内蒙古阴山北麓草原植被净初级生产力变化特征及其气候驱动力  

Characteristics of vegetation net primary productivity change and its climatic driving forces in the Yinshanbeilu Steppe,Inner Mongolia

作　　者：范毅宁 廖梓龙[3,4] 龙胤慧[3,4] 程瑶[1,2] FAN Yining;LIAO Zilong;LONG Yinhui;CHENG Yao(School of Water Conservancy and Hydroelectric Power,Hebei University of Engineering,Handan 056038,Hebei,China;Hebei Key Laboratory of Intelligent Water Conservancy,Hebei University of Engineering,Handan 056038,Hebei,China;Institute of Water Resources for Pastoral Area Ministry of Water Resources,Hohhot 010020,Inner Mongolia,China;Yinshanbeilu National Field Research Station of Steppe Eco-hydrological System,China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]河北工程大学水利水电学院,河北邯郸056038 [2]河北工程大学河北省智慧水利重点实验室,河北邯郸056038 [3]水利部牧区水利科学研究所,内蒙古呼和浩特010020 [4]中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站,北京100038

出　　处：《水利水电技术（中英文）》2024年第8期38-50,共13页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金项目(52179019);内蒙古自治区科技计划项目(2022YFHH0024)。

摘　　要：【目的】研究阴山北麓草原植被净初级生产力的时空变化特征,揭示气候、地形因子对植被NPP变化的影响,为内蒙古草原生态保护与可持续发展提供理论基础。【方法】基于MODIS NPP,气象及DEM数据,采用Theil-Sen Median趋势分析、M-K突变、地理探测器以及Person相关分析等方法,阐明阴山北麓草原植被NPP的变化特征,并识别植被NPP的驱动因子。【结果】2001—2022年,阴山北麓草原植被NPP年均增加2.784 gC m-2a-1,增长速度较快的区域分布在东部及南部。植被NPP变化受降水、日照时数、最低气温、最高气温、地形等因子共同驱动。降水增加促进了植被NPP的增长,相关系数为0.639;最高气温与最低气温与植被NPP均呈轻微负相关,相关系数分别为-0.162、-0.051。【结论】阴山北麓草原植被NPP整体呈显著增加趋势,地形因子对植被NPP的驱动力不强,降水是植被NPP的主要驱动因子,降水与日照时数、最高气温、最低气温的交互作用显著影响植被NPP变化。[Objective]The spatiotemporal variation characteristics of net primary productivity(NPP)of vegetation in Yinshanbeilu steppe are studied,and the effects of climate and topographic factors on the changes in vegetation NPP are analysed,aiming to provide a theoretical basis for the ecological protection and sustainable development of steppe in Inner Mongolia.[Methods]Based on MODIS NPP,meteorological,and DEM,the change characteristics of vegetation NPP and its driving factors in Yinshanbeilu steppe were analysed and identified by using Theil-Sen Median trend analysis,M-K mutation analysis,geographical detector,and Pearson correlation analysis.[Results]From 2001 to 2022,there was an average annual increase of 2.784 gC m-2a-1 in the net primary productivity(NPP)of vegetation in Yinshanbeilu steppe,and the eastern and southern parts are increasing more rapid than other zone of the study area.Precipitation,sunshine duration,minimum temperature,maximum temperature and topographic are the driven forces to the changes in vegetation NPP.An increase in precipitation promoted in the growth of vegetation NPP,with a correlation coefficient of 0.639.The maximum and minimum temperatures were found to be slightly negatively correlated with vegetation NPP,with correlation coefficients of-0.162 and-0.051,respectively.[Conclusion]The net primary productivity(NPP)of vegetation in Yinshanbeilu steppe exhibited a significant overall increasing trend,topographic factors were found to exert a weak driving force on vegetation NPP,and the main driving factor is precipitation.The interaction between precipitation and sunshine duration,maximum temperature,and minimum temperature was found to affect the changes in vegetation NPP significantly.

关 键 词：植被NPP 驱动力 地理探测器 阴山北麓草原 影响因素 降水 气候变化 时空变化 

分 类 号：TV212[水利工程—水文学及水资源]