Ecological ArchivesE087-191-A6

Sabrina E. Russo, Stephen Portnoy, and Carol K. Augspurger. 2006. Incorporating animal behavior into seed dispersal models: implications for seed shadows. Ecology 87:3160–3174.

Appendix F. Summary of parameter estimates, negative log-likelihood score, and Akaike’s Information Criterion (AIC) for the mixture distribution fit to the simulated seed-dispersal curve for each source tree.

Source tree

Non-dispersed seeds

Sleeping site seeds

In-transit site seeds (< 500 m)

In-transit site seeds (≥ 500 m)

-L

AIC
 

Gaussian

Weibull

Lognormal

Gaussian

    
 

shape

scale

   

3

5.01

1.99

1.35

158.40

5.24

0.21

846.65

174.36

21627

43270

4

5.01

1.97

1.66

213.11

3.85

1.47

725.58

292.56

970

1956

5

4.49

1.71

5.71

240.21

4.59

1.11

896.00

166.25

9724

19464

6

5.00

2.00

1.41

159.66

4.60

0.99

970.05

78.78

1862

3740

7

5.12

1.63

1.80

184.85

4.84

0.56

904.94

157.74

12049

24114

8

3.17

1.25

5.92

223.40

4.96

0.98

907.99

114.16

1432

2880

11

5.63

2.15

4.71

219.11

2.99

1.18

745.52

268.06

64283

128582

12

3.60

1.27

1.03

153.60

5.21

0.20

923.26

129.65

1889

3794

13

2.73

1.09

2.83

195.50

4.46

1.12

882.89

135.72

11787

23590

16

3.33

1.23

1.30

113.59

5.38

0.22

883.08

192.06

11847

23710

17

5.32

2.13

1.44

174.06

5.08

0.42

886.94

172.44

10637

21290

19

3.39

1.22

2.82

243.34

3.15

0.33

850.00

196.51

13475

26966

All seeds

5.05

2.15

3.26

221.97

4.50

1.71

901.50

121.23

174256

348528

   Notes: Summary of parameter estimates, negative log-likelihood score (-L), and Akaike’s Information Criterion (AIC) for an 8-parameter mixture distribution fit to the simulated seed-dispersal curve for each source tree with > 200 seeds and for all seeds from all 19 source trees. Source tree numbers correspond to those in Appendix A. The mixture distribution for all seeds is plotted in Fig. 5b.


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