Response variables

Predictor variables

Estimate

(z)

Std. Error

t value

Pr(>|t|)

Model 1

Total species richness

Intercept

1.864

0.278

6.719

1.83e−11***

Nitrogen

0.006

0.002

3.037

0.002**

Model 2

Total exotic richness

Intercept

0.128

1.419

0.090

0.929

Nitrogen

0.033

0.012

2.769

0.013*

Phosphorus

0.006

0.004

1.480

0.1561

Model 2a

Total exotic richness

Intercept

−3.129

2.046

−1.529

0.1437

Nitrogen

0.029

0.011

2.623

0.0173*

Ln Phosphorus

0.982

0.444

2.212

0.040*

Model 3

Invasive species richness

Intercept

−0.362

1.214

−0.299

0.768

Nitrogen

0.035

0.009

3.606

0.002**