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Table 2 Polynomial regressions of species richness patterns along the elevational gradient

From: Elevational patterns of bird species richness on the eastern slope of Mt. Gongga, Sichuan Province, China

Regressions

Total species

Large-ranged species

Small-ranged species

First-order r2

0.46

0.157

0.767*

AIC

75.799

75.548

61.308

Second-order r2

0.956*

0.958*

0.858*

AIC

68.654

60.861

66.666

Third-order r2

0.99*

0.963*

0.944*

AIC

79.421

78.623

77.91

  1. Numbers in italics indicate the best regression model selected by lowest AIC value
  2. *Significant at p < 0.01