Ecological Archives A017-078-A3

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 C. Model parameters for the models shown in Table 4.

Log Amass


Term

 

Estimate

Std Error

t Ratio

Prob > |t|

Intercept

 

0.960517

0.120222

7.99

<.0001

Phylogeny [angiosperm]

 

0.1011001

0.016985

5.95

<.0001

GF [Grasses]

 

0.0869297

0.025521

3.41

0.0007

GF [Herbs]

 

0.0888209

0.01742

5.10

<.0001

GF [Shrubs]

 

-0.08568

0.015509

-5.52

<.0001

Leaf habit [D]

 

0.0758514

0.010905

6.96

<.0001

Mean annual temperature

 

0.005037

0.0017

2.96

0.0031

Log precipitation

 

-0.227137

0.036081

-6.30

<.0001

Log vapor pressure deficit

 

-0.158961

0.065606

-2.42

0.0156

Solar radiation

 

0.001562

0.000526

2.97

0.0031

Specific leaf area

 

0.6665043

0.040232

16.57

<.0001

Log leaf life-span


Term

 

Estimate

Std Error

t Ratio

Prob > |t|

Intercept

 

1.4597912

0.144144

10.13

<.0001

Phylogeny [angiosperm]

 

-0.145331

0.020674

-7.03

<.0001

GF [Grasses]

 

-0.125831

0.02995

-4.20

<.0001

GF [Herbs]

 

-0.102021

0.02064

-4.94

<.0001

GF [Shrubs]

 

0.0845984

0.017923

4.72

<.0001

Leaf habit [D]

 

-0.200433

0.01245

-16.10

<.0001

Mean annual temperature

 

0.0016746

0.002342

0.71

0.4749

Log precipitation

 

0.0376154

0.047367

0.79

0.4274

Log vapor pressure deficit

 

-0.347073

0.095553

-3.63

0.0003

Solar radiation

 

0.0021076

0.000668

3.15

0.0017

Specific leaf area

 

-0.521804

0.048812

-10.69

<.0001

Log Pmass


Term

 

Estimate

Std Error

t Ratio

Prob > |t|

Intercept

 

-1.224389

0.189997

-6.44

<.0001

Phylogeny [angiosperm]

 

-0.137065

0.027684

-4.95

<.0001

GF [Grasses]

 

-0.107276

0.059879

-1.79

0.0736

GF [Herbs]

 

-0.07396

0.081915

-0.90

0.3669

GF [Shrubs]

 

0.0229485

0.034264

0.67

0.5032

Leaf habit [D]

 

0.0363773

0.013156

2.77

0.0058

Mean annual temperature

 

-0.002133

0.00267

-0.80

0.4246

Log precipitation

 

-0.204015

0.036513

-5.59

<.0001

Log vapor pressure deficit

 

0.4022057

0.100084

4.02

<.0001

Solar radiation

 

-0.003714

0.000761

-4.88

<.0001

Specific leaf area

 

0.8088485

0.039286

20.59

<.0001

Log Nmass


Term

 

Estimate

Std Error

t Ratio

Prob > |t|

Intercept

 

-0.458369

0.059528

-7.70

<.0001

Phylogeny [angiosperm]

 

0.0015845

0.009715

0.16

0.8705

GF [Grasses]

 

-0.053386

0.013702

-3.90

0.0001

GF [Herbs]

 

0.0323564

0.008915

3.63

0.0003

GF [Shrubs]

 

-0.026247

0.007775

-3.38

0.0008

Leaf habit [D]

 

0.0104269

0.004917

2.12

0.0341

Mean annual temperature

 

-0.000368

0.000946

-0.39

0.6977

Log precipitation

 

-0.105158

0.01489

-7.06

<.0001

Log vapor pressure deficit

 

0.0681075

0.032477

2.10

0.0361

Solar radiation

 

-0.000665

0.000243

-2.74

0.0062

Specific leaf area

 

0.5566192

0.016405

33.93

<.0001

 

 

 

 

 

 

"Angiosperm" represents parameter values used in estimating the dependent variable if the species belongs to that phylogenetic group. "Grasses", "herbs", and "shrubs" represent parameter values used in estimating the dependent variable if the species belongs to that growth form (GF). "D" represents parameter values used in estimating the dependent variable if the species belongs to that phenological group (deciduous). 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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