Ecological Archives E096-012-A2

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 B. Effects of vegetation diversity (number of plant functional groups).

Table B1. Effects of vegetation diversity (number of plant functional groups (PFGs) on litter decomposition, N mineralization, and soil biota.

Source of variation

df

F P

Diversity differences

 

 

 

Shrub litter decomposition (% mass loss)

 

 

   Warming

1

0.0

0.97

 

   Vegetation diversity

3

0.7

0.57

Not significant

   Warming × diversity

3

0.2

0.88

(at P < 0.05)

 

 

 

 

 

Graminoid litter decomposition (% mass loss)

 

 

   Warming

1

0.6

0.45

 

   Vegetation diversity

3

0.1

0.96

Not significant

   Warming × diversity

3

1.2

0.30

(at P < 0.05)

 

 

 

 

 

Bryophyte litter decomposition (% mass loss)

 

 

   Warming

1

0.1

0.72

 

   Vegetation diversity

3

0.3

0.81

Not significant

   Warming × diversity

3

0.2

0.93

(at P < 0.05)

 

 

 

 

 

N mineralization (µg g dry wt soil-1)

 

 

   Warming

1

2.2

0.14

Significant for 2 PFGs

   Vegetation diversity

3

3.4

0.03

compared with 0 and

   Warming × diversity

3

0.6

0.63

1 PFG.

 

 

 

 

 

Enchytraeid abundance (m-2)

 

 

   Warming

1

3.3

0.07

 

   Vegetation diversity

3

0.6

0.64

Not significant

   Warming × diversity

3

1.3

0.28

(at P < 0.05)

 

 

 

 

 

Diptera larvae abundance (m-2)

 

 

   Warming

1

5.1

0.03

 

   Vegetation diversity

3

1.6

0.20

Not significant

   Warming × diversity

3

1.8

0.15

(at P < 0.05)

 

 

 

 

 

Bacterial community structure

 

 

 

 

   Warming

1

2.2

0.05

 

   Vegetation diversity

3

0.2

0.24

Not significant

   Warming × diversity

3

0.9

0.54

(at P < 0.05)

 

 

 

 

 

Fungal community structure

 

 

 

 

   Warming

1

0.9

0.62

 

   Vegetation diversity

3

1.1

0.45

Not significant

   Warming × diversity

3

1.2

0.09

(at P < 0.05)


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