Parameter

1969-1984 (Mean (SD)

1985-2000 (mean (SD)

p value (S = Significant; NS = Not Significant

Copepoda (g(ww)/m²)

12.2 (6.2)

7.3 (4.6)

<0.0001 S

Cladocera (g(ww)/m²)

19.4 (11.6)

15.2 (9.7)

0.0001 S

Rotifera (g(ww)/m²)

2.3 (2.9)

2.0 (3.0)

0.2135 NS

Total Zooplankton

(g(ww)/m²)

33.9 (14.5)

24.5 (12.5)

<0.0001 S

Total Phytoplankton/Total Zooplankton (biomass, w/w)

2.1 (2.1)

4.1 (4.1)

<0.0001 S

Herbivore Copepods

4.5 (2.3)

2.7 (1.7)

<0.0001 S

Predator Copepods

7.7 (3.9)

4.6 (2.9)

<0.0001 S