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生态学杂志 ›› 2021, Vol. 40 ›› Issue (9): 2967-2977.doi: 10.13292/j.1000-4890.202109.025

• 研究报告 • 上一篇    下一篇

成渝经济圈2000—2018年植被NDVI的动态变化

李茜荣,杨东*,冯磊,黄悦悦,易唯   

  1. (西北师范大学地理与环境科学学院, 兰州 730070)  
  • 出版日期:2021-09-10 发布日期:2021-09-18

Dynamics of vegetation NDVI in Chengdu-Chongqing Economic Circle from 2000 to 2018.

LI Xi-rong, YANG Dong*, FENG Lei, HUANG Yue-yue, YI Wei     

  1. (College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China).
  • Online:2021-09-10 Published:2021-09-18

摘要: 利用成渝经济圈2000—2018年的MODIS NDVI遥感数据对植被覆盖状况进行分析,并结合同期研究区内气象站点气温、降水等气候指标,分析该地区NDVI的时空变化特征及气候对其影响。结果表明,2000—2018年成渝经济圈植被NDVI呈现出显著增加的趋势,空间地域差异性明显:植被退化区域主要集中在成渝经济圈西北部及东南部,改善区主要分布在南部及东部;年NDVI与平均气温呈负相关性,与降水呈正相关性;人类活动对植被覆盖的影响同样不可忽视,人类活动促进植被改善,植被趋好状态的地区占总面积的95.33%,但在未来,61.66%的区域存在植被由改善变退化的趋势。

 

关键词: 成渝经济圈, NDVI, 动态变化, 气候因子, 人类活动

Abstract: The status of vegetation coverage was analyzed using the MODIS NDVI remote sensing data of the Chengdu-Chongqing Economic Circle from 2000 to 2018. Combined with the climatic indices (temperature and precipitation) from the meteorological stations in the study area, the spatiotemporal variations of NDVI and the influence of climate on NDVI were analyzed. The results showed that the NDVI of vegetation in the Chengdu-Chongqing Economic Circle presented a significant enhancement from 2000 to 2018, with substantial spatial variations. The areas with vegetation degradation were mainly concentrated in the northwest and southeast of the Chengdu-Chongqing Economic Circle, and areas with improvement were mainly distributed in the south and east. The annual NDVI was negatively correlated with mean annual temperature and positively correlated with precipitation. The impact of human activities on vegetation coverage cannot be ignored. Human activities improved vegetation, and areas with improved vegetation accounted for 95.33% of the total area. However, 61.66% of the region would have a trend of vegetation degeneration from improvement in the future.

Key words: Chengdu-Chongqing Economic Circle, NDVI, dynamic change, climate factor, human activity.