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Table 2 Principal Components Analysis of vegetation and litter characteristics at the microhabitat scale

From: Are all patches worth exploring? Foraging desert birds do not rely on environmental indicators of seed abundance at small scales

 

PC1

PC2

PC3

Grasses

0.334

− 0.138

0.648

Dry standing grasses

0.085

0.061

0.752

Low shrubs

0.502

0.339

− 0.435

Tall shrubs (< 1 m)

0.789

− 0.392

0.129

Tall shrubs (> 1 m)

0.767

− 0.396

0.133

Trees (< 1 m)

0.017

0.850

0.040

Trees (> 1 m)

0.121

0.865

− 0.128

No vegetation

− 0.872

− 0.162

− 0.176

Bare ground

− 0.875

− 0.301

− 0.167

Dense litter

0.877

0.292

0.094

Eigenvalue

3.892

2.121

1.295

% variability explained

38.9

21.2

12.9

% variability accumulated

38.9

60.1

73.1

  1. Results of the Principal Components Analysis of the ten variables measured at the microhabitat scale. Main loadings for the three retained components are shown in italics