Ecological Archives M085-018-A7

Jon D. Witman, Robert W. Lamb, Jarrett E. K. Byrnes. 2015. Towards an integration of scale and complexity in marine ecology. Ecological Monographs 85:475–504. http://dx.doi.org/10.1890/14-2265.1

Appendix G. Structural equation modeling (SEM) results.

Table G1. Results of Structural Equation Modeling (SEM). lavaan (0.5-17) converged normally after 244 iterations.

Number of observations

310

 

 

 

Estimator

ML

Robust

Minimum Function Test Statistic

13.492

16.192

Degrees of freedom

9

9

P value (Chi-square)

0.142

0.063

Scaling correction factor for the Satorra-Bentler correction

 

0.833

 

 

Parameter estimates

 

 

Information

Expected

 

Standard Errors

Robust.sem

 

From

To

Estimate

Std.err

Z-value

P(>|z|)

Standardized Estimate

Latent variables:

Experiment Complexity

Log Species

1

0.431

0.47

Treatment Combinations

5.589

1.378

4.055

0

0.373

Factors

1.111

0.312

3.565

0

0.366

Regressions:

Log Duration

Year

-0.004

0.008

-0.529

0.597

-0.03

Log Spatial Grain

Year

-0.019

0.007

-2.869

0.004

-0.186

Log Spatial Extent

Year

0.032

0.006

5.144

0

0.286

Log Spatial Grain

0.416

0.046

9.001

0

0.382

Experiment Complexity

Year

0.004

0.003

1.309

0.19

0.129

Log Duration

0.11

0.025

4.448

0

0.432

Log Spatial Extent

0.083

0.035

2.342

0.019

0.27

Log Spatial Grain

-0.131

0.03

-4.408

0

-0.393

Covariances:

Treatment Combinations

Factors

2.994

0.853

3.51

0

0.411

Intercepts:

Log Species

-7.037

6.626

-1.062

0.288

-7.679

Treatment Combinations

-45.89

38.106

-1.204

0.228

-7.116

Factors

-7.697

7.387

-1.042

0.297

-5.883

Log Duration

12.789

15.169

0.843

0.399

7.569

Log Spatial Grain

38.536

13.212

2.917

0.004

29.795

Log Spatial Extent

-59.727

12.302

-4.855

0

-42.353

ExptComplexty

0

0

0

Variances:

Log Species

0.654

0.086

0.654

0.779

Treatment Combinations

35.794

7.989

35.794

0.861

Factors

1.483

0.39

1.483

0.866

Log Duration

2.852

0.214

2.852

0.999

Log Spatial Grain

1.615

0.245

1.615

0.965

Log Spatial Extent

1.617

0.138

1.617

0.813

ExptComplexty

0.114

0.06

0.613

0.613

R-Square:

Log Species

0.221

Treatment Combinations

0.139

Factors

0.134

Log Duration

0.001

Log Spatial Grain

0.035

Log Spatial Extent

0.187

Experiment Complexity

0.387


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