Table 2 Statistical results for correlations (two-sided tests) and linear models

From: Marine viruses disperse bidirectionally along the natural water cycle

Correlation analysis

X

Y

Test

t value

df

p value

corr

Significance

Absolute counts

Prok_SML

VLP_SML

Pearson

2.76

8

0.025

0.7

*

Euk_SML

VLP_SML

Pearson

3.13

8

0.014

0.74

*

Prok_SSW

VLP_SSW

Pearson

1.02

9

0.32

0.33

n.s.

Euk_SSW

VLP_SSW

Pearson

1.18

9

0.27

0.37

n.s.

Euk_SML

Prok_SML

Pearson

5.32

8

7.10E-04

0.88

***

Euk_SSW

Prok_SSW

Pearson

2.95

9

0.016

0.7

*

Enrichment factors (SML/SSW)

EF_Prok

EF_VLP

Spearman

  

5.60E-03

0.83

**

EF_Euk

EF_VLP

Spearman

  

0.06

0.62

n.s.

EF_Euk

EF_Prok

Spearman

  

5.50E-03

0.83

**

Env.variables_vs_absolute_counts

Wind speed

VLP_SML

Pearson

0.36

8

0.73

0.13

n.s.

 

VLP_SSW

Pearson

0.22

8

0.83

0.078

n.s.

 

Prok_SML

Pearson

1.72

8

0.12

0.52

n.s.

 

Prok_SSW

Pearson

1.93

8

0.09

0.56

n.s.

 

Euk_SML

Pearson

1.87

8

0.10

0.55

n.s.

 

Euk_SSW

Pearson

2.38

8

0.044

0.64

*

Salinity

VLP_SML

Pearson

0.26

8

0.8

0.092

n.s.

 

VLP_SSW

Pearson

−1.11

8

0.3

−0.37

n.s.

 

Prok_SML

Pearson

1.84

8

0.1

0.54

n.s.

 

Prok_SSW

Pearson

2.83

8

0.022

0.71

*

 

Euk_SML

Pearson

1.63

8

0.14

0.5

n.s.

 

Euk_SSW

Pearson

2.59

8

0.032

0.68

*

Light

VLP_SML

Pearson

−1.27

8

0.24

−0.41

n.s.

 

VLP_SSW

Pearson

0.24

8

0.82

0.084

n.s.

 

Prok_SML

Pearson

0.03

8

0.98

0.009

n.s.

 

Prok_SSW

Pearson

1.62

8

0.14

0.5

n.s.

 

Euk_SML

Pearson

−0.84

8

0.43

−0.28

n.s.

 

Euk_SSW

Pearson

−0.75

8

0.48

−0.26

n.s.

Env.variables_vs_enrichment

Wind speed

EF_VLP

Spearman

  

0.81

−0.09

n.s.

 

EF_Prok

Spearman

  

0.30

0.36

n.s.

 

EF_Euk

Spearman

  

0.47

0.26

n.s.

Salinity

EF_VLP

Spearman

  

0.47

0.26

n.s.

 

EF_Prok

Spearman

  

0.39

0.31

n.s.

 

EF_Euk

Spearman

  

0.41

0.30

n.s.

Light

EF_VLP

Spearman

  

0.81

−0.09

n.s.

 

EF_Prok

Spearman

  

0.89

−0.05

n.s.

 

EF_Euk

Spearman

  

0.33

−0.35

n.s.

Linear model

X

Y

Adjusted R2

F value

df

p value

AIC

Significance

Wind*Salinity

EF_Euk

0.596

5.43

6

0.038

−2.377

*

  1. AIC Akaike’s Information Criterion, corr correlation coefficient, df degrees of freedom, EF enrichment factor, Euk small phototrophic eukaryotes, Prok prokaryotes, SML surface microlayer, SSW subsurface water (1 m depth), VLP virus-like particles, significance levels: *<0.05, **<0.01, ***<0.001, n.s. not significant. Only linear models with significance in F-test are shown. Tested were all possible combinations of environmental variables (light, wind speed, salinity) on VLP and cell enrichment in the SML.
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