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Table 5 PERMANOVA comparison of randomly generated count data sets (i) before and (ii) after the SACFOR encoding and numeric conversion. Both before and after data sets are transformed (log10) before analysis and converted to: (i) relative abundances; and (ii) rank of abundances. Values are based on 10 iterations of the simulation. Number of permutations: 999

From: Converting SACFOR data for statistical analysis: validation, demonstration and further possibilities

Logged values

Df

Sequential sums of squares

Mean squares

F statistic

Partial R-squared

p value

Factor: before/after counts conversion

1

2.448 (± 0.149)

2.448 (± 0.149)

54.669 (± 6.166)

0.103 (± 0.010)

0.001 (± 0.000)

Residuals

474

21.355 (± 1.495)

0.045 (± 0.003)

 

0.897 (± 0.010)

 

Total

475

23.803 (± 1.429)

  

1.000

 

Rank values

 Factor: before/after counts conversion

1

2.314 (± 0.052)

2.314 (± 0.052)

47.050 (± 3.826)

0.090 (± 0.007)

0.001 (± 0.000)

 Residuals

474

23.432 (± 1.608)

0.049 (± 0.003)

 

0.910 (± 0.007)

 

 Total

475

25.746 (± 1.568)

  

1.000

 
  1. Df degrees of freedom