Bacteria and phytoplankton of the seasonal surveys of 1972 and 1973 / John C. Ayers.

INTRODUCTION

In Part VII (March 1971) of our report series relative to the Donald
C. Cook Nuclear Station, we established the following report format:
A. COOK PLANT PREOPERATIONAL STUDIES
A.1 Recording of Local Water Temperatures
A.2 Study of Floating Algae and Bacteria
A.3 Development of a Monitor for Phytoplankton (ABANDONED)
A.4 Study of Attached Algae
A.5 Study of Zooplankton
A.6 Study of Aquatic Macrophytes
A.7 Study of Benthic Organisms
A.8 Study of the Local Fishes
A.9 Support of Aerial Scanning
A.10 Study of Entrainment and Impingement
B. SURVEYS OF EXISTING WARM WATER PLUMES
C. THE ICE BARRIER AT THE COOK PLANT SITE
D. EFFECTS OF EXISTING THERMAL DISCHARGES ON LOCAL ICE BARRIERS
E. EFFECTS OF RADIOACTIVE WASTES IN THE AQUATIC ENVIRONMENT
E.1 Gamma Scan of Bottom Sediments (FINISHED)
E.2 The Most Sensitive Organism for Concentration of
Radwastes (FINISHED)
E.3 Study of Lake Michigan's Present Radioactivity Content
(FINISHED)
This report covers only item A.2 of the above format; the zooplankton
of the major seasonal surveys of 1972 are reported in Part XIII of our
report series (see p.iii); zooplankton of the 1973 major surveys has been
reported in Seibel and Ayers (1974); benthos of both 1972 and 1973 major
surveys is also reported in the latter report. This report covers the
bacteria and phytoplankton results of the major surveys of 1972 and 1973.
The April survey of 1972 was carried out on an older 54-station
sampling grid; the surveys of July and October were on a reduced grid of
36 stations (Table 1). Station DC-1 directly in front of the plant could
not be occupied in October 1972 or during any of the surveys of 1973
because of construction activities at the station position. Figures 1 and
2 show the station positions of the two sampling grids. At all stations

1