Ecological Archives M085-015-A2

Chengjin Chu and Peter B. Adler. 2015. Large niche differences emerge at the recruitment stage to stabilize grassland coexistence. Ecological Monographs 85:373392. http://dx.doi.org/10.1890/14-1741.1

Appendix B. The spatial scale of species interactions.

Comparison of three methods for calculating δ values for interspecific interactions based on δ values for intraspecific interactions. The ‘Effects’ model assumes that each species affects other species within a characteristic zone of influence, the ‘Responses’ model assumes that each species responds to neighbors within a characteristic zone of influence, and the ‘Interactions’ model assumes that the optimal value is an average of the effects and responses. Shown are AIC values for a growth and survival model for each species. Bold type indicates the best model for each species and vital rate. See the section Summary of study sites and species selection in Materials and Methods for the abbreviations for species names.

Study site

Species

Vital rate

Effects model

Responses model

Interactions model

SD, AZ

BOER

Growth

7871.59

7871.60

7867.29

 

 

Survival

2996.30

2996.96

2996.56

 

BORO

Growth

24424.15

24490.68

24437.24

 

 

Survival

15495.11

15498.25

15496.60

SS, ID

ARTR

Growth

3231.42

3230.89

3230.95

 

 

Survival

1245.77

1246.09

1246.61

 

HECO

Growth

7060.04

7063.67

7062.58

 

 

Survival

3102.22

3097.47

3100.23

 

POSE

Growth

10521.39

10525.27

10523.49

 

 

Survival

4672.50

4675.63

4674.16

 

PSSP

Growth

13193.22

13207.84

13198.74

 

 

Survival

4927.21

4938.68

4932.18

SMP, KS

BOCU

Growth

2573.58

2562.44

2569.59

 

 

Survival

1448.84

1449.22

1448.95

 

BOHI

Growth

1638.38

1639.19

1639.01

 

 

Survival

808.62

809.70

808.95

 

SCSC

Growth

1283.37

1288.61

1284.36

 

 

Survival

685.16

684.82

685.19

NMP, MT

BOGR

Growth

12609.67

12609.24

12609.72

 

 

Survival

5223.53

5222.41

5222.96

 

HECO

Growth

5634.54

5639.37

5636.62

 

 

Survival

2904.24

2903.68

2904.15

 

PASM

Growth

15298.78

15303.47

15300.42

 

 

Survival

9542.60

9542.11

9542.32

 

POSE

Growth

8426.74

8430.96

8429.04

 

 

Survival

4151.88

4152.22

4152.04

CD, NM

BOER

Growth

23740.99

23748.29

23744.76

 

 

Survival

12712.28

12712.26

12712.27

 

SPFL

Growth

6061.84

6067.83

6063.90

 

 

Survival

3294.02

3294.24

3294.13


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