Ecological Archives A017-078-A2

Peter B. Reich, Ian J. Wright, and Christopher H. Lusk. 2007. Predicting leaf physiology from simple plant and climate attributes: a global GLOPNET analysis. Ecological Applications 17:1982–1988.

Appendix B. Model parameters for the models shown in Table 2.

Log leaf life-span


Term

 

Estimate

Std Error

t Ratio

Prob > |t|

Intercept

 

0.1536809

0.214663

0.72

0.4743

Mean annual temperature

 

0.000999

0.003634

0.27

0.7835

Log precipitation

 

0.040113

0.074788

0.54

0.5919

Log vapor pressure deficit

 

-0.117623

0.155508

-0.76

0.4497

Solar radiation

 

0.004345

0.00115

3.78

0.0002

Log specific leaf area

Term

 

Estimate

Std Error

t Ratio

Prob > |t|

Intercept

 

2.1281057

0.086984

24.47

<.0001

Mean annual temperature

 

-0.005184

0.00118

-4.39

<.0001

Log precipitation

 

0.1829269

0.023355

7.83

<.0001

Log vapor pressure deficit

 

0.1153142

0.052204

2.21

0.0273

Solar radiation

 

-0.003865

0.000388

-9.97

<.0001

Log Nmass

Term

 

Estimate

Std Error

t Ratio

Prob > |t|

Intercept

 

0.5168357

0.074126

6.97

<.0001

Mean annual temperature

 

0.0027665

0.00117

2.36

0.0182

Log precipitation

 

0.0458037

0.020263

2.26

0.0239

Log vapor pressure deficit

 

0.0119454

0.044116

0.27

0.7866

Solar radiation

 

-0.003129

0.000326

-9.59

<.0001

Log Pmass


Term

 

Estimate

Std Error

t Ratio

Prob > |t|

Intercept

 

0.182473

0.269135

0.68

0.4980

Mean annual temperature

 

0.0156774

0.003598

4.36

<.0001

Log precipitation

 

0.0315401

0.048678

0.65

0.5172

Log vapor pressure deficit

 

0.4161753

0.142869

2.91

0.0037

Solar radiation

 

-0.009772

0.001069

-9.14

<.0001

Log Amass


Term

 

Estimate

Std Error

t Ratio

Prob > |t|

Intercept

 

2.5682494

0.177518

14.47

<.0001

Mean annual temperature

 

0.0006909

0.002583

0.27

0.7892

Log precipitation

 

-0.14263

0.054529

-2.62

0.0091

Log vapor pressure deficit

 

-0.144788

0.108875

-1.33

0.1840

Solar radiation

 

-0.001432

0.000863

-1.66

0.0974

Amass: photosynthetic capacity per unit leaf mass; Nmass: leaf nitrogen concentration per unit mass; Pmass: leaf phosphorous concentration per unit mass.



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