2000-2014年秦巴山区植被覆盖时空变化特征及其归因（英文）

编号 zgly0001584302

文献类型 期刊论文

文献题名 2000-2014年秦巴山区植被覆盖时空变化特征及其归因（英文）

作者 刘宪锋  朱秀芳  潘耀忠  李双双  马钰琪  聂娟 

作者单位 StateKeyLaboratoryofEarthSurfaceProcessesandResourceEcology  BeijingNormalUniversity  CollegeofResourcesScience&Technology  BeijingNormalUniversity  AcademyofDisasterReductionandEmergencyManagement  BeijingNormalUniversity  National 

母体文献 Journal of Geographical Sciences 

年卷期 2016年01期

年份 2016 

分类号 Q948 

关键词 vegetationcoverage  spatiotemporalvariation  attributionanalysis  ENSO  Qinling-Daba(Qinba)Mountains 

文摘内容 Using the Moderate Resolution Imaging Spectroradiometer-normalized difference vegetation index(NDVI) dataset,we investigated the patterns of spatiotemporal variation in vegetation coverage and its associated driving forces in the Qinling-Daba(Qinba) Mountains in 2000–2014.The Sen and Mann–Kendall models and partial correlation analysis were used to analyze the data,followed by calculation of the Hurst index to analyze future trends in vegetation coverage.The results of the study showed that(1) NDVI of the study area exhibited a significant increase in 2000–2014(linear tendency,2.8%/10a).During this period,a stable increase was detected before 2010(linear tendency,4.32%/10a),followed by a sharp decline after 2010(linear tendency,–6.59%/10a).(2) Spatially,vegetation cover showed a high in the middle and a low in the surroundings pattern.High values of vegetation coverage were mainly found in the Qinba Mountains of Shaanxi Province.(3) The area with improved vegetation coverage was larger than the degraded area,being 81.32% and 18.68%,respectively,during the study period.Piecewise analysis revealed that 71.61% of the total study area showed a decreasing trend in vegetation coverage in 2010–2014.(4) Reverse characteristics of vegetation coverage change were stronger than the same characteristics on the Qinba Mountains.About 46.89% of the entire study area is predicted to decrease in the future,while 34.44% of the total area will follow a continuously increasing trend.(5) The change of vegetation coverage was mainly attributed to the deficit in precipitation.Moreover,vegetation coverage during La Nina years was higher than that during El Nino years.(6) Human activities can induce ambiguous effects on vegetation coverage: both positive effects(through implementation of ecological restoration projects) and negative effects(through urbanization) were observed.