基于过程评价的土地生态系统耦合协调特征研究  

Study on the Coupling and Coordination Characteristics of Land Ecosystem Based on Process Evaluation

作　　者：张成 陈文波 ZHANG Cheng;CHEN Wenbo(College of Land Resource and Environment,Jiangxi Agricultural University,Nanchang 330045,China;Key Laboratory of Landscape and Environment,Jiangxi Agricultural University,Nanchang 330045,China;School of Geomatics,East China University of Technology,Nanchang 330013,China)

机构地区：[1]江西农业大学国土资源与环境学院,江西南昌330045 [2]江西农业大学南昌市景观与环境重点实验室,江西南昌330045 [3]东华理工大学测绘工程学院,江西南昌330013

出　　处：《江西农业大学学报》2022年第6期1555-1568,共14页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家自然科学基金项目(42261021,41961036)。

摘　　要：【目的】探究土地生态系统耦合协调机制及时空格局特征,为改善土地生态系统的整体功能和效益提供参考。【方法】以河北省为例,基于“机制—评价体系—方法”的研究范式,立足于过程评价的视角,在剖析土地生态系统耦合协调作用机制的基础上,基于压力、状态和响应3个过程构建评价指标体系,采用土地综合评价模型和容量耦合协调模型分析土地生态系统的安全状况及耦合协调时空格局特征。【结果】(1)2010—2020年,河北省土地生态系统综合安全指数持续增长,由0.300上升到0.699,年均增长率为13.30%,土地生态系统安全等级明显提高,由恶化级升格为敏感级,土地生态系统安全状况显著改善。但综合安全指数的均值为0.509,平均安全等级尚处于风险级,土地生态系统总体安全水平仍然较低。(2)时间尺度上,2010—2020年,河北省土地生态系统耦合度和协调度均呈现稳步增长态势,且耦合作用的强度大于协调性,但协调度的增长速率大于耦合度。其中,耦合状态由低度耦合过渡到基本耦合,协调状态由低度协调过渡到基本协调,土地生态系统内部3个子系统之间相互作用程度和相互协同程度不断加强。但平均耦合状态刚达到基本耦合,平均协调状态尚处于低度协调,耦合协调性的提升空间还很大。(3)空间尺度上,从空间格局来看,11个地级市在2010年、2015年和2020年3个典型年份耦合度出现了低度耦合、基本耦合和中度耦合3种状态,协调度出现了低度协调、基本协调和中度协调3种状态;耦合度和协调度的分布特征基本相似,高、低值区大致呈“中间低,两翼高”的分布格局。从空间组合来看,11个地级市耦合和协调状态既出现了同级叠合,又出现了异级交错,产生了低耦合低协调区、基本耦合低协调区、基本耦合基本协调区、中耦合基本协调区和中耦合中协调区5种空间组合�[Objective]The purpose of this study is to explore the mechanism and spatio-temporal characteristics of coupling coordination of land ecosystem,thus providing a reference for improving the overall function and benefit of land ecosystem.[Method]Taking Hebei Province as a case and based on the research paradigm of“mechanism-evaluation system-method”,this study firstly investigated the coupling coordination development interactive mechanism of land ecosystem and constructed an evaluation index system of coupling coordination from the perspective of process evaluation by comprehensively considering pressure,status and response.Then,this study analyzed the security status and the spatio-temporal characteristics of coupling coordination of land ecosystem by using the land comprehensive evaluation model and coupling coordination degree model.[Result](1)From 2010 to 2020,the value of land ecological security of Hebei showed an overall increasing trend,shifting from 0.300 to 0.699,with an average annual growth rate of 13.30%.The security level of land ecosystem was upgraded from the deteriorate grade to the sensitive grade,which indicates that the security status of land ecosystem has been improved.However,the average value of land ecological security was 0.509,which was still at the risk level,indicating that the overall security status of land ecosystem was still low.(2)On the temporal scale,from 2010 to 2020,the coupling and coordination of land ecosystem in Hebei Province showed a steady growth trend,and the strength of coupling effect was higher than that of coordination,but the growth rate of coordination was higher than that of coupling.The coupling state shifted from the low coupling to the basic coupling,and the coordination state shifted from the low coordination to the basic coordination,indicating that the degree of interaction and synergy among the three subsystems of land ecosystem has been strengthened continuously.However,the average coupling state has just reached the basic coupling,and the average co

关 键 词：过程评价 土地生态系统 容量耦合协调模型 耦合协调度 河北省 

分 类 号：X826[环境科学与工程—环境工程]