Average variational range of parameters

1987-1991

1994

1997-2004

T (˚C)

−0.63

0.58

0.67

Chl-a (mg/m³)

0.32

0.63

1.14

Cells density (×10⁷ ind/m³)

−4.41

−5.98

Species

8

−47

−51

Total inorganic nitrogen (μmol/L)

0.6

0.34

3.01

SiO₃-Si (μmol/L)

−18.84

−26.05

−21.09

PO₄-P (μmol/L)

−0.762

−0.86

−0.99

Molar TIN/P

4.57

5.92

36.75

Molar Si/P

22.44

17.15

119.76