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Table 1 Spearman (ρ) Correlation indexes (or Pearson when indicated “r”), between the soil pH CaCl2, Ca and Mg with analyzed parameters and the relative abundance of archaeal and bacterial phyla (only significant values are shown: r or ρ >0.4 or <-0.4 and P<0.05)

From: Direct and indirect effects of a pH gradient bring insights into the mechanisms driving prokaryotic community structures

Variable

pH (CaCl2)

Ca

Mg

Soil Chemistry

 pH (H2O)

0.98a

0.94

0.72

 Ca

0.95

1.00

 

 Mg

0.72

0.65

1.00

 Al

-0.98

-0.94

-0.70

 Fe

-0.51

-0.44

 

 Mn

-0.51

-0.53

-0.41

 Cu

-0.45 (r)

-0.51 (r)

 

 B

-0.54 (r)

-0.44

-0.46

 P

  

0.48

 CEC

0.52 (r)

0.69 (r)

0.56 (r)

  Soy Yield

0.49

0.45

 

  Simpson diversity index

0.73

0.60

0.59

  Archaeal Phyla

   

 Euryarchaeota

0.41

0.44

 

 Woesearchaeota

0.59 (r)

0.51 (r)

 

  Bacterial Phyla

   

 Bacteroidetes

0.69 (r)

0.54

0.48

 OP3

0.52 (r)

0.46 (r)

0.52

 SR1

0.45 (r)

  

 Gemmatimonadetes

0.49 (r)

0.41

 

 Hydrogenedentes

0.74

0.76 (r)

0.64

 Latescibacteria

0.53

0.49

 

 Lentisphaerae

0.44

0.45

 

 Microgenomates

0.76 (r)

0.70 (r)

0.58

 Nitrospirae

0.55

0.51

0.55

 Omnitrophica

0.58 (r)

0.49 (r)

0.49

 Parcubacteria

0.43 (r)

0.47 (r)

 

 Planctomycetes

0.65 (r)

0.66 (r)

0.48

 Proteobacteria

0.40 (r)

0.45 (r)

 

 Verrucomicrobia

-0.61

-0.61

 

 WCHB1.60

 

-0.42

 

 WD272

-0.83 (r)

-0.73

-0.64

 Unclassified Bacteria

-0.44

-0.47

 
  1. aWe reported Spearman (p) correlations since it fitted better for most of the data and Pearson (r) in the cases it fitted better (full data is available in Additional file 3)