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Table 7 PERMANOVA comparison of randomly generated cover data sets (i) before and (ii) after the SACFOR encoding and numeric conversion. Both before and after data sets are transformed (log2) 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 cover conversion

1

0.832 (± 0.000)

0.832 (± 0.000)

1.874 (± 0.000)

0.004 (± 0.000)

0.001 (± 0.000)

Residuals

474

210.493 (± 0.000)

0.444 (± 0.000)

 

0.996 (± 0.000)

 

Total

475

211.271 (± 0.000)

  

1.000 (± 0.000)

 

Rank values

Df

Sequential sums of squares

Mean squares

F statistic

Partial R-squared

p value

Factor: before/after cover conversion

1

0.050 (± 0.003)

0.050 (± 0.003)

0.112 (± 0.007)

0.000 (± 0.000)

0.001 (± 0.000)

Residuals

474

212.591 (± 0.388)

0.449 (± 0.001)

 

1.000 (± 0.000)

 

Total

475

212.41 (± 0.381)

  

1.000

 
  1. Df degrees of freedom