Cook Plant preoperational studies 1970 / John C. Ayers ... [et al.].

TABLE 7. Summary of Cook Plant planktonic algae to date.

Month & year Organisms No. of species Cells per liter
SPRING
April 1970 Diatoms 10 987,000
Green algae 2 65,000
Flagellates 5 364,000
Blue-greens 1 9,000
May 1970 Diatoms 21 3,120,000
Green algae 9 250,000
Flagellates 5 544,000
Blue-greens 2 30,000
SUMMER
June 1970 Diatoms 18 757,000
Green algae 2 20,000
Flagellates 5 135,000
Blue-greens 2 14,000
August 1969 Diatoms 11 483,000
Green algae 26 274,000
Flagellates 4 122,000
Blue-greens 3 25,000
FALL
October 1969 Diatoms 10 1,711,000
Green algae 11 126,000
Flagellates 3 235,000
Blue-greens 4 29,000

whether (over time) interpretable statistical parameters change, and hence
indicate change in water quality.
The Cook Plant preoperational surveys produce 52 phytoplankton analyses
three times a year. Each set is distributed over the logarithmically-arranged
sampling station grid described and illustrated in pages 66-69 of Part IV of
our report series. These sets of samples are the largest that can be worked
up; it is believed that they represent sufficiently large samplings to justify
statistical treatment.

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