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Table 1 Relationships between resident bird species richness, phylogenetic structure (Phylo NRI), functional structure (Funct NRI) and each associated variable by ordinary least squares (OLS) and simultaneous autoregressive (SAR) models

From: Precipitation is the dominant driver for bird species richness, phylogenetic and functional structure in university campuses in northern China

  Species richness Phylo NRI Funct NRI
Coef_ols r2_ols Coef_sar r2_sar Coef_ols r2_ols Coef_sar r2_sar Coef_ols r2_ols Coef_sar r2_sar
MAT 0.52 0.27* 0.52 0.31** − 0.22 0.05 − 0.17 0.13 − 0.18 0.03 − 0.15 0.04
MAP 0.45 0.20* 0.44 0.22* − 0.23 0.05 − 0.66 0.38** − 0.54 0.29* − 0.55 0.41**
VeloMAT 0.05 0 0.06 0.04 0.28 0.08 0.14 0.12 0 0 − 0.04 0.02
VeloMAP − 0.31 0.10 − 0.31 0.13 0.30 0.09 0.24 0.15 0.22 0.05 0.20 0.06
PlantSR 0.52 0.27* 0.49 0.27** 0.16 0.03 0.06 0.10 − 0.10 0.01 − 0.20 0.05
Area 0.02 0 0.04 0.04 0.18 0.03 0.14 0.12 0.29 0.08 0.30 0.11
Age − 0.16 0.02 − 0.14 0.06 − 0.25 0.06 − 0.19 0.14 − 0.19 0.04 − 0.22 0.06
Population 0.09 0.01 − 0.04 0.04 − 0.06 0 − 0.01 0.10 − 0.13 0.02 − 0.26 0.08
  1. MAT and MAP are mean annual temperature and precipitation. VeloMAT and VeloMAP are glacial-interglacial velocity in MAT and MAP. PlantSR is plant species richness. Area, Age and Population are campus area, age and population density. Coefficients (Coef) and r2 were given. And r2 of significant variables were in italics. *p < 0.05; **p < 0.01