[1]李星媚,严军*. 基于GEE和PLSR的2001-2020年长三角地区植被覆盖时空变化及驱动力分析[J].西北林学院学报,2023,38(6):219-227.[doi:10.3969/j.issn.1001-7461.2023.06.29]
　LI Xing-mei,YAN Jun*. Spatiotemporal Variation and Driving Force Analysis of Vegetation Cover in the Yangtze River Delta Based on GEE and PLSR During 2001-2020[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2023,38(6):219-227.[doi:10.3969/j.issn.1001-7461.2023.06.29]
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 基于GEE和PLSR的2001-2020年长三角地区植被覆盖时空变化及驱动力分析()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第38卷
期数:
2023年第6期
页码:
219-227
栏目:
出版日期:
2023-11-30

文章信息/Info

Title:
 Spatiotemporal Variation and Driving Force Analysis of Vegetation Cover in the Yangtze River Delta Based on GEE and PLSR During 2001-2020
文章编号:
1001-7461(2023)06-0219-09
作者:
 李星媚; 严军*
 (南京林业大学 风景园林学院，江苏 南京 210037)
Author(s):
 LI Xing-mei; YAN Jun*
 (College of Landscape Architecture,Nanjing Forestry University,Nanjing 210037,Jiangsu,China)
关键词:
 ; 长三角; 植被覆盖; Google Earth Engine; 偏最小二乘回归
Keywords:
 ; the Yangtze River Delta;  vegetation cover;  google earth engine (GEE);  partial least squares regression
分类号:
TU986
DOI:
10.3969/j.issn.1001-7461.2023.06.29
文献标志码:
A
摘要:
 基于google earth engine(GEE)云平台，以MODIS EVI影像为数据源，结合Theil-Sen Median趋势分析、Mann-Kendall显著性分析、偏最小二乘回归(PLSR)分析等方法，对2001-2020年长三角地区植被覆盖的时空演变特征及其对气候和人类活动的响应特征进行分析。结果表明，1)2001-2020年，研究区植被覆盖度在时序上呈上升趋势（从0.433增至0.474），整体增长速率约为0.16%·a-1。在空间上呈现“西高东低、南北高中部低”的分布特征，高值区均值0.486，低值区均值0.374。2)植被覆盖动态变化以改善（76.29%）和稳定（8.0%）为主，主要分布在西部和南部；退化区域（22.71%）主要集中在城市扩张地区。3)人类活动因素对植被覆盖时空变化的驱动力（投影重要性＞1）大于气候因素（投影重要性＜0.5）。降水为主要的气候驱动因素。城镇化快速发展导致土地利用变化较大，总体上对植被覆盖起到了显著的正向影响，但也导致景观破碎度增加。研究长三角植被覆盖变化及驱动因素，对区域生态环境监测、保护和建设具有重要现实意义。
Abstract:
 Based on google earth engine (GEE) cloud platform,the spatiotemporal evolvement characteristics and response characteristics to climate and human activities of vegetation cover during 2001-2020 in the Yangtze River Delta were analyzed by MODIS enhanced vegetation index (EVI) data,using Theil-Sen Median trend analysis,Mann-Kendall significance test and partial least squares regression (PLSR) analysis.The results showed that 1) From 2001 to 2020,vegetation cover in the study area showed an upward trend in time series (from 0.433 to 0.474),and the overall growth rate was about 0.16%·a-1.The spatial pattern was high in the west,north and south region and low in the east and middle region,with the average value of 0.486 in the high value area and 0.374 in the low value area.2) The dynamic change of vegetation cover was dominated by improvement (76.29%) and stability (8.0%),mainly distributed in the west and south.The degraded area (22.71%) was mainly distributed in urban expansion region.3) The contribution of human activities (variable importance of projection＞1) to variations in vegetation cover was greater than that of climate factors (variable importance of projection＜0.5).Precipitation was the main climate driving factor.The rapid development of urbanization led to great changes in land use,which generally had a significantly positive impact on vegetation cover,but also resulted in increased landscape fragmentation.The analysis of the changes and driving factors of vegetation cover in the Yangtze River Delta has important practical significance for regional ecological environment monitoring,protection and construction.

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备注/Memo

备注/Memo:
 收稿日期：2022-08-30修回日期：2022-10-09
基金项目：江苏高校优势学科建设工程资助项目（PAPD）；国家林业和草原局软科学研究项目（2018-R20）。
第一作者：李星媚。研究方向：风景园林规划设计与理论。E-mail:xmlinjfu@163.com
*通信作者：严军,教授,博士,硕士生导师。研究方向：生态景观规划。E-mail:csthesis@163.com
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