| 刊名 | Meteorological and Environmental Research |
| 作者 | Fangfang DENG1,2, Zhongfa ZHOU1,2*, Denghong HUANG1,2, Yang ZHANG1,3, Fuxianmei ZHANG1,2, Shuanglong DU1,2, Yue YANG1,2 |
| 作者单位 | 1.School of Karst Science/School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550001, China; 2.State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China; 3.117 Geology Brigade, Guizhou Bureau of Geology and Mineral Exploration and Development, Guiyang 550001, China |
| DOI | 10.19547/j.issn2152-3940.2024.01.004 |
| 年份 | 2024 |
| 刊期 | 1 |
| 页码 | 16-26 |
| 关键词 | Karst mountainous area; Landscape pattern; Landscape ecological risk index; Terrain distribution index |
| 摘要 | [Objective] The ecological vulnerability and landscape ecological risk of karst mountainous areas have increased as a result of enhanced disturbance of natural resources by human activities. This paper aimed to explore the characteristics of ecological risk evolution under different landscape patterns in the region, with a view to providing reference for land classification protection, sustainable use of resources and regional ecological risk optimization in karst mountainous areas. [Method] Taking Huangping County, a typical karst mountainous area, as an example, eight evaluation factors of natural and landscape patterns were selected to construct a landscape ecological risk evaluation model, to quantitatively explore the spatio-temporal evolution of landscape ecological risk and the trend of risk level transfer in the study area from 2010-2018, and to reveal the complex relationship between ecological risk and topography in karst mountainous areas. [Result] ① From 2010 to 2018, land use types changed to different degrees, with the most amount of woodland transferred out (1 627.37 hm2) and the most amount of construction land transferred in (1 303.93 hm2); a total of 3 552.31 hm2 of land was transferred, with a change ratio of 2.13%, and there was a significant conversion between construction land, arable land, and woodland. ② From 2010 to 2018, the landscape ecological risk in the study area changed significantly, and the landscape ecological risk index decreased from 0.344 1 to 0.173 3, showing an upward and then downward trend; the landscape ecological risk of the whole region was dominated by low-risk and lower-risk zones, and the ecological risk level generally shifted from a high level to a low level, and the ecological environment was improved. ③ There was a negative correlation between ecological risk and topographic position, and high-risk zones were mainly distributed among low topographic zones; with the change of time, the advantage of risk level for the selection of topography was gradually weakened, and the influence of anthropogenic factors on the ecological risk of the landscape was becoming more and more prominent. [Conclusion] This paper can provide theoretical basis for land use optimization and ecological protection in karst mountainous areas. |
