Ecological Archives E088-195-A1

P. A. Niklaus, J. Alphei, C. Kampichler, E. Kandeler, C. Köorner, D. Tscherko, and M. Wohlfender. 2007. Interactive effects of plant species diversity and elevated CO2 on soil biota and nutrient cycling. Ecology 88:3153–3163.

Appendix A. A table of microbial phospholipid fatty acids (PLFA), as functions of plant diversity and atmospheric CO2 treatment.

TABLE A1. Microbial phospholipid fatty acids (PLFA) in June 1998 (peak plant biomass) as function of plant diversity and atmospheric CO2 treatment. Values are means ± 1 SE.

Fatty acid
nmol (g soil)
Diversity and CO2 treatment
 
ANOVA
 
       
 
Low diversity
 
Medium diversity
 
High diversity
 
D
C
D×C
 
 
 
       
 
C
A
E
 
C
A
E
 
C
A
E
 
i14:0 1.18 ± 0.38 0.81 ± 0.08 0.52 ± 0.06   1.02 ± 0.31 1.18 ± 0.32 0.55 ± 0.06   0.74 ± 0.18 0.61 ± 0.24 0.59 ± 0.39  
n.s.
n.s.
n.s.
14:0 0.44 ± 0.28 0.45 ± 0.03 0.35 ± 0.01   0.60 ± 0.14 0.58 ± 0.12 0.17 ± 0.10   0.29 ± 0.18 0.32 ± 0.11 0.30 ± 0.20  
n.s.
n.s.
n.s.
15:0 0.62 ± 0.07 0.44 ± 0.16 0.55 ± 0.03   0.62 ± 0.09 0.89 ± 0.19 0.73 ± 0.05   0.69 ± 0.12 0.42 ± 0.14 0.64 ± 0.12  
*
n.s.
n.s.
i15:0 4.97 ± 0.68 3.05 ± 0.88 3.53 ± 0.06   4.47 ± 0.90 4.48 ± 0.47 3.39 ± 0.26   4.09 ± 0.75 3.73 ± 0.46 3.67 ± 0.73  
n.s.
n.s.
n.s.
a15:0 4.99 ± 0.90 3.88 ± 0.08 3.51 ± 0.14   4.38 ± 0.83 4.49 ± 0.59 3.49 ± 0.29   4.46 ± 0.99 3.89 ± 0.61 4.08 ± 0.95  
n.s.
n.s.
n.s.
16:0 13.36 ± 0.81 11.90 ± 0.38 12.88 ± 0.69   12.05 ± 2.48 13.65 ± 0.60 12.83 ± 0.55   14.17 ± 0.87 12.90 ± 0.85 12.82 ± 1.03  
n.s.
n.s.
n.s.
i16:0 3.87 ± 0.23 3.59 ± 0.12 4.05 ± 0.55   4.00 ± 0.56 4.14 ± 0.14 3.79 ± 0.21   4.40 ± 0.64 4.12 ± 0.47 4.01 ± 0.55  
n.s.
n.s.
n.s.
10Me16:0 10.00 ± 0.59 9.17 ± 0.27 9.42 ± 0.42   9.80 ± 1.52 10.02 ± 0.31 9.73 ± 0.50   10.69 ± 0.37 9.85 ± 0.56 9.65 ± 0.59  
n.s.
n.s.
n.s.
16:1ω5 5.63 ± 0.39 5.24 ± 0.18 5.49 ± 0.29   6.62 ± 0.93 6.16 ± 0.24 5.80 ± 0.28   6.34 ± 0.59 5.78 ± 0.49 5.70 ± 0.51  
n.s.
n.s.
n.s.
16:1ω7 7.41 ± 0.62 6.48 ± 0.18 7.22 ± 0.36   5.81 ± 2.35 7.21 ± 0.09 7.12 ± 0.43   7.99 ± 0.76 7.10 ± 0.44 7.81 ± 0.95  
n.s.
n.s.
n.s.
16:1ω11 1.59 ± 0.14 1.36 ± 0.06 1.54 ± 0.12   1.32 ± 0.27 1.66 ± 0.06 1.52 ± 0.09   1.76 ± 0.18 1.41 ± 0.13 1.31 ± 0.20  
n.s.
n.s.
n.s.
17:0 0.49 ± 0.16 0.54 ± 0.02 0.67 ± 0.08   0.68 ± 0.05 0.67 ± 0.03 0.65 ± 0.03   0.72 ± 0.06 0.61 ± 0.06 0.64 ± 0.03  
n.s.
n.s.
n.s.
i17:0 2.39 ± 0.07 2.20 ± 0.11 2.32 ± 0.21   2.48 ± 0.28 2.53 ± 0.13 2.38 ± 0.10   2.68 ± 0.17 2.42 ± 0.19 2.33 ± 0.13  
