Fu Mengyu,Qiu Menglong,Fu Shaowu,et al.Spatiotemporal evolution of land use intensity and landscape ecological risk and their coupling coordination characteristics[J].Research of Soil and Water Conservation,2025,32(03):291-299.[doi:10.13869/j.cnki.rswc.2025.03.033]
土地利用强度与景观生态风险的时空演变及其耦合协调特征
- Title:
- Spatiotemporal evolution of land use intensity and landscape ecological risk and their coupling coordination characteristics
- 文章编号:
- 1005-3409（2025）03-0291-09
- Keywords:
- land use intensity; landscape ecological risk; spatiotemporal variation; coupling coordination; Shaanxi section of the Yellow River Basin
- 分类号:
- F301.24
- 文献标志码:
- A
- 摘要:
- [目的]土地利用强度是影响景观生态风险的重要因素，厘清二者之间复杂的非线性关系，可为土地资源可持续利用与区域生态安全提供科学依据。[方法]以黄河流域陕西段为例，分析土地利用强度与景观生态风险的时空分异特征，并运用耦合协调度模型，探究二者之间的耦合协调特征。[结果]（1）2000—2020年黄河流域陕西段土地利用强度呈逐年递增趋势，年均增长率为4.55%，空间上由北向南呈递增趋势；（2）景观生态风险总体处于中生态风险等级，2000—2020年生态风险指数由0.19下降到0.17，呈轻微下降趋势，由北向南呈递减趋势，平均85.5%的高生态风险区分布在北部的长城沿线风沙区和渭北黄土旱塬区；（3）土地利用强度与景观生态风险的耦合协调度由2000年的0.40上升到2020年的0.46，呈逐年上升趋势，由北向南呈递增趋势；当土地利用强度大于0.13时，土地利用强度与景观生态风险之间的关系由相互抑制的低耦合协调转变为相互促进的高耦合协调。[结论]黄河流域陕西段的土地利用强度、景观生态风险以及二者之间的耦合协调度均呈明显的时空异质性特征，且耦合协调度随着土地利用强度的增加呈增加趋势。
- Abstract:
- [Objective] Land use intensity is a critical factor affecting landscape ecological risk. Clarifying the complex nonlinear relationship between the two can provide a scientific basis for the sustainable utilization of land resources and regional ecological security. [Method] Taking the Shaanxi section of the Yellow River Basin as a case study, this research analyzed the spatiotemporal differentiation characteristics of land use intensity and landscape ecological risk. Additionally, a coupling coordination degree model was applied to explore the coupling coordination characteristics between the two. [Results] (1) From 2000 to 2020, land use intensity in the Shaanxi section of the Yellow River Basin showed an overall increasing trend, with an average annual growth rate of 4.55%. Spatially, the intensity increased from north to south. (2) The overall landscape ecological risk was at a medium level. The ecological risk index decreased slightly from 0.19 in 2000 to 0.17 in 2020, showing a declining trend from north to south. On average, 85.5% of the high ecological risk areas were distributed in the eolian sandy region along the Great Wall in the north and the Weibei loess plateau region. (3) The coupling coordination degree between land use intensity and landscape ecological risk increased annually from 0.40 in 2000 to 0.46 in 2020, showing an annual upward trend and increasing spatially from north to south. When land use intensity exceeded 0.13, the relationship between the two shifted from low coupling coordination, characterized by mutual suppression, to high coupling coordination, characterized by mutual promotion. [Conclusion] The land use intensity, landscape ecological risk, and their coupling coordination degree in the Shaanxi section of the Yellow River Basin exhibit significant spatiotemporal heterogeneity. Moreover, the coupling coordination degree increases as land use intensity rises.
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备注/Memo
收稿日期：2024-08-17 修回日期：2024-09-16 接受日期：2024-10-14
资助项目：国家自然科学基金项目（42471307，41901262）；陕西省自然科学基础研究计划资助项目（2024JC-YBQN-0300）；陕西省社科基金项目（2024R040）；中央高校基本科研业务费专项资金项目（24ZYYB017）
第一作者：付梦雨（1999—），女，山东昌邑人，硕士研究生，研究方向为土地利用及其生态效应。E-mail：fumyu99@163.com
通信作者：邱孟龙（1988—），男，山东胶州人，博士，副研究员，主要从事土地利用及其生态效应。E-mail：qml7886@163.com