Spatial and Temporal Differentiation of Landscape Ecological Risk in Qinling-Daba Mountains

Chen Quantong; Yin Haoran; Li Yanhong; Dong Qingdong; Zhang Pingping; Zhu Lianqi

doi:10.13961/j.cnki.stbctb.2022.03.031

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Spatial and Temporal Differentiation of Landscape Ecological Risk in Qinling-Daba Mountains

- Spatial and Temporal Differentiation of Landscape Ecological Risk in Qinling-Daba Mountains
- Bulletin of Soiland Water Conservation Vol. 42, Issue 3, Pages: 239-246(2022)
- 作者机构：
  
  河南大学地理与环境学院,河南,开封,475004
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.03.031
  CLC： X826;F301.2
- Published：2022
- 稿件说明：
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Chen Quantong, Yin Haoran, Li Yanhong, et al. Spatial and Temporal Differentiation of Landscape Ecological Risk in Qinling-Daba Mountains[J]. Bulletin of Soiland Water Conservation, 2022, 42(3): 239-246.
DOI：

Chen Quantong, Yin Haoran, Li Yanhong, et al. Spatial and Temporal Differentiation of Landscape Ecological Risk in Qinling-Daba Mountains[J]. Bulletin of Soiland Water Conservation, 2022, 42(3): 239-246. DOI： 10.13961/j.cnki.stbctb.2022.03.031.

摘要

[目的] 科学评估秦巴山地景观生态风险，为区域内生态安全建设和可持续发展提供科学依据。[方法] 以秦巴山地2000—2020年3期地表覆被数据为基础，应用空间分析法和地形分布指数法，定量地分析秦巴山地景观生态风险的时空特征，以及其在各地形梯度上的动态变化。[结果] ①秦巴山地景观生态风险整体偏低，空间差异特征显著，且存在着明显的空间集聚效应，呈东西两侧跟中间高，南北低的空间分布格局。②2000—2020年，秦巴山地景观生态风险呈下降趋势，低生态风险区明显扩张，高生态风险区显著缩小。③高生态风险多集中分布于海拔高、地形复杂或海拔低、地形平坦地区，低生态风险在中等地形梯度地区呈优势分布。[结论] 秦巴山地景观生态风险整体呈下降趋势，表明区域内生态环境质量有所提升；秦巴山地景观生态风险的空间分布格局受地形影响较大，且相对稳定。

Abstract

[Objective] The landscape ecological risk of the Qinling-Daba Mountains was scientifically assessed in order to provide a scientific basis for ecological security construction and for sustainable development in the region.[Methods] The spatial analysis method and the topographic distribution index method were used with land surface cover data for the Qinling-Daba Mountains from 2000 to 2020 to quantitatively analyze the temporal and spatial characteristics of the Qinling-Daba Mountains landscape ecological risk

and its dynamic changes on geographical terrain gradients.[Results] ① The overall ecological risk of the Qinling-Daba Mountains landscape was low

with significant spatial differences. There was an obvious spatial agglomeration effect

presenting a spatial distribution pattern of east and west sides

high in the middle

and low in the north and south. ② From 2000 to 2020

the ecological risk of the Qinling-Daba Mountains landscapes showed a downward trend

with low ecological risk areas expanding significantly

and high ecological risk areas shrinking significantly. ③ High ecological risk values were mostly concentrated in areas with high altitude

complex terrain

or low altitude and flat terrain. Low ecological risk values were predominantly located in areas with medium terrain gradients.[Conclusion] The overall landscape ecological risk in the Qinling-Daba Mountains showed a downward trend

indicating that the quality of the ecological environment in the region had improved. The distribution pattern of landscape ecological risk in the Qinling-Daba Mountains was greatly affected by topography and was relatively stable.

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