高寒草甸退化过程中群落生产力和物种多样性的非线性响应机制研究

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陈宁^1,²,张扬建^1,^3,⁴,朱军涛^1,^*(

),李军祥⁵,刘瑶杰^1,²,俎佳星^1,²,丛楠¹,黄珂¹,王荔⁵

Nonlinear responses of productivity and diversity of alpine meadow communities to degradation

CHEN Ning^1,²,ZHANG Yang-Jian^1,^3,⁴,ZHU Jun-Tao^1,^*(

),LI Jun-Xiang⁵,LIU Yao-Jie^1,²,ZU Jia-Xing^1,²,CONG Nan¹,HUANG Ke¹,WANG Li⁵

图8. 影响地上生物量与地下生物量的直接因素和间接因素的结构等式模型。带有箭头的虚线表示关系不显著(p > 0.1), 实线表示关系显著(p < 0.1), 带有箭头线上的数字是标准化路径系数(*, p < 0.1; **, p < 0.05; ***, p < 0.01)。AIC, 最小信息准则; AIC_dm, 内定模式; AIC_im, 独立模式; AIC_sm, 饱和模式; DF, 自由度; NFI, 增值适配度指数; RMSEA, 绝对适配指数。

Fig. 8. The results of structural equation models showed the direct and indirect impacts of various factors on biomass and species diversity. A dotted line relationship of the arrow was not significant (p > 0.1), the solid line shows the relationship between significantly (p < 0.1), the degree of thickness line to reflect the degree of a strong relation between variables, with the arrow line Numbers are standardized path coefficient (*, p < 0.1; **, p < 0.05; ***, p < 0.01). AIC, an information criterion; AIC_dm, default mode; AIC_im, independence model; AIC_sm, saturated model; DF, degree of freedom; NFI, normed fit index; RMSEA, root mean square error of approximation.