TN (ppm)

Periodical mean WL (mbsl)

Mean concentration (ppm)

Relative scale

Significance (p)

2 (−209.77)

0.568

3 (−210.39)

0.582

4 < 3

<0.0001 S

4 (−211.84)

0.439

4 < 2

p = 0.0005 S

TP (ppm)

2 (−209.77)

0.013

3 (−210.39)

0.017

2 < 3

<0.0001 S

4 (−211.84)

0.017

2 < 4

<0.0001 S

TIN (ppm)

2 (−209.77)

0.160

3 (−210.39)

0.150

4 < 2

p = 0.0294 S

4 (−211.84)

0/115

4 < 3

p = 0.0220 S

TDN (ppm)

2 (−209.77)

0.368

3 (−210.39)

0.431

4 (−211.84)

0.321

4 < 3

<0.0001 S

TDP

2 (−209.77)

No data

3 (−210.39)

0.008

4 (−211.84)

0.006

4 < 6

<0.0001 S