湖北省植被净初级生产力的时空变化及对气象因子的响应  

Spatial and Temporal Changes in Net Primary Productivity of Vegetation and Its Response to Meteorological Factors in Hubei Province

作　　者：潘炳臣 宋鄂平 李万阳 梁小龙 李陈 王钰鑫 Pan Bingchen;Song EPing;Li Wanyang;Liang Xiaolong;Li Chen;Wang Yuxin(College of Forestry and Horticulture,Hubei University for Nationalities,Enshi 445000;Hubei Provincial Key Laboratory of Biological Resources Conservation and Utilization,Enshi 445000)

机构地区：[1]湖北民族大学林学园艺学院,恩施445000 [2]生物资源保护与利用湖北省重点实验室,恩施445000

出　　处：《湖北林业科技》2025年第1期29-35,共7页Hubei Forestry Science and Technology

基　　金：湖北民族大学科研项目“碳酸盐岩溶蚀作用碳汇通量测算”(XN2320)。

摘　　要：探明湖北省植被净初级生产力(NPP)的时空变化规律及其对气象因子的响应,对于理解湖北省植被生态功能变化、精准评估湖北省生态系统碳源/碳汇具有重要现实意义。本研究基于MOD17A3 HGF遥感数据以及气象数据,运用Slope趋势分析、相关性分析,分析湖北省2001—2022年NPP的时空变化特征及其气象因子的影响作用。结果表明:(1)2001—2022年,湖北省年平均NPP为555.31 g C·m^(-2),2015年最高,2001年最低;(2)从时间维度上看,总体上呈缓慢增长趋势,从空间维度上看,湖北省NPP的空间分布差异明显,湖北省NPP呈西部高、中部东部低,整体上年均NPP表现出由西北向东南递减的趋势;(3)湖北省NPP与降水的相关性显著强于与气温的相关性,湖北省NPP与年降水呈正相关性的区域面积占总面积的89.67%,湖北省NPP与年气温呈正相关性的区域面积占总面积的62.97%。总体上看,湖北省NPP存在明显的时空分异特征,气温对NPP的时空分布格局影响不大,降水对NPP的时空分布格局具有重要影响。Exploring the spatial and temporal variation patterns of vegetation net primary productivity(NPP)and its response to meteorological factors is of great significance for understanding the changes of vegetation ecological functions and accurately assessing the carbon sources and sinks of the ecosystems in Hubei Province.In this study,based on MOD17A3HGF remote sensing data and meteorological data,Slope trend analysis and correlation analysis were applied to analyse the spatial and temporal characteristics of NPP in Hubei Province from 2001 to 2022 and the influence of meteorological factors.The results showed that:(1)From 2001 to 2022,the annual average NPP in Hubei Province was 555.31 g C·m^(-2),with the highest in 2015 and the lowest in 2001.(2)In the temporal dimension,there was a general trend of slow growth.In the spatial dimension,the spatial distribution of NPP in Hubei Province varied significantly,with NPP in Hubei Province being high in the west and low in the central-eastern part of the province,and overall the annual mean NPP showed a decreasing trend from northwest to southeast.(3)The correlation between NPP and precipitation in Hubei Province was significantly stronger than that with air temperature,and the area of Hubei Province where NPP was positively correlated with annual precipitation accounts for 89.67%of the total area,while the area of Hubei Province where NPP was positively correlated with annual air temperature accounts for 62.97%of the total area.Overall,there are obvious spatial and temporal differentiation characteristics of NPP in Hubei Province,and air temperature has little influence on the spatial and temporal distribution pattern of NPP,while precipitation has an important influence on the spatial and temporal distribution pattern of NPP.

关 键 词：NPP 时空变化 气象因子 湖北省 

分 类 号：Q948.1[生物学—植物学]