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Table 8 General linear model of Sqrt(gull abundance)

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

Independent variable

Effect

df

 SS

F Ratio

 P

Intercept

5.01

   

<.0001

Slope

−0.27

1

70.05

5.13

0.024

Month

 

11

602.81

4.02

<.0001

Year

 

3

93.69

2.29

0.078

Sqrt(% algal wrack)

0.01

1

0.11

0.01

0.9292

Sqrt(Distance to estuary)

−0.02

1

216.49

15.87

<.0001

Sqrt(Human activity)

−0.03

1

1.95

0.14

0.7052

Tide

0.22

1

15.20

1.11

0.2919

Month*Tide

 

11

344.42

2.30

0.01

Tide*Slope

−0.04

1

4.91

0.36

0.5491

# observers

 

1

37.58

2.75

0.0978

G

 

1

57.84

4.24

0.0402

W

 

1

28.38

2.08

0.15

F

 

1

19.63

1.44

0.2311

K

 

1

46.63

3.42

0.0653

T

 

1

36.09

2.65

0.1047

N

 

1

18.78

1.38

0.2414

C

 

1

1.23

0.09

0.7644

B

 

1

0.86

0.06

0.8015

  1. R-square = 0.29, F40,379 = 4.00, P <.0001. Estuary refers to the inverse of the shortest distance from the transect to an estuary. Letter codes refer to observers.