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Table 3. Analysis of variance of species richness (S) in pitfall traps for the effects of disturbance class, site, and year.
Source of Variation
DF
MS
F
Among subjects      
Disturbance 2 115.1 18.2 ***
Site (Disturbance) 6 17.7 2.8 *
Sample (Site (Disturbance)) 27 6.3  
Within subjects      
Year 2 12.3 2.5 ns
Year x Disturbance 4 0.56 0.12 ns
Year × Site (Disturbance) 12 9.63 1.98 *
Sample (Year × Site (Disturbance)) 54 4.87  
Note: Repeated measures are on year. For the within-subject tests, the significance of F was determined for adjusted degrees of freedom, which equal the df multiplied by Huynh-Feldt epsilon, (0.73533).

* P < 0.05; ** P < 0.01; *** P < 0.001; ns, not significant.
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