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Table 1 Model results for S. acaulis response to simulated global change

From: Simulated global change: contrasting short and medium term growth and reproductive responses of a common alpine/Arctic cushion plant to experimental warming and nutrient enhancement

a) Stem elongation

    

Factor effects

df

MS

F value

p

Temperature

1

4.227

27.496

<0.0001

Nutrient

1

9.731

63.298

<0.0001

Year

1

0.956

6.221

0.02

Nutrient x Year

1

0.093

0.611

0.44

Temperature x Year

1

0.200

1.306

0.26

Nutrient x Temperature

1

0.030

0.196

0.66

Temp x Nutrient x Year

1

0.266

1.732

0.19

Residual

52

0.153

  

b ) Leaf length

    

Factor effects

df

MS

F value

p

Temperature

1

0.242

11.598

0.001

Nutrient

1

0.357

17.076

< 0.001

Year

1

0.204

9.783

0.003

Nutrient x Year

1

0.006

0.263

0.61

Temperature x Year

1

< 0.001

0.005

0.94

Nutrient x Temperature

1

< 0.001

0.002

0.97

Temp x Nutrient x Year

1

0.009

0.447

0.51

Residual

52

0.021

  

c ) Cover

    

Factor effects

df

MS

F value

p

Temperature

1

197.928

8.849

0.003

Nutrient

1

33.660

1.505

0.22

Year

1

23.100

1.033

0.31

Nutrient x Year

1

183.143

8.188

0.005

Temperature x Year

1

10.968

0.490

0.49

Nutrient x Temperature

1

59.083

2.642

0.10

Temp x Nutrient x Year

1

17.594

0.787

0.38

Residual

88

22.368

  

d ) Fruit production

    

Factor effects

df

MS

F value

p

Temperature

1

15.782

10.096

0.002

Nutrient

1

0.601

0.385

0.54

Year

1

9.791

6.264

< 0.001

Nutrient x Year

1

6.356

4.066

0.002

Temperature x Year

1

1.762

1.127

0.35

Nutrient x Temperature

1

5.161

3.302

0.07

Temp x Nutrient x Year

1

1.460

0.934

0.46

Residual

96

1.563

  
  1. Analyses of variance for a) stem elongation (log transformed) 1996–1998, b) leaf length 1996–1998, c) cover 1995–2001, and (d) fruit production (log transformed) 1995–2000 of Silene acaulis. The factor and interaction effects are from a three factor ANOVA with Temperature, Nutrient and Year as fixed factors.