chlorophyll a (Summer average, June - August)

              West Okoboji Lake

             East Okoboji Lake

Year

 

 

Principal

Investigator  

   

 

Sampling

Period

 

 

 

Number

of

lake sampling

sites

 

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

 

Year

 

 

Principal

Investigator

   

 

Sampling

Period

 

Number

of

lake sampling

sites

 

Total

number

of

samples

collected

Avg

chl a

 

(mg/m3)

SE

1971

Bachmann

6/28 to

8/19

6

31

5.0

0.3

1971

Bachmann

7/8 to

8/20

5

49

190.4

17.6

1972

Bachmann

6/12 to

8/26

6

48

3.9

0.3

1972

Bachmann

6/1 to

8/24

5

59

124.8

15.1

1973

Bachmann

6/3 to

8/25

6

58

3.4

0.2

1973

Bachmann

6/6 to

8/25

5

51

67.8

11.1

1979

Bachmann

Jun to

Oct

1

14

6.3

1.0

1979

Bachmann

Jun to

Oct

1

9

25.8

8.3

1987

Bachmann

6/2 to

8/13

6

66

3.5

0.2

NA

NA

NA

NA

NA

NA

1988

Bachmann

6/6 to

8/8

6

57

3.8

0.2

NA

NA

NA

NA

NA

NA

1989

Bachmann

6/4 to

8/6

6

60

3.2

0.2

NA

NA

NA

NA

NA

NA

1990

Bachmann

5/27 to

7/29

1

9

9.9

4.1

1990

Bachmann

5/27 to

7/29

1

9

35.7

9.4

1993

Lang

6/5 to

8/20

3

18

6.8

1.2

NA

NA

NA

NA

NA

NA

1994

Lang

6/26 to

8/30

3

18

6.9

0.6

NA

NA

NA

NA

NA

NA

1995

Lang

6/4 to

8/6

3

15

3.4

0.7

NA

NA

NA

NA

NA

NA

1997

Lang

6/21 to

8/3

3

12

2.1

0.2

NA

NA

NA

NA

NA

NA

1998

Lang

7/2 to

8/28

3

27

4.8

0.7

NA

NA

NA

NA

NA

NA

1999

CLAMP

6/17 to

8/25

6

33

5.0

0.3

1999

CLAMP

6/17 to

8/31

5

30

66.3

12.0

2000

CLAMP

6/7 to

8/31

6

42

4.1

0.2

2000

CLAMP

6/2 to

8/20

5

35

64.0

9.7

2001

CLAMP

6/14 to

8/22

6

36

6.3

0.5

2001

CLAMP

6/10 to

8/22

5

30

52.9

7.5

2002

CLAMP

6/5 to

8/26

6

36

3.8

0.4

2002

CLAMP

6/5 to

8/28

5

35

37.6

3.8

2003

CLAMP

6/11 to

8/20

6

36

3.3

0.3

2003

CLAMP

6/19 to

8/21

5

25

47.5