生态学杂志2024，Vol.43Issue(6)：1851-1858,8.DOI:10.13292/j.1000-4890.202406.004
可可西里自然保护区气候变化对植被特征的影响
The impact of climate change on vegetation characteristics in Hoh Xil Nature Reserve
摘要
Abstract
Based on the GIMMS NDVI and MODIS NDVI datasets,we constructed a long-term GIMMS-MODIS NDVI dataset of 1982-2020 in Hoh Xil with a simple linear regression model.We analyzed the temporal and spatial variations of NDVI by adopting trend analysis,significance test,and correlation analysis,and analyzed the respon-ses of NDVI to temperature and precipitation based on pixel scale.The results showed that the average annual tem-perature and precipitation showed a significant rising trend in Hoh Xil from 1982 to 2020,with a rising rate of 0.06℃·a-1 and 5.59 mm·a-1,respectively.The NDVI increased gradually from northwest to southeast of Hoh Xil during 1982-2020.The NDVI value was the largest and varied most obviously in summer,while it was the smallest and tended to be stable in winter.The annual average NDVI showed a non-significant positive correlation with the average annual temperature.At the pixel scale,the correlations between NDVI and temperature were predominantly positively,surpassing that between NDVI and precipitation.The correlation was the strongest in autumn.The impact of temperature on NDVI outweighed that of precipitation.关键词
可可西里自然保护区/GIMMS NDVI/MOD13A3/温度/降水量Key words
Hoh Xil Natural Reserve/GIMMS NDVI/MOD13A3/temperature/precipitation引用本文复制引用
李秀萍,郝仕龙,姚瑞晨,张岩..可可西里自然保护区气候变化对植被特征的影响[J].生态学杂志,2024,43(6):1851-1858,8.基金项目
水利部黄土高原水土流失过程与控制重点实验室开放课题基金资助项目(201603)和河南省科技攻关项目(222102320281)资助. （201603）
