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Dynamic of land use, landscape, and their impact on ecological quality in the northern sand-prevention belt of China.
Chen, Ang; Yang, Xiuchun; Guo, Jian; Zhang, Min; Xing, Xiaoyu; Yang, Dong; Xu, Bin; Jiang, Liwei.
Afiliación
  • Chen A; School of Grassland Science, Beijing Forestry University, Beijing, 100083, China.
  • Yang X; School of Grassland Science, Beijing Forestry University, Beijing, 100083, China. Electronic address: yangxiuchun@bjfu.edu.cn.
  • Guo J; State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China.
  • Zhang M; School of Grassland Science, Beijing Forestry University, Beijing, 100083, China.
  • Xing X; Key Laboratory of Agri-informatics, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
  • Yang D; Key Laboratory of Agri-informatics, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
  • Xu B; Key Laboratory of Agri-informatics, Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
  • Jiang L; Academy of Forestry Inventory and Planning, National Forestry and Grassland Administration, Beijing, 100714, China.
J Environ Manage ; 317: 115351, 2022 Sep 01.
Article en En | MEDLINE | ID: mdl-35642818
Changes in land use and landscapes have a direct impact on the regional eco-environment. It is of great importance to understand the change pattern of land use, landscapes, and their mechanism on the ecological quality, especially ecologically fragile areas. The northern sand-prevention belt (NSPB) is an important ecologically fragile area in China, which has a large influence on the ecological security of the entire country. Based on the land use data of the NSPB in 2000, 2010, and 2018, we studied the spatio-temporal characteristics of land-use change and change in landscape patterns. The ecological quality represented by the remote sensing-based desertification index (RSDI) was calculated using satellite images. The effects of land use and landscape patterns on RSDI were analyzed by geographic detector and geographically weighted regression. Important results include the following: (1) Land-use change in the study area was high during 2000-2010 but slower in 2010-2018. Grassland was the largest land-use type in the NSPB, and varied greatly in terms of total change and spatial location. The major change was the conversion between dense and moderate grass, with 64,860 km2 of dense grass turning into moderate grass, and 48,505 km2 changing the other way. (2) Among the four landscape metrics, patch density, area-weighted mean fractal dimension, and edge density increased, whereas the aggregation index decreased, which indicated that the landscape was developing towards heterogeneity, fragmentation, complexity, and aggregation. Spatially, the landscape metrics presented a strip distribution in the east of the NSPB. (3) The effects of various land-use types on ecological quality, from high to low, were unused land, woodland, dense grass, cropland, moderate grass, built-up land, sparse grass, and waterbody. The areas where the ecological quality was greatly affected by the landscape patterns were concentrated in the agro-pastoral ecotone and the forest-steppe ecotone. The results of this study reveal the trends of land use and landscape patterns in the NSPB over 18 years and can help to understand their mechanism on ecological quality, which is of significance for the management of this area.
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Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Ecosistema / Conservación de los Recursos Naturales País/Región como asunto: Asia Idioma: En Revista: J Environ Manage Año: 2022 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Ecosistema / Conservación de los Recursos Naturales País/Región como asunto: Asia Idioma: En Revista: J Environ Manage Año: 2022 Tipo del documento: Article País de afiliación: China