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Table 2 Generalized linear mixed model of embryonic survival.

From: Adaptive divergence of the moor frog (Rana arvalis) along an acidification gradient

Random effects Variance ± SE Z P
Family (Pond pH) 35.77 ± 14.78 2.42 0.008
Family (Pond pH) × pH treatment 80.88 ± 14.22 5.69 < 0.001
Fixed effects ndf ddf F P
Pond pH 7 60.8 1.2 0.319
pH treatment 2 127.4 430.6 < 0.001
Pond pH × pH treatment 14 120.2 2.7 0.002
Block 2 546.0 11.3 < 0.001
Linear contrasts ndf ddf F P
Pond pH 1 61.3 1.3 0.256
Pond pH × pH treatment (4.0 vs. 4.3) 1 85.6 10.6 0.002
Pond pH × pH treatment (4.0 vs. 7.5) 1 179.1 24.0 < 0.001
Pond pH × pH treatment (4.3 vs. 7.5) 1 174.2 5.2 0.024
  1. Results are shown for eight R. arvalis populations occurring along a pH gradient. Significant effects are highlighted in bold