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Table 1 Summary of two-way ANOVAs of the effect of substratum orientation and succession length or starting season on species richness and the Shannon diversity index

From: Succession in subtidal macrofouling assemblages of a Patagonian harbour (Argentina, SW Atlantic)

Source df MS F P
Succession analysed at quarterly intervals
Species richnessa
 Surface orientation 1 0.1994 22.0 <0.0001
 Succession length 3 0.0219 2.4 0.09
 Surface orientation × succession length 3 0.0152 1.7 0.20
 Error 24 0.0091   
Shannon index
 Surface orientation 1 1.1256 12.2 <0.01
 Succession length 3 0.2117 2.3 0.10
 Surface orientation × succession length 3 0.3484 3.8 0.02
 Error 24 0.0920   
1-year-old assemblages starting at different seasons
Species richnessa
 Surface orientation 1 0.3360 34.4 <0.0001
 Starting season 3 0.0026 0.3 0.85
 Surface orientation × starting season 3 0.0192 2.0 0.15
 Error 24 0.0098   
Shannon index
 Surface orientation 1 3.7725 58.2 <0.0001
 Starting season 3 0.0612 0.9 0.44
 Surface orientation × starting season 3 0.0486 0.7 0.53
 Error 24 0.0648   
  1. Significant results in bold
  2. df Degrees of freedom, MS mean square, F F ratio, P probability values associated with F values
  3. aLog-transformed data