Ecological Archives M073-001-A3

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

Appendix C. Split-plot ANOVA of the effects of latitude and category on species composition measured as the proportion of species (present at site) per category per 1/16 ha.

Source   df Mean Square F P
Latitude   4 0.06 0.63 0.6675
(40o + 30o) × (20o + 10o + 0o) 1 0.1 0.06 0.8220
40o × 30o 1 0.10 0.98 0.3782
20o × (10o + 0o) 1 0.05 0.55 0.4999
10o × 0o 1 0.13 1.28 0.3210
Site (Latitude)   4 0.10 0.94 0.4443
           
Plot (Site (Latitude))   135 0.11 0.00 1.0000
           
Category   3 22133.1 377.88 0.0001*
(1 + 2 + 3) × 4 1 48134.5 821.81 0.0001*
1 × (2 + 3) 1 100.94 1.72 0.1900
2 × 3 1 18163.8 310.11 0.0001*
Latitude × Category 12 971.48 16.59 0.0001*
(40 + 30) vs. (20 + 10 + 0) × (1 + 2 + 3) vs. 4 1 913.24 15.59 0.0001*
(40 + 30) vs. (20 + 10 + 0) × 1 vs. (2 + 3) 1 13.51 0.23 0.6313
(40 + 30) vs. (20 + 10 + 0) × 2 vs. 3 1 1517.23 25.90 0.0001*
40 vs.30 × (1 + 2 + 3) vs. 4 1 1071.16 18.29 0.0001*
40 vs.30 × 1 vs. (2 + 3) 1 4380.75 74.79 0.0001*
40 vs. 30 × 2 vs. 3 1 484.38 8.27 0.0042*
20 vs. (10 + 0) × (1 + 2 + 3) vs. 4 1 517.13 8.83 0.0031*
20 vs. (10 + 0) × 1 vs. (2 + 3) 1 88.56 1.51 0.2195
20 vs. (10 + 0) × 2 vs. 3 1 1439.31 24.57 0.0001*
10 vs .0 × (1 + 2 + 3) vs. 4 1 59.13 1.01 0.3156
10 vs. 0 × 1 vs. (2 + 3) 1 1.89 0.03 0.8575
10 vs. 0 × 2 vs. 3 1 598.55 10.22 0.0015
Category × Plot (Site (Latitude)) 417 58.57    
           
Total   575      

   Notes: Main effect was latitude, with split plot effect of site and a split-split plot effect of category. 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 = 0.78. The dependent variable was proportion of species/stratum.


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