Ecological Archives E088-129-A1

Silke Langenheder and Henrik Ragnarsson. 2007. The role of environmental and spatial factors for the composition of aquatic bacterial communities. Ecology 88:2154–2161.

Appendix A. A table showing the eigenvalues and P values for a canonical correspondence analysis partitioning the variation in bacterial community composition between environmental and spatial factors.

TABLE A1. Results of a canonical correspondence analysis (CCA) partitioning the variation in bacterial community composition of 35 rock pools into different components. Bacterial community composition was obtained from t-RFLP analysis where peaks with an area >0.5 % of the total signal were included in the analysis. [E+S]: total variation explained; [E]: variation explained by environmental variables; [S]: variation explained by spatial variables; [E | S]: pure environmental variation that is not shared by spatial structure; [S | E]: pure spatial variation independently of any environmental factors; [ES]: the spatial structure in BCC that is shared by the environmental data; 1 – [E+S]: unexplained variation.


 
 

HaeIII
(Total inertia: 4.673)

HhaI
(Total inertia: 3.682)


 
 

Variation

Eigenvalues

Variance
explained (%)

P value

Eigenvalues

Variance
explained (%)

P value

                 

[E+S]

1.162

24.9

0.001

0.893

22.8

0.001

[E]

0.683

14.6

0.001

0.616

16.7

0.001

[S]

0.573

12.2

0.001

0.368

10.0

0.001

[E | S]

0.589

12.6

0.001

0.567

15.4

0.001

[S | E]

0.479

10.3

0.005

0.277

7.5

0.001

[ES]

2.0

1.3

1 – [E+S]

75.1

77.2


 
 


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