Table 5 The summary statistics for GAMs for abundance, richness and diversity relationships with selected environmental variables for leaf-litter and semi-aquatic amphibians in a lowland tropical rainforest in northeastern Leyte, Philippines.

From: Impact of habitat alteration on amphibian diversity and species composition in a lowland tropical rainforest in Northeastern Leyte, Philippines

 

Estimate

SE

Z

P

Abundance

 Parametric coefficients

  Intercept

5.723

0.878

6.515

 < 0.001

  Temperature

− 0.124

0.033

− 3.787

 < 0.001

  Smooth terms

edf

df

Chi sq

P

  s (DBH)

1.899

1.990

3.709

0.137

  Adjusted R2

0.242

   

Richness

 Parametric coefficients

  Intercept

1.170

0.104

11.240

 < 0.001

  Smooth terms

edf

df

Chi sq

P

  s (Understorey density)

1.794

1.958

8.224

0.027

  Adjusted R2

0.293

   
 

Estimate

SE

t

P

Diversity

 Parametric coefficients

  Intercept

0.958

0.075

12.740

 < 0.001

  Smooth terms

edf

df

F

P

  s (Understorey density)

1.403

1.640

2.137

0.168

  s (Tree density)

1.331

1.551

2.649

0.102

  s (Temperature)

1.410

1.650

1.414

0.357

  Adjusted R2

0.359

   
  1. GAM for abundance includes linear term for temperature and smoothed-term for DBH; GAM for species richness only includes smoothed-term for understorey density; GAM for diversity (Shannon–Wiener) includes smoothed-terms for understorey density, tree density and temperature.
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