Ecological Archives M073-001-A2

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

Appendix B. Split-plot ANOVA of the effetcs of latitude and category on species composition measured as the number of species per category per 0.06251/16 ha.

Source   df Mean Square F P

Latitude

  4 4522.63 8.77 0.0293*
(40o + 30o) × (20o + 10o + 0o) 1 10671.9 20.70 0.0104*
40o × 30o 1 119.63 0.23 0.6651
20o × (10o + 0o) 1 3068.04 5.95 0.0712
10o × 0o 1 1675.01 3.25

0.1458

Site (Latitude)

  4

515.44

17.24 0.0001*
           

Plot (Site (Latitude))

  135 29.90 2.21 0.0001*
           
Category   3 5893.08 435.15 0.0001*

(1 + 2 + 3) × 4

1 10915.9

806.03

0.0001*
1 × (2 + 3) 1 88.33 6.52 0.0110*
2 × 3 1 6675.00 492.88 0.0001*
Latitude × Category 12 613.66 45.31 0.0001*

(40 + 30) vs. (20 + 10 + 0) × (1 + 2 + 3) vs.4

1 811.51 59.92 0.0001*
(40 + 30) vs. (20 + 10 + 0) × 1 vs. (2 + 3) 1 0.61 0.04 0.8323
(40 + 30) vs. (20 + 10 + 0) × 2 vs. 3 1

1925.65

142.19 0.0001*
40 vs. 30 × (1 + 2 + 3) vs. 4 1 19.06 1.41 0.2361
40 vs. 30 × 1 vs. (2 + 3) 1 374.07 27.62 0.0001*
40 vs. 30 × 2 vs. 3 1 82.88 6.12 0.0138*

20 vs. (10 + 0) × (1 + 2 + 3) vs.4

1 1213.4 89.60 0.0001*
20 vs. (10 + 0) × 1 vs. (2 + 3) 1 15.43 1.14 0.2864
20 vs. (10 + 0) × 2 vs. 3 1 1522.94 112.45 0.0001*
10 vs. 0 × (1 + 2 + 3) vs. 4 1 55.59 4.40 0.0365
10 vs. 0 × 1 vs. (2 + 3) 1 0.03 0.00 0.9635
10 vs. 0 × 2 vs. 3 1 513.52 37.92 0.0001*
Category × Plot (Site (Latitude)) 417 13.54    
           
Total   575      

   Notes: Main effect the number of species per stratum per 1/16 ha. Main was latitude, with a 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 = 0.90. The dependent variable was number of species/stratum.


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