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 |