生态学报2024，Vol.44Issue(22)：10471-10485,15.DOI:10.20103/j.stxb.202402240388
生态安全格局视角下黄土高原生态网络韧性研究
A study on the resilience of ecological networks in the Loess Plateau from the perspective of ecological security patterns
摘要
Abstract
The resilience of ecological networks refers to the ecosystem's capacity to withstand,recover from,and adapt to unpredictable disturbances,which stands at the forefront of contemporary ecosystem research.This paper developed an evaluation framework for the ecological security pattern,focusing on"water resources,soil and water conservation,desertification,and ecosystem quality."It identified ecological sources,extracts corridors utilizing the MCR model,and scrutinized the characteristics of the ecological security pattern on the Loess Plateau.The gravity model was employed to establish an ecological network,enabling an examination of the resilience traits inherent in the network,along with an analysis of the scope and strength of influence exerted by core nodes.The network robustness model was utilized to simulate the variations in ecological network resilience across diverse scenarios on the Loess Plateau.The findings revealed that:(1)there was notable spatial heterogeneity in ecological source areas and corridors across the Loess Plateau.The ecological source areas exhibited dense distribution in the north and sparse distribution in the south,demonstrating a northeastern to southwestern trend.The primary core source areas were predominantly situated in the Inner Mongolia Autonomous Region and Yulin City.(2)The ecological network of the Loess Plateau operated in a clustered mode,characterized by high transmission efficiency and exhibiting a proximity effect and preference dependence effect in network connections.The network structure displayed a clear hierarchy,with core nodes exerting significant control and exerting a driving influence on network dynamics through radiation effects.(3)In the face of deliberate attacks and random failures,both the connectivity robustness and vulnerability robustness of the Loess Plateau ecological network experienced noticeable declines.However,the reduction in network connectivity was more pronounced,rendering the network fragile and indicating fragility in the ecological network as a whole.In the deliberate attack scenario,the ecological network experienced a more pronounced decrease in toughness,emphasizing the influential role of core nodes in controlling and radiating effects across the network,exhibiting a wide-ranging and intense influence.To enhance the ecological environment quality of the Loess Plateau,it is imperative to safeguard the core source areas while bolstering connections among marginal source areas.This strategy fostered the formation of a densely interconnected multi-core ecological network,which is vital for sustaining ecological integrity and resilience across the region.关键词
生态网络韧性/MCR模型/引力模型/鲁棒性模型/黄土高原Key words
resilience of ecological network/MCR Model/gravity model/robustness model/the Loess Plateau引用本文复制引用
杨亮洁,张玲玲,张芳宁,杨永春,罗亚玲..生态安全格局视角下黄土高原生态网络韧性研究[J].生态学报,2024,44(22):10471-10485,15.基金项目
甘肃省科技计划项目-软科学专项(23JRZA402) （23JRZA402）
国家自然科学基金地区项目(42361031,41961030) （42361031,41961030）
西北师范大学绿洲科学科研成果突破行动计划项目(NWNU-LZKX-202306) （NWNU-LZKX-202306）
