Ecological Archives A016-040-A6

Matthew G. Betts, Graham J. Forbes, Antony W. Diamond, and Philip D. Taylor. 2006. Independent effects of fragmentation on forest songbirds: an organism-based approach. Ecological Applications 16:1076–1089.

Appendix F. AIC model rankings, weights (wi), and evidence ratios (ER) of Ovenbird models for 2003. All models contain stand level variables: HWDBA + CANCOV.


Model

Name

wi

AIC

ΔAIC

ER

Hypothesis*


1

OVEN2000 * PATCH

0.196

438.73

0.00

1.00

NLF

2

OVEN300

0.189

438.80

0.07

1.03

C

3

OVEN300 + OVEN2000 * PATCH

0.146

439.33

0.59

1.34

NLF

4

OVEN2000

0.079

440.55

1.82

2.48

C

5

OVEN300 + OMATRIX2000

0.078

440.59

1.85

2.52

C

6

OMATRIX2000 * PATCH

0.075

440.66

1.92

2.61

NLF

7

OVEN300 + OMATRIX2000 + PATCH

0.032

442.37

3.64

6.16

F

8

OVEN300 + OMATRIX2000 + EDGE

0.030

442.46

3.73

6.44

F

9

Local variables only

0.029

442.53

3.79

6.66

R

10

OVEN2000 + EDGE

0.029

442.58

3.84

6.82

F

11

OVEN2000 + PATCH

0.028

442.59

3.86

6.89

F

12

OVEN2000 * EDGE

0.020

443.34

4.61

10.01

NLF

13

OVEN2000 + OMATRIX500

0.016

443.74

5.00

12.19

C

14

OMATRIX2000

0.012

444.33

5.59

16.40

C

15

OMATRIX300

0.011

444.55

5.81

18.30

C

16

OMATRIX2000 + EDGE

0.008

445.01

6.28

23.07

F

17

OMATRIX2000 + PATCH

0.008

445.15

6.42

24.75

F

18

OVEN2000 + OMATRIX300 + PATCH

0.007

445.50

6.76

29.38

F

19

OVEN2000 + OMATRIX300 + EDGE

0.007

445.50

6.76

29.38

F

20

OMATRIX2000 * EDGE

0.002

448.22

9.48

114.61

NLF

21

Intercept only

0.000

470.45

31.71

7.70*106

-


Notes: *Hypotheses are: random sample (R), landscape composition (C), landscape fragmentation (F), nonlinear fragmentation (NLF).

See Appendix A for variable descriptions.



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