Ecological Archives M073-001-A4

Martin F. Quigley and William J. Platt. 2003. Composition and structure of seasonally deciduous forests in the Americas. Ecological Monographs 73:87–106.

Appendix D. Split-plot ANOVA of the effects of latitude and category on main stem basal area measured as the log of basal area per 0.0625 ha.

Source   df Mean Square F P
Latitude   4 5.40

3.55

0.1235
(40o + 30o) × (20o + 10o + 0o) 1 13.19 8.68 0.0422*
40o × 30o 1 7.58 4.99 0.0892
20o × (10o + 0o) 1 0.87 0.57 0.4909
10o × 0o 1 0.00 0.00 0.9665
Site (Latitude)   4

1.52

11.83 0.0001*
           
Plot (Site (Latitude))   135 0.13

0.99

0.5251
           
Category   3

168.07

1291.76 0.0001*
(1 + 2 + 3) × 4 1 187.55 1441.50 0.0001*
1 × (2 + 3) 1 278.97 2144.21 0.0001*
2 × 3 1 37.68 289.58 0.0001*
Latitude × Category 12 3.68 28.27 0.0001*

 

(40 + 30) vs. (20 + 10 + 0) × (1 + 2 + 3) vs. 4 1 18.04 138.64 0.0001*
(40 + 30) vs. (20 + 10 + 0) × 1 vs. (2 + 3) 1 2.27 17.48 0.0001*
(40 + 30) vs.(20 + 10 + 0) × 2 vs. 3 1

0.01

0.06 0.8104
40 vs.30 × (1 + 2 + 3) vs. 4 1 13.58 104.35 0.0001*
40 vs. 30 × 1 vs. (2 + 3) 1 0.03 0.19 0.6613
40 vs. 30 × 2 vs. 3 1 0.44 3.36 0.0676
20 vs.(10 + 0) × (1 + 2 + 3) vs. 4 1

0.44

3.35 0.0679
20 vs.(10 + 0) × 1 vs. (2 + 3) 1 0.73 5.60 0.0185*
20 vs. (10 + 0) × 2 vs. 3 1 1.73 13.31 0.0003*
10 vs. 0 × (1 + 2 + 3) vs. 4 1 2.73 20.97 0.0001*
10 vs. 0 × 1 vs. (2 + 3) 1 0.02 0.13 0.7209
10 vs. 0 × 2 vs. 3 1 0.03 0.21 0.6451
Category × Plot (Site (Latitude)) 417 0.13    
           
Total   575      

   Notes: Main effect was latitude with split plot effect of site and a split-split plot effect of categories. Latitude and categories were fixed; site and plot replicates were random. Category legend: (1) shrub layer; (2) subcanopy; (3) canopy; (4) liana. An asterisk denotes statistical significance at = 0.05; R2 = 0.92. The dependent variable was log(basal area).


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