sina.com E-mail: suweici@sina.com

作者简介: 权小丫(2000-),女,新疆巴州人,重庆师范大学硕士研究生,主要研究生态环境与区域经济发展.quan_yaya@163.com.

引用本文:

权小丫, 苏维词, 勾容, 黄贤凤. FAST宁静区生态系统服务时空分异特征及权衡/协同关系分析[J]. 中国环境科学, 2024, 44(9): 5145-5159. QUAN Xiao-ya, SU Wei-ci, GOU Rong, HUANG Xian-feng. Analysis on spatio-temporal distribution characteristics and tradeoff-synergy of ecosystem services in the FAST Tranquility Zone. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(9): 5145-5159.

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