文献类型：期刊文献

中文题名：2000-2020

英文题名：Spatial and temporal characteristics of forest and grass cover in the potential range of desertification in China from 2000 to 2020

作者：Li, Changlong[1,2,3] Wang, Yan[4] Gao, Zhihai[2,3] Sun, Bin[2,3]

第一作者：Li, Changlong

机构：[1] School of Information Technology and Engineering, Guangzhou College of Commerce, Guangzhou, 511363, China; [2] Research Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing, 100091, China; [3] Key Laboratory of Forestry Remote Sensing and Information System, NFGA, Beijing, 100091, China; [4] Shandong Geographical Institute of Land Spatial Data and Remote Sensing Technology, Jinan, 250002, China

年份：2022

卷号：77

期号：11

起止页码：2803-2816

外文期刊名：Dili Xuebao/Acta Geographica Sinica

收录：EI(收录号：20224913208651)

语种：英文

外文关键词：Arid regions - Climatology - Conservation - Ecology - Forestry - Restoration - Vegetation

摘要：The investigation of the dynamic changes of vegetation growth in arid areas is important to the study of the formation, development, and evolution of desertification. By using the Sen+Mann-Kendall method to detect the change of the time series trend, this paper analyzed the spatio-temporal variation characteristics of the vegetation cover in the potential extent of desertification in China (PEDC) from 2000 to 2020, especially in the forest and grass-covered area, based on the data set of annual vegetation coverage obtained by the improved directional dimidiate pixel model. The research results show that: (1) The average vegetation coverage of the PEDC is 0.284, the improved vegetation coverage estimation result well reflects the vegetation coverage, and the estimation accuracy is 86.98%. The vegetation growth situation is getting better, among which the arid area has the most prominent performance, with a significant increase of 48%, while the average increase in the sub-humid arid area is 0.1. (2) The ecological restoration projects of the forest and grass sector are effective, but vegetation restoration is a long and slow process. In terms of forest and grass area, the increase is small (0.002%) from 2000 to 2010 and relatively large (0.371%) from 2010 to 2020. (3) The forest quality of PEDC has improved most obviously among all vegetation types, while the grassland is relatively stable, and the areas of forestland and grassland which have seen significant increase account for 76.4% and 71.8% respectively from 2000 to 2020. Among them, the vegetation coverage of forestland increased by 0.15 in the sub-humid arid region, while that of grassland increased by only 0.06. This study can provide an in-depth understanding of the long-term vegetation growth status in the PEDC, especially in the forest-grass coverage area, and provide important information for the further formulation and implementation of various ecological projects. ? 2022, Science Press. All right reserved.