The seasonal biological surveys of 1971 / John C. Ayers, Samuel C. Mozley, John A. Stewart.

In
be made
smaller

cases where comparison of phytoplankton numbers per milliliter could
across the bar, the numbers were in all but two cases significantly
lakeward of the bar:
233 @ DC-4 (3.6~) bar 456 @ DC-3 (6.9~)

174 @ NDC-2-4 (2.9~)
191 @ NDC-4-4 (2.2~)
171 @ NDC-7-5 (3.4~)
268 @ SDC-1-3 (3.70)
219 @ SDC-2-4 (3.2~)
23 @ SDC-4-4 (2.5~)
177 @ SDC-7-5 (3.8~)
Where comparisons of total
cubic meter across the bar could
significantly more zooplankters
6,347 @ DC-4 bar
6,549 @ NDC-1-3
6,850 @ NDC-2-4
3,666 @ NDC-4-4
8,765 @ NDC-7-5
16,710 @ SDC-1-3
8,971 @ SDC-2-4
5,718 @ SDC-4-4
1,915 @ SDC-7-5

91
314
429
600
326
196
180
numbers o
be made,
lakeward
1,568 @
1,282 @
1,830 @
7,259 @
2,618 @
885 @
4,949 @
13,148 @
4,850 @

@ NDC-2-3 (4-7~)
@ NDC-4-3 (4.9~)
@ NDC-7-4 (5.1~)
@ SDC-1-2 (7.3~)
@ SDC-2-3 (5.9~)
@ SDC-4-3 (5.1~)
@ SDC-7-4 (5.6~)
f zooplankton (without nauplii) per
there were in six cases of nine
of the bar:
DC-3
NDC-1-2
NDC-2-3
NDC-4-3
NDC-7-4
SDC-1-2
SDC-2-3
SDC-4-3
SDC-7-4

In waters landward of the thermal bar there were very substantially
larger numbers of copepod nauplii than lakeward of the bar:
DC-2 (landward of the bar) 3,516 nauplii per m3
DC-5 (lakeward of the bar) 401 " " "
DC-6 ( " " " ) 583 " "1
The higher numbers of nauplii are attributed only to the warmer waters
inshore which were permitting the beginning of copepod reproduction which had
not yet begun in the colder waters outside the bar.
Figure 3 presents the numbers of phytoplankters found at the stations of
the survey; in order that the numbers at each station may be gotten onto the
available space of the figure, the population numbers are given as numbers
per 0.01 ml.
In Figure 3, the picture presented by the data is merely one of a dominant tendency for a decrease in numbers as one goes lakeward from the shore.
On the other hand, the zooplankters (Fig. 4) in their horizontal distribution show some accumulation of numbers near the 4~C isotherm. Both phytoplankton and zooplankton show their natural patchiness to some extent in the
horizontal distributions. To try to separate the effects of patchiness of

7