Appendix A. Mixed-model ANOVA for culm density in censuses 1 and 3, with orthogonal individual degree-of-freedom contrasts.
TABLE A1. Mixed-model ANOVA for culm density (number/m2) in censuses 1 and 3, with orthogonal individual degree-of-freedom contrasts. Fire treatment has two levels, burned and unburned. Stand Type has three levels, discrete blowdown, discrete canopy, and continuous canopy. Ndf = numerator degrees of freedom; Ddf = denominator degrees of freedom based on Kenward-Roger approximation.
Source of variation: |
Ndf |
Ddf |
F |
P |
Census 1 fixed effects on culm density |
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Stand type |
2 |
23.8 |
0.12 |
0.8907 |
Fire (burned × unburned) |
1 |
23.8 |
0.00 |
0.9944 |
Stand type × fire |
2 |
23.8 |
0.60 |
0.5554 |
Individual degree of freedom contrasts |
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(Blowdown × canopy) × (burned × unburned) |
1 |
23.9 |
0.26 |
0.6130 |
(Discrete canopy × continuous) × (burned × unburned) |
1 |
23.7 |
0.94 |
0.3424 |
Census 3 fixed effects on culm density |
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Stand type |
2 |
27 |
19.27 |
<.0001 |
Fire |
1 |
27 |
5.29 |
0.0294 |
Stand type × fire |
2 |
27 |
2.42 |
0.1084 |
Individual degree-of-freedom contrasts |
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(Blowdown × canopy) × (burned × unburned) |
1 |
28 |
4.59 |
0.0410 |
(Discrete canopy × continuous) × (burned × unburned) |
1 |
26 |
0.26 |
0.6157 |