Ecological Archives E091-172-A3

Peter N. Epanchin, Roland A. Knapp, and Sharon P. Lawler. 2010. Nonnative trout impact an alpine-nesting bird by altering aquatic insect subsidies. Ecology 91:2406–2415.

Appendix C. AICc rankings of models testing the relationship between fish presence and habitat variables.

TABLE C1. AICc rankings of logistic regression models testing the relationship between fish presence and all combinations of up to three of the six habitat variables at all 26 lakes.

Habitat variable

k

AICc

Δ AICc

w

perimeter

2

39.02

0.00

0.093

surface area

2

39.25

0.23

0.083

depth

2

39.91

0.89

0.059

perimeter:surface area

2

40.09

1.08

0.054

elevation

2

40.30

1.28

0.049

tree density

2

40.54

1.52

0.043

perimeter2

3

41.13

2.11

0.032

perimeter, perimeter:surface area

3

41.31

2.29

0.030

elevation, perimeter

3

41.47

2.46

0.027

depth2

3

41.55

2.53

0.026

tree density, perimeter

3

41.55

2.54

0.026

surface area, perimeter:surface area

3

41.57

2.56

0.026

surface area, perimeter

3

41.59

2.57

0.026

perimeter, depth

3

41.59

2.57

0.026

tree density2

3

41.61

2.59

0.025

elevation, surface area

3

41.64

2.62

0.025

surface area2

3

41.66

2.64

0.025

tree density, surface area

3

41.77

2.75

0.023

surface area, depth

3

41.77

2.75

0.023

perimeter:surface area2

3

42.23

3.21

0.019

elevation, perimeter:surface area

3

42.29

3.27

0.018

perimeter:surface area, depth

3

42.39

3.37

0.017

elevation, depth

3

42.44

3.42

0.017

tree density, depth

3

42.48

3.46

0.016

elevation2

3

42.60

3.58

0.015

tree density, perimeter:surface area

3

42.64

3.62

0.015

tree density, elevation

3

42.87

3.85

0.014

surface area, perimeter, perimeter:surface area

4

44.06

5.04

0.007

tree density, perimeter, perimeter:surface area

4

44.09

5.07

0.007

elevation, perimeter, perimeter:surface area

4

44.11

5.09

0.007

perimeter, perimeter:surface area, depth

4

44.12

5.10

0.007

elevation, perimeter, depth

4

44.27

5.25

0.007

elevation, surface area, perimeter

4

44.28

5.27

0.007

tree density, elevation, perimeter

4

44.29

5.27

0.007

surface area, perimeter:surface area, depth

4

44.31

5.30

0.007

elevation, surface area, perimeter:surface area

4

44.32

5.30

0.007

tree density, surface area, perimeter:surface area

4

44.32

5.30

0.007

tree density, perimeter, depth

4

44.36

5.34

0.006

tree density, surface area, perimeter

4

44.37

5.35

0.006

surface area, perimeter, depth

4

44.40

5.38

0.006

tree density, elevation, surface area

4

44.45

5.43

0.006

elevation, surface area, depth

4

44.45

5.43

0.006

tree density, surface area, depth

4

44.56

5.54

0.006

elevation, perimeter:surface area, depth

4

45.05

6.03

0.005

tree density, elevation, perimeter:surface area

4

45.09

6.07

0.004

tree density, perimeter:surface area, depth

4

45.20

6.18

0.004

tree density, elevation, depth

4

45.23

6.21

0.005

Note: Models ranked in order of minimum AICc value; w = Akaike weight
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