近20年太行山-燕山植被生态指数时空动态及其驱动因素  

Spatio-temporal dynamics of vegetation ecological index and its driving factors in Taihangshan-Yanshan Mountains in the last 20 years

作　　者：陈雨琦 闫丰 王澜颖 尹海魁 王文迪 王佳莹 陈亚恒 许皞[1,2] CHEN Yuqi;YAN Feng;WANG Lanying;YIN Haikui;WANG Wendi;WANG Jiaying;CHEN Yaheng;XU Hao(College of Resource and Environmental Sciences,Hebei Agricultural University,Baoding 071000,China;College of Land and Resources,Hebei Agricultural University,Baoding 071000,China;College of Water Resources and Hydropower,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]河北农业大学资源与环境科学学院,保定071000 [2]河北农业大学国土资源学院,保定071000 [3]河北工程大学水利水电学院,邯郸056038

出　　处：《生态学报》2024年第18期8283-8293,共11页Acta Ecologica Sinica

基　　金：河北省社会科学基金项目(HB23YJ008)。

摘　　要：为掌握太行山-燕山综合区植被生态状况,创新性地构建了既能反映植被生产力又能反映植被覆盖度的植被生态指数(Vegetation Ecology Index,VEI)。选取2003—2021年的GEE云平台(Google Earth Engine)数据,采用Slope趋势分析、变异系数和相关性分析等方法,研究了植被VEI时空变化特征,分析了气温、降水等气候因素对植被VEI变化的影响。结果表明:(1)2003—2021年太行山-燕山植被VEI多年平均值为0.526,整体呈现自北部向其他方向蔓延减少的趋势,其分布规律与海拔分布具有一定的相关性;(2)2003—2021年,研究区VEI整体呈下降趋势,速率为0.0017/a,增加区域仅为36.71%;(3)研究年限内植被VEI呈现稳定性变化的区域约为76.96%,整体处于较稳定状况;(4)年均气温较年均降水来说对研究区VEI的影响更显著。研究结果将对太行山-燕山生态环境状况评估、资源合理配置、区域环境与社会经济发展战略的制定等具有重要的理论价值和现实意义。In order to gain a comprehensive understanding of the vegetation ecological status of the Taihangshan-Yanshan Mountains Integrated Area in China,this study constructed an innovative Vegetation Ecology Index(VEI)that reflects both vegetation productivity and vegetation cover.This index has immeasurable guiding significance for measuring the superior and inferior status of the ecological environment.In this study,data from the Google Earth Engine(GEE)cloud platform was selected for analysis,covering the period from 2003 to 2021.This was done in order to gain a deeper understanding of the spatial and temporal change characteristics of the Vegetation Ecology Index(VEI).In order to study the changing law of the vegetation ecological index,a number of analytical techniques were applied,including slope trend analysis,coefficient of variation analysis and correlation analysis.These methods facilitate the revelation of the temporal and spatial patterns of vegetation VEI change.It was found that the vegetation VEI exhibits certain temporal and spatial change patterns within the Taihangshan-Yanshan Mountains Integrated Area.On this basis,the effects of climatic factors such as temperature and precipitation on the changes of vegetation VEI were further analysed.The results show that:(1)Between 2003 and 2021,the multi-year average value of the vegetation ecological index in the Taihangshan-Yanshan Mountains region of China reached 0.526.In general,the vegetation ecological index shows a trend of gradual decrease from the north to other directions.This distribution pattern is correlated with the altitude distribution.(2)During the period from 2003 to 2021,the vegetation ecological index of the study area showed an overall decreasing trend,with an average annual decrease rate of approximately 0.0017 per year.During this period,only 36.71%of the areas exhibited an increase in the vegetation ecological index.(3)During the study years,approximately 76.96%of the areas exhibited a stable change in the vegetation ecological index,wit

关 键 词：植被覆盖度 植被净初级生产力 植被生态指数 谷歌地球引擎 太行山-燕山 

分 类 号：Q948[生物学—植物学]