Ecological Archives A016-040-A4

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 D. AIC model rankings, weights (wi), and evidence ratios (ER) of Blackburnian Warbler reoccurrence models.  All models contain stand level variables: Trees>30 + SWD>20*HWD>10.


Model

Name

wi

AIC

ΔAIC

ERa

Hypothesis*


1

BMATRIX2000 + BMATRIX300

0.298

338.37

0.00

1.00

C

2

BMATRIX300

0.198

339.18

0.81

1.50

C

3

BMATRIX2000

0.121

340.18

1.81

2.47

C

4

BLBW2000 + BMATRIX300

0.075

341.13

2.76

3.97

C

5

BLBW300 + BMATRIX2000

0.053

341.81

3.44

5.59

C

6

BMATRIX2000 + Edge

0.048

342.01

3.64

6.17

F

7

BMATRIX2000 + PATCH

0.045

342.15

3.78

6.61

F

8

BLBW2000 + BMATRIX300 + EDGE

0.028

343.09

4.72

10.62

F

9

BLBW2000 + BMATRIX300 + PATCH

0.028

343.10

4.74

10.67

F

10

BLBW300 + BMATRIX2000 + PATCH

0.025

343.36

4.99

12.13

F

11

BLBW300 + BMATRIX2000 + EDGE

0.024

343.43

5.06

12.53

F

12

BMATRIX2000 * EDGE

0.018

344.01

5.64

16.77

NLF

13

BMATRIX2000 * PATCH

0.017

344.14

5.78

17.96

NLF

14

Local variables only

0.007

345.75

7.38

40.03

R

15

BLBW2000

0.004

346.81

8.44

67.96

C

16

BLBW2000 + EDGE

0.003

347.52

9.15

97.21

F

17

BLBW300

0.003

347.54

9.17

98.02

C

18

BLBW2000 + PATCH

0.003

347.90

9.53

117.29

F

19

BLBW2000 * EDGE

0.001

349.50

11.13

261.40

NLF

20

BLBW2000 * PATCH

0.001

349.84

11.47

309.27

NLF

21

Intercept only

0.000

402.74

64.37

9.49*1013

-


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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