Table 3. — Mean estimates of -primary productivity {g. C/m.'Iday) in west Florida rivers 



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Figure 7. — River discharge, precipitation, and hydro- 

 logical properties at station 6, Myakka River, Fla., 

 January 1964 to January 1965. (Open bars=surface; 

 solid bars = bottom.) 



DISSOLVED OXYGEN 



Concentrations of dissolved oxygen at the 

 river stations varied from 0.44 to 7.56 ml. per 

 liter. Values were highest at most stations in 



FLORIDA'S WEST COAST TRIBI'TARIES 



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Figure 8. — River discharge, precipitation, and hydro- 

 logical properties at station 7, Peace River, Fla., Jan- 

 uary 1964 to January 1965. (Open bars = surface; soHd 

 bars = bottom.) 



winter and lowest in June and July (figs. 4-8). 

 Oxygen values occasionally reached 100 to 142 

 l)ercent saturation during every season. Most of 

 the high values (stations 1, 2, 7, and 8) coincided 

 with high concentrations of chlorophyll "a." 



469 



