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Table 2 Principal Component Analysis (eigenvalues ≥ 0.60) for microhabitat factors used by Hypsipetes leucocephalus in the yew ecological garden representing a fragmented forest in Southeast China

From: Importance of microhabitat selection by birds for the early recruitment of endangered trees in a fragmented forest

Factor types

PC1

PC2

PC3

PC4

Elevation

0.441

0.177

0.280

0.455

Aspect

0.205

0.090

0.242

‒ 0.345

Slope

0.281

0.593

0.157

0.012

Distance to water

0.109

0.362

0.394

0.549

Distance to light gap

0.133

0.733

‒ 0.043

‒ 0.318

Distance to roads

0.310

0.413

0.568

‒ 0.056

Distance to Taxus chinensis tree

‒ 0.505

‒ 0.118

‒ 0.022

0.560

Type of heterogeneous tree

‒ 0.183

‒ 0.269

0.801

‒ 0.019

Distance to heterogeneous tree

0.434

‒ 0.143

0.407

‒ 0.197

Distance to Taxus chinensis mother tree

‒ 0.665

0.157

0.232

0.236

Distance to fallen dead tree

0.401

‒ 0.062

‒ 0.226

0.421

Herb cover

0.773

‒ 0.271

0.065

‒ 0.071

Herb density

0.664

‒ 0.221

0.321

0.119

Shrub cover

0.201

0.581

‒ 0.299

‒ 0.015

Shrub density

0.477

0.075

‒ 0.432

0.331

Tree cover

‒ 0.122

0.587

‒ 0.122

‒ 0.007

Leaf litter cover

‒ 0.616

0.255

0.291

0.080

Vegetation type

‒ 0.601

0.021

0.100

‒ 0.147

Percentage of variance explained (%)

19.915

12.460

11.377

8.189

Cumulative percentage (%)

19.915

32.375

43.752

51.941