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Table 2 Analysis of variance for the dry mass of encrusting organisms at the five studied sites (S) and four groups of organisms (O)

From: Community structure of rhodolith-forming beds on the central Brazilian continental shelf

Treatments df Ms F Significance
Sites 4 2.05 × 10−7 5.2 0.002
Groups 3 1.14 × 10−8 29.2 <0.001
S × G 9 4.2 × 10−6 1.1 0.384
Error 184 3.9 × 10−6