气候因子对南疆三地州植被净初级生产力演变特征的影响  

The Impact of Climate Factors on The Evolution Characteristics of Net Primary Productivity of Vegetation in The Three Prefectures in Southern Xinjiang

作　　者：庞朝悦 刘玉婷 张齐飞 阿依努尔·买买提 Pang Zhaoyue;Liu Yuting;Zhang Qifei;Ayinuer·Maimaiti(Kashi University,Kashi 844000,P.R.China;Shanxi Normal University;Aerospace Information Research Institute,Chinese Academy of Science)

机构地区：[1]喀什大学,喀什844000 [2]山西师范大学 [3]中国科学院空天信息创新研究院

出　　处：《东北林业大学学报》2024年第3期82-89,140,共9页Journal of Northeast Forestry University

基　　金：新疆维吾尔自治区科技计划项目(2021D01B05);新疆维吾尔自治区高校科研计划项目(XJEDU2020Y035);喀什大学高层次人才培养项目(GCC18ZK-008)。

摘　　要：以新疆南疆三地州为例,采用多种遥感卫星数据,估算研究区植被覆盖度和植被净初级生产力,分析研究区2001—2020年植被生态系统时空演变特征,通过使用泰尔-森中值趋势分析法(Theil-Sen Median)和曼-肯德尔(Mann-Kendall)显著性检验法相结合的方法定量分析植被净初级生产力未来的变化趋势,逐像元计算气候因子与植被净初级生产力的相关系数。结果表明:(1)南疆三地州中喀什地区植被净初级生产力(NPP)指数最强,年均值在4~6 g/m~2范围内波动,和田地区植被净初级生产力指数最弱,年均值在1.6~2.7 g/m~2范围内波动。(2)研究区近20 a植被净初级生产力显著增加面积占研究区总面积的10.18%,主要分布在喀什地区和克孜勒苏柯尔克孜自治州,显著减少面积占总面积的54.85%,主要分布在和田地区,植被净初级生产力未来有持续下降趋势。(3)植被净初级生产力与年均温度呈正相关性的分布面积占总面积的43.7%,与年均降水呈正相关性的分布面积占总面积的50.3%,表明研究区植被净初级生产力与降水相关性强于气温。Taking the three southern prefectures of Xinjiang as an example,multiple remote sensing satellite data was used to estimate the vegetation coverage and net primary productivity of the study area.The spatiotemporal evolution characteristics of vegetation ecosystems in the study area from 2001 to 2020 were analyzed.The future trend of changes in vegetation net primary productivity was quantitatively analyzed using the Theil-Sen Median trend analysis method and the Mann-Kendall significance test method.The correlation coefficient between climate factors and vegetation net primary productivity was calculated on a pixel-by-pixel basis.The results showed that:(1) The vegetation net primary productivity(NPP) index in the Kashgar region of the three southern prefectures of Xinjiang was the highest,with an average annual value fluctuating within the range of 4~6 g/m~2,while the vegetation net primary productivity index in Hotan region was the weakest,with an annual average fluctuating within the range of 1.6~2.7 g/m~2.(2) The area with a significant increase in vegetation net primary productivity in the study area over the past 20 years accounted for 10.18% of the total area,mainly distributed in Kashgar Prefecture and Kizilsu Kirghiz Autonomous Prefecture,while the area with a significant decrease in vegetation net primary productivity accounted for 54.85% of the total area,mainly distributed in Hotan Prefecture.The vegetation net primary productivity is expected to continue declining in the future.(3) The area with a positive correlation between vegetation net primary productivity and annual average temperature accounted for 43.7% of the total area,while the area with a positive correlation between vegetation net primary productivity and annual precipitation accounted for 50.3% of the total area,indicating that the correlation between vegetation net primary productivity and precipitation is stronger than that with temperature in the study area.

关 键 词：植被生态系统 植被净初级生产力 气候因子 

分 类 号：Q948[生物学—植物学]