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Environmental Sciences Europe

Table 3 Spearman correlation coefficients corrected for the existence of spatial autocorrelation for Cd, Pb and N concentrations in mosses and the corresponding deposition rates for Cd, Pb as well as N (for N: dry, wet and total)

From: Does spatial auto-correlation call for a revision of latest heavy metal and nitrogen deposition maps?

    

Degrees of freedom

p-values

  

n

Spearman

Original

Corrected

Original

Corrected

Cd

Year of sampling

1534

0.66

1532

59

<0.001

<0.001

sum

1534

0.64

1532

58

<0.001

<0.001

Pb

Year of sampling

1523

0.73

1521

23

<0.001

0.008

 

sum

1523

0.73

1521

23

<0.001

0.01

N total wet

Year of sampling

769

0.63

767

13

<0.001

0.029

 

sum

769

0.64

767

13

<0.001

0.029

N total dry

Year of sampling

769

0.59

767

16

<0.001

0.028

 

sum

769

0.59

767

16

<0.001

0.027

N total

Year of sampling

769

0.63

767

13

<0.001

0.026

 

sum

769

0.64

767

13

<0.001

0.026

  1. In each case the correlations were both calculated for the concentration of the elements in the year the sampling was performed as well as for the sum according to the accumulation period of three years.
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