人工灌丛总初级生产力和蒸散对气候变化的响应模拟——以宁夏盐池县荒漠草原区为例  

Simulation of GPP and ET response to climate change for the planted shrub ecosystem in desert steppe area of Yanchi county,Ningxia

作　　者：袁洪艺 杜灵通[1,2] 乔成龙 王玉霞 薛斌 魏采用 周峰 李明涛 YUAN Hongyi;DU Lingtong;QIAO Chenglong;WANG Yuxia;XUE Bin;WEI Caiyong;ZHOU Feng;LI Mingtao(Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China,Ningxia University,Yinchuan 750021,China;Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwest China of Ministry of Education,Ningxia University,Yinchuan 750021,China;Ningxia Institute of Remote Sensing Survey,Yinchuan 750021,China;Ningxia Institute of Geological and Mineral Resources Survey,Yinchuan 750021,China)

机构地区：[1]宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,银川750021 [2]宁夏大学西北退化生态系统恢复与重建教育部重点实验室,银川750021 [3]宁夏回族自治区遥感调查院,银川750021 [4]宁夏回族自治区矿产地质调查院,银川750021

出　　处：《生态学报》2024年第8期3515-3524,共10页Acta Ecologica Sinica

基　　金：宁夏自然科学基金重点项目(2022AAC02011);国家自然科学基金项目(41967027);宁夏地质局财政项目(NXCZ20220203)。

摘　　要：荒漠草原区人工灌丛生态系统的总初级生产力(GPP)和蒸散(ET)如何响应全球气候变化,不仅是全球变化生态学研究的核心问题,也关乎干旱半干旱风沙区生态建设的可持续性。利用参数优化后的生物群区生物地球化学循环(Biome⁃BGC)模型和气象环境驱动数据,考虑不同气候变化情景和未来趋势,模拟了盐池荒漠草原区人工灌丛生态系统GPP和ET对气候变化的响应。结果表明:(1)增温会显著抑制生态系统的GPP,大幅度的增温(3℃)会导致GPP急剧下降,但增温对ET的抑制作用非常微弱;(2)降水是限制ET变化的重要因素,相对于增温诱发干旱胁迫所引起的ET小幅下降,降水多寡则更直接地控制着生态系统的ET大小;(3)中国西北地区未来气候的“暖湿化”趋势和大气CO_(2)浓度升高会对荒漠草原区人工灌丛生态系统产生综合驱动效应,增强陆地和大气间的碳水交换通量。研究成果可为干旱半干旱区应对全球变化及指导地方政府制定生态保护修复政策提供科学依据。How the gross primary productivity(GPP)and evapotranspiration(ET)of the planted shrub ecosystem in desert steppe areas responds to global climate change is not only a key scientific problem of global change ecology,but also relates to the sustainability of regional ecological restoration in arid and semi⁃arid areas.Considering different climate change scenarios and future trends,this study used meteorological and environmental data to drive the Biome⁃BGC model.The response of GPP and ET of the planted shrub ecosystem in the desert steppe area of Yanchi county to climate change was studied.The results show that:(1)air temperature rising significantly inhibits the GPP of the ecosystem.High⁃intensity warming(3℃)leads to a sharp decline in GPP,but the inhibitory effect of warming on ET is very weak.(2)Precipitation is a critical factor limiting the change of ET.Compared with the decrease of ET caused by drought stress under regional warming,the amount of precipitation controls the ET′s magnitude of the ecosystem more directly.(3)The warm and humid climate and the increase of atmospheric CO_(2)concentration in the future will have comprehensive effects on the ecosystem and ultimately promote the flux of carbon and water between land and atmosphere.The research can provide a scientific basis for human to adapt to global changes in arid and semi⁃arid areas and for local governments to implement ecological protection and restoration policies.

关 键 词：人工灌丛生态系统 生物群区生物地球化学循环(Biome⁃BGC)模型 总初级生产力 蒸散 气候变化 盐池县 

分 类 号：Q14[生物学—生态学]