Summary of the Random Forest (RF) and General Additive Model (GAM) for the diversity measures.

Percentage of variance explained by each model and the significant effects of the variables at local and estuarine/catchment scales. All the GAMs were significant at p***p**p*p“ns”: non-significant effects. +/− indicates the direction of the effects. s(factor) indicates smooth effects. “: ”crossed effects interaction.各模型所解释的方差占比，以及变量在局地尺度与河口/集水区尺度上的显著效应。所有广义可加模型（Generalized Additive Models，GAMs）均在p***p**p*p水平下显著；其中"ns"代表效应不显著，"+/−"表示效应的作用方向，"s(因子)"代表平滑效应，":"表示交叉效应的交互作用。