[1]胡 实,占车生*,赵茹欣,等.横断山区植被绿度的时空变化特征及其成因[J].山地学报,2019,(05):669-680.[doi:10.16089/j.cnki.1008-2786.000458]
　HU Shi,ZHAN Chesheng*,ZHAO Ruxin,et al.Detecting Changes and Causes of Vegetation Greenness in the Hengduan Mountains Region, China[J].Mountain Research,2019,(05):669-680.[doi:10.16089/j.cnki.1008-2786.000458]
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横断山区植被绿度的时空变化特征及其成因()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2019年05期
页码:
669-680
栏目:
山地环境
出版日期:
2019-09-30

文章信息/Info

Title:
Detecting Changes and Causes of Vegetation Greenness in the Hengduan Mountains Region, China
文章编号:
1008-2786-(2019)5-669-12
作者:
胡 实1; 占车生1*; 赵茹欣2; 刘梁美子1; 3
1.中国科学院 地理科学与资源研究所 陆地水循环及地表过程重点实验室,北京 100101; 2. 北京师范大学 水科学研究院,北京 100875; 3.中国科学院大学,北京 100049
Author(s):
HU Shi1;  ZHAN Chesheng1*;  ZHAO Ruxin2;  LIU Liangmeizi1; 3
1. Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China; 2. Beijing Normal University, College of Water Sciences, Beijing 100875, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China
关键词:
横断山区;  偏相关分析;  复相关分析;  均一化植被指数
Keywords:
Hengduan Mountains Region;  partial correlation analysis;  multiple correlation analysis;  NDVI
分类号:
K903~A
DOI:
10.16089/j.cnki.1008-2786.000458
摘要:
科学认识植被绿度变化的时空格局及驱动因子是生态系统管理的基础。横断山是我国西南地区的重要生态屏障,对我国中西部地区的气候及生态环境有着深远影响。本文基于MODIS NDVI数据,采用趋势分析法、偏相关分析及复相关分析等方法,系统分析了2001-2016 年横断山区植被NDVI的变化特征及其驱动因子。研究结果显示:2001-2016年横断山区NDVI年均值呈增加趋势,年均增长率为4.4×10-4 a-1。除夏季NDVI均值表现为降低趋势外,其它季节NDVI均值均为增长趋势,增速冬季>春季>秋季。海拔4000 m以下植被NDVI年均值介于0.45～0.55,其增速的海拔梯度差异较小(±0.001 a-1); 海拔4000 m以上随海拔梯度的增加,NDVI年均值降低而其增速升高。横断山区植被 NDVI 变化受气候因子影响的面积仅为16%,大部分地区NDVI变化受CO2浓度增加及土地利用变化等人类活动的影响。研究结果为横断山区生态保护和可持续发展提供参考依据。
Abstract:
Attributing variation of vegetation greenness to climate change and human activities is important, because it provide fundamental information for ecosystem management. The Hengduan Mountains is an essential ecological barrier for southwestern China, and exerts profound influences on the climate and ecological environment of Midwestern China. Based on the Normalized Difference Vegetation Index(NDVI)data, the spatial-temporal variation of vegetation greenness from 2001 to 2016 was detected in Hengduan Mountains Region. With the aid of partial correlation analysis and multiple correlation analysis, NDVI variation was attributed to climate change and human activities. Results showed that regional averaged annual NDVI increased from 2001 to 2016, with an averaged increasing rate of 4.4×10-4a-1. Except for summer, the seasonal averaged NDVI showed increasing trend. The highest increasing rate was found in winter, followed by those in spring and autumn. Below 4000 m, averaged annual NDVI ranged from 0.45 to 0.55, with interannual change rate between ±0.001·a-1, indicating there was slight difference in interannual variation of NDVI along altitude. Above the altitude of 4000 m, annual NDVI decreased with the altitude, whereas the interannual increasing rate of NDVI increased with altitude. The partial correlation analysis and multiple correlation analysis showed that NDVI variation principally controlled by the variation of precipitation and temperature in 16% areas of Hengduan Mountains Region, whereas human activities, such as carbon dioxide enrichment and land use change, were the dominant factors impact NDVI variation in most study area. This study can provide scientific reference for ecological protection and sustainable development in Hengduan Mountains Region.

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备注/Memo

备注/Memo:
收稿日期(Received date):2019-05-08; 改回日期(Accepted date): 2019-10-15
基金项目(Foundation item):国家重点基础研究发展计划(973计划)项目(2015CB452701); 国家自然科学基金项目(41571019)。[ National Key Basic Research and Development Program of China(973 Program)(2015CB452701); National Natural Science Foundation of China(41571019)]
作者简介(Biography):胡实(1982-),女,湖北咸宁人,博士,助理研究员,主要从事生态水文研究。 [ HU Shi(1982- ), female, born in Xianning, Hubei province, Ph.D., research assistant, research on ecohydrology] E-mail: hus.08b@igsnrr.ac.cn
更新日期/Last Update: 2019-09-30