基于SEM三江平原湿地生态系统健康与扰动因素分析

依据三江平原湿地生态系统特点,用SPSS20.0和Lisrel8.7软件建立了结构方程模型。根据结构方程模型分析,确定湿地生态系统健康的主要影响因子及其相互关系。结果表明:自然扰动和人类扰动,直接影响湿地自我免疫与抗扰动能力的发挥;湿地自我免疫与抗扰动能力,又影响湿地满足人类社会需求能力,具有中介变量的属性。湿地满足人类社会需求能力,是湿地生态系统健康的直接表现;湿地自我免疫与抗扰动能力,是湿地生态系统健康的间接反映。

Wetland Ecosystem Health and Disturbance Factors Analysis on the Sanjiang Plain Based on SEM Theory

On the basis of Sanjiang Plain Wetland ecological system characteristics, we established structural equation model with SPSS20.0 and Lisrel8.7 software.According to the structural equation model analysis, we determined the main factors that influence the wetland ecosystem health and its relationship to each other.Natural disturbance and human disturbance directly affected the wetlands immune and ability to resist disturbance.Wetlands’ immunity and its ability to resist disturb-ance of self-ability affected the demand of human society, and it possessed the property of the intermediary variable.Wet-land ability to meet the demand of human society was the direct expression of wetland ecosystem health, and wetlands’ im-munity and its ability to resist disturbance were the indirect reflection of wetland ecosystem health.