生态学报2026，Vol.46Issue(3)：1480-1494,15.DOI:10.20103/j.stxb.202505211263
沿海发达地区景观生态风险对城市扩张模式的响应
Response of landscape ecological risks to urban expansion patterns in developed coastal regions:a case study of Jiangsu province
摘要
Abstract
Urban expansion is a key factor that affects the regional ecological environment,therefore,clarifying the relationship between urban expansion and ecological risk is of great and practical significance for sustainable urban development and ecological environment optimization.However,current research remains relatively limited in elucidating the relationship between urban expansion and ecological risk from a micro-scale perspective,especially regarding the impact of different urban development modes on landscape ecological risk.The multi-order adjacency index(MAI)is a novel method for quantifying urban expansion landscapes at more microscopic spatial scales.It uses multi-order buffer zones to distinguish relationships between new and original urban land uses,effectively revealing the processes and characteristics of micro-level urban expansion.Taking Jiangsu Province as a case study,this paper proposes an MAI algorithm based on a grid data model to identify urban expansion patterns,constructs a landscape ecological risk model to reveal the long-term evolution characteristics of environmental risks,and uses Pearson correlation analysis to evaluate the evolution and relationship between urban expansion patterns and landscape ecological risks.The results show that:(1)The urban scale of Jiangsu Province exhibited a expansion trend,and the gravity center of expansion showed a staged evolution pattern of"Northern Jiangsu(1985-2000)→ Central Jiangsu(2000-2010)→ Southern Jiangsu(2010-2020)",with fringe urban expansion being the dominant pattern.(2)Landscape ecological risk generally showed a fluctuating trend of"rising-declining-recovering",and the landscape ecological risk level in Southern Jiangsu,Central Jiangsu,and the eastern coastal area was significantly higher than other regions,with the intense trend of risk level transfer in Northern,Central,and Southern Jiangsu consistent with urban expansion.(3)The landscape ecological risk index was positively correlated with the MAI value,with the intensity of the impact of urban expansion patterns on ecological risk within the same unit area ranked as infill＜fringe＜proximity＜alternate＜separate＜sprawl,indicating that urban expansion exacerbated ecological environment deterioration.(4)The interaction between human activities and climate affected coastal landscape ecological risk,and relevant policies were the main regulating factors of urban expansion.Future development of coastal urban areas should fully consider the differentiated ecological impacts from various urban expansion patterns.This study quantifies the varying effects of urban expansion on landscape ecological risks from a micro perspective,providing a theoretical basis for balancing urban development and ecological conservation.The findings of this study provide a scientific basis and theoretical guidance for sustainable human-land development and the optimization of regional ecological security patterns in developed areas.关键词
景观生态风险/城市扩张模式/江苏省/多阶邻接指数Key words
landscape ecological risk/urban expansion pattern/Jiangsu Province/multi-order adjacency index引用本文复制引用
余李敏,濮励杰..沿海发达地区景观生态风险对城市扩张模式的响应[J].生态学报,2026,46(3):1480-1494,15.基金项目
国家自然科学基金项目(42171245,42476239) （42171245,42476239）
自然资源部海岸带开发与保护重点实验室开放基金项目(2023CZEPK02) （2023CZEPK02）
江苏省自然资源科技计划项目(2023003) （2023003）
