Ecological Archives E096-012-A1

Susan E. Ward, Kate H. Orwin, Nicholas J. Ostle, Maria J. I. Briones, Bruce C. Thomson, Robert I. Griffiths, Simon Oakley, Helen Quirk, and Richard D. Bradgett. 2015. Vegetation exerts a greater control on litter decomposition than climate warming in peatlands. Ecology 96:113123. http://dx.doi.org/10.1890/14-0292.1

Appendix A. Effects of warming and plant functional groups on litter mass loss.

Table A1. Effects of warming, the presence/absence of plant functional groups, and interactions between warming and plant functional group presence, on litter mass loss for: (a) All litter species (means), (b) Calluna litter, (c) Eriophorum litter, and (d) Hypnum litter.

Source of variation

df

F

P

df

F

P

 

Year 1

Year 2

a) All litter

 

 

   Litter species identity

2

42.9

<0.0001

2

3.1

0.05

   Warming

1

0.0

0.95

1

1.7

0.20

   Shrub presence/absence

1

1.2

0.27

1

12.9

0.0004

   Graminoid presence/absence

1

0.2

0.64

1

2.2

0.14

   Bryophyte presence/absence

1

2.1

0.15

1

1.5

0.22

   Warming × shrub

1

0.1

0.78

1

3.9

0.05

   Warming × graminoid

1

0.8

0.37

1

0.1

0.75

Warming × bryophyte

1

1.7

0.20

1

0.6

0.43

 

 

 

 

 

 

 

b) Calluna litter

 

 

 

 

 

 

   Warming

1

0.1

0.83

1

0.0

0.98

   Shrub presence/absence

1

1.8

0.18

1

2.9

0.10

   Graminoid presence/absence

1

0.7

0.40

1

0.3

0.59

   Bryophyte presence/absence

1

0.0

0.96

1

0.0

0.89

   Warming × shrub

1

0.6

0.44

1

0.9

0.35

   Warming × graminoid

1

0.2

0.62

1

0.5

0.47

Warming × bryophyte

1

0.3

0.57

1

0.0

0.97

 

 

 

 

 

 

 

c) Eriophorum litter

 

 

 

 

 

 

   Warming

1

0.2

0.63

1

1.7

0.20

   Shrub presence/absence

1

1.4

0.24

1

6.9

0.01

   Graminoid presence/absence

1

0.0

0.85

1

1.7

0.20

   Bryophyte presence/absence

1

0.1

0.75

1

0.5

0.47

   Warming × shrub

1

0.1

0.73

1

0.4

0.54

   Warming × graminoid

1

0.0

0.99

1

0.6

0.45

Warming × bryophyte

1

0.0

0.93

1

1.0

0.32

 

 

 

 

 

 

 

d) Hypnum litter

 

 

 

 

 

 

   Warming

1

0.1

0.75

1

0.9

0.34

   Shrub presence/absence

1

0.0

0.90

1

1.5

0.04

   Graminoid presence/absence

1

1.7

0.20

1

2.5

0.12

   Bryophyte presence/absence

1

4.5

0.04

1

1.6

0.22

   Warming × shrub

1

0.1

0.76

1

2.4

0.13

   Warming × graminoid

1

0.9

0.36

1

0.1

0.76

Warming × bryophyte

1

1.7

0.20

1

0.2

0.64

P values in bold are statistically significant (P < 0.05).


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