Ecological Archives E096-036-A3
Adrienne L. Godschalx, Martin Schädler, Julie A. Trisel, Mehmet A. Balkan, and Daniel J. Ballhorn. 2015. Ants are less attracted to the extrafloral nectar of plants with symbiotic, nitrogen-fixing rhizobia. Ecology 96:348–354. http://dx.doi.org/10.1890/14-1178.1
Appendix C. Results of structural equation models.
Table C1. Results of structural equation models. The effects of rhizobia on aboveground plant traits and ant attraction according are shown. Arrows indicate the direction of the effect. Given are the unstandardized path coefficients (estimates), covariances, standard error of regression weights and covariances (SE), the critical values for regression weights and covariances (CR), the levels of significance (P) and information on model fit (χ2, AIC, RMSA).
Variables |
Estimate |
SE |
CR |
P |
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Regression weights |
|
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Shoot biomass |
← |
Rhizobia |
33.284 |
4.248 |
7.836 |
< 0.001 |
Proteins |
← |
Rhizobia |
16.615 |
2.948 |
5.637 |
< 0.001 |
HCN |
← |
Rhizobia |
15.507 |
3.212 |
5.450 |
< 0.001 |
EFN |
← |
Rhizobia |
-1.100 |
0.174 |
-6.430 |
< 0.001 |
Ants |
← |
EFN |
1.506 |
0.229 |
6.567 |
< 0.001 |
Covariances |
|
|||||
HCN |
↔ |
Proteins |
27.44 |
15.781 |
1.739 |
0.082 |
HCN |
↔ |
Shoot biomass |
41.346 |
22.802 |
1.813 |
0.070 |
Proteins |
↔ |
Shoot biomass |
70.114 |
22.463 |
3.121 |
0.002 |
|
|
|
|
|
|
|
χ2 = 3.71, df = 7, p = 0.81 |
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AIC = 31.71 |
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RMSA < 0.001 |
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