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Table 11 Ordinal linear model of landbird richness

From: Temporal and spatial variation in bird and human use of beaches in southern California

Independent variable

Effect

df

Chi-Square

 P

Slope

0.06

1

0.52

0.4729

Month

 

11

21.42

0.0293

Year

 

3

10.51

0.0147

Sqrt(% algal wrack)

0.16

1

3.02

0.0825

Sqrt(Distance to estuary)

0.01

1

11.73

0.0006

Sqrt(Human activity)

0.03

1

0.43

0.5104

Tide

0.06

1

0.16

0.6937

Month*Tide

 

11

8.52

0.6664

Tide*Slope

−0.10

1

5.15

0.0232

# observers

 

1

1.07

0.3

G

 

1

1.56

0.2114

W

 

1

0.28

0.5955

F

 

1

0.91

0.3397

K

 

1

0.18

0.6688

T

 

1

1.26

0.2626

N

 

1

0.26

0.6073

C

 

1

2.17

0.1405

B

 

1

0.08

0.7723

  1. R-square = 0.13, ChiSquare = 89.27 DF = 40, P <.0001. Estuary refers to the inverse of the shortest distance from the transect to an estuary. Letter codes refer to observers. Effect sign is negative to that given in statistical output to indicate the effect of the independent variable on the dependent variable as in a General Linear Model.
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