Association of three morphological variables for 11 bird species with the smooth term “year” in a GAM.

Shown are the degrees of freedom (df), F and p values of the smooth term as well as the adjusted R2 of the models. Bold: p<0.05. See methods for details.

此处展示了各模型平滑项的自由度（df）、F值与p值，以及模型的调整后决定系数（adjusted R²）。其中p<0.05的结果以加粗格式呈现。详细信息请参见方法章节。