n.s.
n.s.
n.s.
cy17:0 4.39 ± 0.34 3.91 ± 0.07 4.59 ± 0.41   4.54 ± 0.61 4.48 ± 0.14 4.69 ± 0.28   5.33 ± 0.28 4.61 ± 0.31 4.78 ± 0.33  
n.s.
n.s.
n.s.
10Me17:0 3.32 ± 0.17 3.64 ± 0.12 3.04 ± 0.09   3.24 ± 0.40 3.70 ± 0.17 2.90 ± 0.16   3.23 ± 0.12 3.93 ± 0.23 3.18 ± 0.15  
n.s.
**/***
n.s.
17:1ω8 1.07 ± 0.33 1.46 ± 0.09 1.72 ± 0.25   1.62 ± 0.18 1.79 ± 0.06 1.62 ± 0.08   1.77 ± 0.20 1.88 ± 0.22 1.83 ± 0.13  
n.s.
n.s.
n.s.
18:0 4.85 ± 0.47 3.98 ± 0.09 6.46 ± 1.13   5.78 ± 0.29 5.05 ± 0.32 4.92 ± 0.30   4.70 ± 0.34 5.04 ± 0.23 4.36 ± 0.19  
n.s.
n.s.
**
18:1ω5 2.06 ± 0.05 2.29 ± 0.16 2.42 ± 0.07   2.24 ± 0.13 2.47 ± 0.16 2.31 ± 0.10   2.36 ± 0.09 2.39 ± 0.11 2.15 ± 0.03  
n.s.
n.s.
n.s.
18:1ω7 20.00 ± 1.39 20.26 ± 0.76 21.25 ± 2.42   18.99 ± 2.45 21.18 ± 1.04 21.75 ± 1.01   22.15 ± 0.70 22.69 ± 0.80 22.04 ± 0.65  
n.s.
n.s.
n.s.
18:1ω9 15.12 ± 1.27 14.35 ± 0.42 15.78 ± 1.69   15.00 ± 1.47 16.20 ± 0.70 15.91 ± 0.59   16.65 ± 0.57 16.77 ± 0.88 15.84 ± 0.72  
n.s.
n.s.
n.s.
18:2ω6,9 4.13 ± 0.51 3.32 ± 0.27 5.12 ± 0.07   4.59 ± 0.44 4.36 ± 0.40 4.83 ± 0.25   4.72 ± 0.37 4.58 ± 0.52 4.12 ± 0.33  
n.s.
n.s.
n.s.
10Me18:0 4.54 ± 0.39 4.69 ± 0.24 4.62 ± 0.55   4.63 ± 0.38 5.20 ± 0.22 4.76 ± 0.19   4.96 ± 0.06 5.49 ± 0.27 4.72 ± 0.22  
n.s.
n.s.
n.s.
19:1ω7 1.12 ± 0.08 1.23 ± 0.07 1.09 ± 0.16   1.02 ± 0.14 1.23 ± 0.07 1.19 ± 0.06   1.25 ± 0.04 1.28 ± 0.09 1.22 ± 0.06  
n.s.
n.s.
n.s.
19:1ω8 10.46 ± 0.68 10.50 ± 0.37 9.39 ± 1.25   8.94 ± 1.11 9.87 ± 0.55 10.10 ± 0.46   10.65 ± 0.29 10.14 ± 0.69 10.02 ± 0.50  
n.s.
n.s.
n.s.
cy19:0 2.07 ± 0.14 2.31 ± 0.15 1.97 ± 0.02   2.56 ± 0.63 3.16 ± 0.36 2.54 ± 0.10   2.50 ± 0.17 2.59 ± 0.18 2.47 ± 0.26  
n.s.
n.s.
n.s.
20:0 0.70 ± 0.03 0.71 ± 0.02 0.82 ± 0.01   0.77 ± 0.05 0.79 ± 0.02 0.60 ± 0.18   0.80 ± 0.03 0.80 ± 0.04 0.73 ± 0.01  
n.s.
n.s.
n.s.
Total 130.76 ± 9.50 121.79 ± 3.88 130.31 ± 8.49   127.77 ± 16.60 137.15 ± 4.63 130.29 ± 5.83   140.09 ± 7.85 135.35 ± 7.38 131.00 ± 8.61  
n.s.
n.s.
n.s.
bact.:fungi 17.72 ± 3.02 19.58 ± 1.25 13.05 ± 1.20   14.45 ± 1.99 16.99 ± 1.61 14.13 ± 0.69   15.86 ± 1.15 16.19 ± 1.97 17.14 ± 1.36  
n.s.
n.s.
n.s.

   Note: CO2 treatment: C = unscreened control plots, A = screened ambient CO2 plots, E = screened elevated CO2 plots.

† D = diversity.

‡ C = effect of windscreen alone/effect of elevated CO2 within windscreen.

*P < 0.1; **P < 0.01; ***P < 0.001.


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