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Table 1 OLS regression model: association between mean snail density and natural characteristics in Dongting Lake Region

From: Identification of optimum scopes of environmental factors for snails using spatial analysis techniques in Dongting Lake Region, China

Model Fit

R2

Adjusted R2

Log likelihood

AIC

0.14

0.13

−866.91

1743.82

Model Estimation

 

VIF

β

SD

t

P

 

Constant

 

17.04

3.38

5.05

0.00

**

Water- content (%)

1.46

−0.03

0.01

−3.78

0.00

**

Elevation (m)

1.16

0.02

0.03

0.75

0.45

*

PH

1.45

−1.30

0.48

−2.72

0.01

**

Temperature (°C)

1.26

−0.13

0.09

−1.41

0.16

*

Diagnostic Tests

 

Tests

DF

Value

P

Normality of errors

Jarque-Bera

2

0.03

0.99

Heteroskedasticity

Breusch-Pagan

4

12.97

0.01

 

Koenker-Bassett

4

21.06

0.00

 

White

14

54.99

0.00

Spatial dependence

Moran’sI(error)

0.48

14.79

0.00

  1. **P < 0.05, *P > 0.05.