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. 2013 Feb 27;8(2):e56802. doi: 10.1371/journal.pone.0056802

Table 3. Significant parameters in the regression model using Batrachochytrium dendrobatidis (Bd) occurrence and data from wild-occurring amphibians having precise locations in the global Bd database (N = 3,733 locations).

Parameter Coefficient SE P value
Intercept 1.186 0.262 ––
Enigmatic Declines 0.141 0.028 <0.001
Temperature Range −0.089 0.017 <0.001
Average Annual Precipitation −0.0005 0.000 <0.001
Biome –– –– <0.001
Tundra (included in intercept) –– ––
Montane Grasslands & Shrublands 1.929 0.366
Mediterranean Forest, Woodlands & Scrub −0.598 0.126
Tropical & Subtropical Dry Broadleaf Forests −0.346 0.406
Boreal Forests/Taiga −0.649 0.340
Mangroves 0.251 0.773
Deserts & Xeric Shrublands 0.471 0.186
Flooded Grasslands & Savannas 0.323 0.576
Temperate Broadleaf & Mixed Forests 0.397 0.122
Temperate Grasslands, Savannas & Shrublands −0.346 0.172
Temperate Coniferous Forests 0.229 0.124
Tropical & Subtropical Grasslands −0.582 0.198
Tropical & Subtropical Moist Broadleaf Forests 0.224 0.172
Tropical & Subtropical Coniferous Forests 0.503 0.278

Individual biome coefficients represent additive shifts in the Bd-occurrence odds ratio, whereas other coefficients represent multiplicative changes in odds of detecting Bd. Logistic regression with likelihood ratio test statistic (Chi2) was used.