Planktonic Parameter

1969-1980

1981-1990

1991-2001

% Change, D = Decline, E = Enhancement

Total Phytoplankton

60.6

81.6

87.1

44 E

Peridinium

49.8

55.4

50.3

1 E

Chlorophyta

6.2

13.4

15.5

150 E

Diatoms

2.4

9.7

14.6

508 E

Cyanobacteria

2.2

3.1

6.7

205 E

Total Zooplankton

32.3

21.4

25.2

22 D

Rotifera

2.4

1.6

1.9

21 D

Cladocera

18.2

13

16

12 D

Copepoda

11.7

6.8

7.3

38 D