Exploring changes in landscape ecological risk in the Yangtze River Economic Belt from a spatiotemporal perspective
Exploring changes in landscape ecological risk in the Yangtze River Economic Belt from a spatiotemporal perspective
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DOI：
10.1016/j.ecolind.2022.108744
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发表时间：
2022-04
影响因子：
6.9
通讯作者：
Penglai Ran;Shougeng Hu;Amy E. Frazier;S. Qu;De-Qing Yu;Luyi Tong
中科院分区：
文献类型：
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作者：
Penglai Ran;Shougeng Hu;Amy E. Frazier;S. Qu;De-Qing Yu;Luyi Tong
景观生态风险反映了生态系统受到人类活动和环境变化威胁的程度，越来越被视为区域生态系统管理决策的基础。长江经济带在人类活动的影响下经历了剧烈的土地利用变化，但其生态风险的时空异质性尚未得到深入研究。本研究构建并应用景观格局特征与景观脆弱性动态相结合的生态风险评估框架，分析2000 - 2018年长江经济带景观生态风险的时空变化特征。结果显示，在研究期间，长江经济带大部分地区的风险水平中等，但西部和北部地区的风险明显较高。由于区域政策的逐步完善和生态系统修复工程的实施，风险降低趋势明显，研究期间原高、中高风险区域减少了15万km以上。大约45%的研究区域，风险更难以缓解或维持在较低的水平，被确定为未来风险管理的关键区域。生态风险的显著时空差异凸显了实施空间分异风险管理策略和长期动态监测的必要性。本研究可为未来长江经济带土地利用优化和景观可持续管理提供参考。
Landscape ecological risk reflects the extent to which ecosystems are threatened by human activities and environmental changes and is increasingly seen as the basis for decision-making in regional ecosystem management. Although the Yangtze River Economic Belt (YREB) has experienced drastic land use changes affected by human activities, the spatiotemporal heterogeneity of ecological risk in the region has not been thoroughly investigated. This study develops and applies an ecological risk assessment framework that integrates landscape pattern characteristics and landscape vulnerability dynamics to analyze spatiotemporal variations in landscape ecological risk in the YREB from 2000 to 2018. The results show moderate risk levels across most of the YREB during the study period, but risk was notably higher in the western and northern regions. Due to the gradual improvement in regional policies and the implementation of ecosystem restoration projects, there is a clear trend of risk reduction, and the area previously designated as high or medium–high risk was reduced by more than 150,000 km2over the study period. Approximately 45% of the study area, where the risks are more difficult to mitigate or maintain at lower levels, was identified as a key area for future risk management. Significant spatiotemporal differences in ecological risks underscore the necessity of implementing spatially differentiated risk management strategies and long-term dynamic monitoring. This study provides a reference for future land use optimization and sustainable landscape management in the YREB.