| 西安市生态韧性与土地利用强度时空关系 |
| 摘要点击 648 全文点击 67 投稿时间：2024-05-13 修订日期：2024-06-18 |
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| 中文关键词 生态韧性 土地利用强度 生态系统服务价值 景观稳定性 时空关系 西安市 |
| 英文关键词 ecological resilience land use intensity ecosystem service value landscape stability spatio-temporal relationship Xi'an |
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| 中文摘要 |
| 研究生态韧性与土地利用强度的时空关系,对于解决城市快速扩张所带来的生态安全问题具有极其重要的价值. 基于抵抗力、适应力和恢复力这3个维度构建生态韧性评价体系,运用生态系统服务价值当量因子、生态弹性、景观稳定性和土地利用强度模型分析了西安市1990~2020年的生态韧性及土地利用强度时空变化格局,最后通过双变量空间自相关、地理加权回归等方法探究两者之间的时空关系. 结果表明：①从1990~2020年,西安市生态韧性在时间上呈现出总体下降趋势,在空间上则表现为中、北部低,南部高的分布格局,其中以北部城市中心地区生态韧性最低且分布面积持续增长. ②从1990~2020年,西安市北部城市中心及人类活动密集地区土地利用强度持续升高,其他地区土地利用强度随时间变化不明显,在空间上总体呈现中、北部高,南部低的分布格局. ③西安市生态韧性与土地利用强度总体呈负相关,且土地利用强度对生态韧性影响较大区域随时间逐渐南移. 中、北部地区以高土地利用强度-低生态韧性聚集为主,在南部以低土地利用强度-高生态韧性聚集为主,且南部低土地利用强度-高生态韧性聚集程度表现出先减少后增加趋势. |
| 英文摘要 |
| The study of the temporal and spatial relationship between ecological resilience and land use intensity is of great value for solving the ecological security problems caused by rapid urban expansion. Based on the three dimensions of resistance, adaptability, and resilience, the ecological resilience evaluation system was constructed, and the spatial and temporal change pattern of ecological resilience and land use intensity in Xi'an from 1990 to 2020 was analyzed by using the ecosystem service value equivalent factor, ecological resilience, landscape stability, and land use intensity models. Finally, we used bivariate spatial autocorrelation, geographical weighted regression, and other methods to explore the spatio-temporal relationship between the two. The results showed that： ① From 1990 to 2020, the ecological resilience of Xi'an showed a general decline in time and a low distribution pattern in the middle and northern parts of Xi'an and a high distribution pattern in the south. The ecological resilience of the northern urban center was the lowest, and the distribution area continued to increase. From the perspectives of resistance, adaptability, and resilience, except for adaptability, the distribution pattern was high in the south and low in the north, and the adaptability was low in the southern mountainous area because of the impact of landscape pattern fragmentation. ② From 1990 to 2020, the land use intensity in the northern urban center of Xi'an and the area with intensive human activities continued to increase. In other areas, land use intensity did not change significantly over time, showing a spatial pattern of high in the middle and north and low in the south. ③ The ecological toughness of Xi'an was negatively correlated with land use intensity, and the area where land use intensity had a greater impact on ecological toughness gradually moved southward over time. In 1990, the regression coefficient between ecological toughness and land use intensity was low, and the correlation was not obvious. The concentration of high land use intensity and low ecological toughness was dominant in the central and northern regions, while the concentration of low land use intensity and high ecological toughness was dominant in the southern region and showed a trend of initial decrease and subsequent increase. |
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