Table 6. Permutation distance-based multivariate ANOVA (PERMANOVA) results (based on
Jaccard dissimilarity) to assess thinning and fertilization treatment effects on EM taxa abundance
in lodgepole pine stands in the foothills of Alberta. The experiment was established in 2006 and
laid out as a split plot design with sites (Block) where the whole plot treatment was thinning with
two levels (not thinned (nT) and thinned (T)) and fertilization with three levels (not fertilized
(nF), fertilized (F), and recently fertilized in 2009 (F1)). Treatment effects are considered
statistically significant when P-values are bolded (at α = 0.05, 10 000 permutations). .
Source
Fire-origin
Block
Fertilization
Contrasts
df
SS
Pseudo-F
Pa
CoVb
F1 vs. nF
F vs. nF
F vs. F1
2
2
1
1
1
4
8
3798
3601
1574
2045
1782
5780
13181
1.314
1.246
1.154
1.345
1.227
0.27
0.31
0.38
0.32
0.36
151
118
70
174
110
1445
4
1
4
9
2
1
1
1
1
4394
601
2289
7286
5520
1702
3647
2465
2062
1.919
1.051
0.01
0.39
263
6
572
2.171
1.525
2.921
1.645
1.622
<0.01
0.07
<0.01
0.06
0.05
218
146
239
241
158
0
1
0
0
2062
0
No test
1.652
No test
0.05
163
15
22
19069
36230
Error
Total
Harvest-origin
Block
Thinning
Whole plot error
Whole plot total
Fertilization
F1 vs. nF
F vs. nF
F vs. F1
Thinning × Fertilization
T@F1 vs. T@nF
T@F vs. T@nF
T@F1 vs. T@F
Subplot error
Total
1271
a
Monte Carlo P values were used when the number of unique permutations was low (see Anderson et al. 2008 for
details).
b
Components of variation (see Anderson et al. (2008) for details).
1