基于生态网络分析的厦漳泉地区土地碳代谢  

Land carbon metabolism in Xiamen-Zhangzhou-Quanzhou region based on ecological network analysis

作　　者：李晶 陈松林[1,2] 李晨欣 周萍 LI Jing;CHEN Songlin;LI Chenxin;ZHOU Ping(School of Geographical Sciences/School of Carbon Neu-trality Future Technology,Fujian Normal University,Fuzhou 350117,China;Key Laboratory of Subtropical Resources and Environment of Fujian Province,Fuzhou 350117,China)

机构地区：[1]福建师范大学地理科学学院/碳中和未来技术学院,福州350117 [2]福建省亚热带资源与环境重点实验室,福州350117

出　　处：《应用生态学报》2023年第5期1375-1383,共9页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(41771136);福建省科技计划项目(2019R0124)资助。

摘　　要：揭示人-自然耦合系统碳代谢与碳平衡的内在关系机理,对减少区域碳排放和推进低碳发展有重要的理论和实践意义。以2000—2020年厦漳泉地区为例,构建基于碳流的土地碳代谢空间网络模型框架,运用生态网络分析方法探讨了土地碳代谢系统的结构、功能和生态关系的时空异质性。结果表明:2000—2020年,研究区主要的负碳转移均来自耕地转为工业及交通用地,负碳流高值区主要分布在厦漳泉地区中东部工业较发达的区域;生态关系以竞争关系为主且空间扩张明显,导致整体生态效用指数下降,影响区域碳代谢平衡;驱动权重生态层次由金字塔结构转变为相对更规则的结构,贡献最大是生产者层,牵引权重生态层次由金字塔结构变为倒金字塔结构,主要是工业及交通用地权重增长过大所致。低碳发展需注重伴随土地利用转换引起的负碳转移来源及对碳代谢平衡的综合影响,制定差异化的土地低碳利用模式和碳减排政策。Discovering the underlying mechanisms between carbon metabolism and carbon balance of human-natural system is of important theoretical and practical significance for reducing regional carbon emissions and promoting low-carbon development.Taking Xiamen-Zhangzhou-Quanzhou region from 2000 to 2020 as an example,we con-structed the framework of spatial network model of land carbon metabolism based on carbon flow,and inquired into the spatial and temporal heterogeneity in the carbon metabolic structure,function and ecological relationships by using the ecological network analysis.The results showed that the dominant negative carbon transitions related with land use changes came from the conversion of cultivated land to industrial and transportation land,and that the high value areas of negative carbon flow were mainly distributed in the areas with relatively developed industries in the middle and east parts of Xiamen-Zhangzhou-Quanzhou region.Competition relationships were the dominant type and the spatial expansion was obvious,which led to the decreases of the integral ecological utility index and affected the regional carbon metabolic balance.The ecological network hierarchy of driving weight changed from a pyramid structure to a relatively more regular structure,with the producer contributing the most.The ecological network hie-rarchy of pull weight changed from a pyramid structure to an inverted pyramid structure,mainly due to the excessive increase of industrial and transportation land weights.Low-carbon development should focus on the sources of nega-tive carbon transitions caused by land use conversion and its comprehensive impacts on carbon metabolic balance,to formulate differentiated low-carbon land use patterns and carbon emission reduction policies.

关 键 词：土地碳代谢 生态网络分析 生态层次 碳转移 

分 类 号：X144[环境科学与工程—环境科学]