文献类型：期刊文献

英文题名：Evaluation of urban expansion and the impacts on vegetation in Chinese Loess Plateau: a multi-scale study

作者：Zhao, Anzhou[1];Liu, Xiaoqian[2];Zheng, Zhoutao[3]

第一作者：Zhao, Anzhou

通讯作者：Zhao, AZ[1];Liu, XQ[2]

机构：[1]Hebei Univ Engn, Coll Min & Geomat, Handan 056038, Peoples R China;[2]Beijing Union Univ, Coll Appl Arts & Sci, Beijing 100191, Peoples R China;[3]Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China

第一机构：Hebei Univ Engn, Coll Min & Geomat, Handan 056038, Peoples R China

通讯机构：[1]corresponding author), Hebei Univ Engn, Coll Min & Geomat, Handan 056038, Peoples R China;[2]corresponding author), Beijing Union Univ, Coll Appl Arts & Sci, Beijing 100191, Peoples R China.|[114172]北京联合大学应用文理学院;[11417]北京联合大学;

年份：0

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;Scopus(收录号：2-s2.0-85136566453);WOS:【SCI-EXPANDED(收录号:WOS:000842143000001)】；

基金：The work was partially supported by the National Natural Science Foundation of China (No. 42171212, 41877523) and the Natural Science Foundation of Hebei Province (No. D2022402030).

语种：英文

外文关键词：Urbanization; EVI; Urbanization intensity; Vegetation degradation and improvement; Chinese Loess Plateau

摘要：Vegetation degradation caused by rapid urban expansion is a pressing global challenge. Focusing on the Chinese Loess Plateau (CLP), we use satellite observations from 2000 to 2017 to evaluate the spatiotemporal pattern of urban expansion, and its imprint on vegetation across old urban, new urban, urban, non-urban areas as well as the entire urbanization intensity (UI) gradient (from 0 to 100%). We found a massive increase of urban impervious surface area (UISA) in the CLP from 2000 to 2017, and an uneven expansion of UISA at different urban agglomerations and cities. Less green were found in urban and new urban areas, while old urban and non-urban areas generally showed an improved greening pattern. In addition, the annual maximum EVI (EVImax) differences between urban and non-urban areas were- 0.0995 on average from 2000 to 2017. The Guanzhong Plain urban agglomeration (GPUA) witnessed the most significant EVImax differences (-0.120), and the Ningxia Yanhuang urban agglomeration (NYUA) witnessed the lowest EVImax differences (-0.012). The EVImax showed significantly decreased trends along the entire spectrum of urbanization gradient for 97.4% (38 of 39) cities and five urban agglomerations. The most significant decrease was found in the GUPA (slope = -0.0197/10a, p < 0.01), while the smallest drop was found in the NYUA (slope = -0.011/10a, p < 0.01). This study offered a fundamental support for understanding the vegetation variation along the urban-rural gradient, which may help stakeholders to make better ecological management policies for urban vegetation in ecologically fragile areas.