Table 1

Selected GLM models (with their explained deviance and adjustment quality) for richness and abundance of native post-metamorphic amphibians, in San Carlos. All the used exploratory variables are listed. For each selected exploratory variable, the estimated coefficient, the residual deviance, the P-value, and the effect (positive “+” or negative “–”) are included. When a variable was not selected by the model it is indicated with a “NI” (not included). When a variable was not statistically significant it is indicated with a “NS”. The sampling date was always included as an explanatory variable, because it denotes the experimental design.

GLM Estimated coefficient Residual deviance 9-value Effect
Post-metamorphic richness (Explained deviance 13.4; Adjustment quality 1.02)
(Intercept) 3.32      
Bullfrog presence 0.61 56.2 0.028
Air temperature       NI
Humidity       NI
Wind       NI
Cloud cover       NI
Sampling date   61.0 0.27 NS
Post-metamorphic abundance (Explained deviance 16.6; Adjustment quality 1.2)
(Intercept) 0.20      
Bullfrog presence       NI
Air temperature 1.22 71.4 0.033 +
Humidity       NI
Wind 0.25 67.3 0.041
Cloud cover       NI
Sampling date   76.0 0.20 NS

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