bacterial and protozoan populations are especially strong in upper station data (Fig. 3).
Summer data show out-of-phase cycles with a period of about 8-10 days. Although a
similar period is evident in the winter data, the cycles appear to be almost in phase.
Examining the lower station, we see once again that summer data show more evidence for
periodicity than do the winter data, but in both cases the amplitude is smaller than in
upper station data for the corresponding season.
3 Point Moving Average
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Figure 3 : Three-point moving average plot of bacterial and protozoan biomass for the Duplin River stations.
Data have been smoothed using a three-point moving average technique (Arkin and Colton, 1970).
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