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

陈宁,张扬建,朱军涛,李军祥,刘瑶杰,俎佳星,丛楠,黄珂,王荔

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

Ning CHEN,Yang-Jian ZHANG,Jun-Tao ZHU,Jun-Xiang LI,Yao-Jie LIU,Jia-Xing ZU,Nan CONG,Ke HUANG,Li WANG

表2 高寒草甸退化过程中土壤理化性质线性和非线性响应比较

Table 2 Comparison between linear and nonlinear responses of soil physicochemical properties to alpine meadow degradation

R2 拟合模型 Fitted model 土壤容重 Soil bulk density 线性模型 Linear model 0.66*** y = -0.006x + 1.695 非线性模型 Nonlinear model 0.76*** y = 0.0002x2 + 0.012x + 1.326 砾石质量比 Mass ratio of gravel 线性模型 Linear model 0.13 y = -0.155x + 47.310 非线性模型 Nonlinear model 0.53* y = 0.023x2-2.326x + 89.838 砾石体积比 Volume ratio of gravel 线性模型 Linear model 0.44** y = 0.240x + 37.607 非线性模型 Nonlinear model 0.58** y = 0.011x2-1.300x + 58.371 土壤氮含量 Soil nitrogen content 线性模型 Linear model 0.42*** y = 0.003x + 0.264 非线性模型 Nonlinear model 0.46*** y = -0.0001x2 + 0.011x + 0.115 土壤碳含量 Soil carbon content 线性模型 Linear model 0.50*** y = 0.049x + 2.35 非线性模型 Nonlinear model 0.55*** y = -0.001x2 + 0.159x + 0.183