centrations at the Peace RiverStation are not reflected in the concentration 

 in Charlotte Harbor with one exception. However, the values in the Harbor 

 were about twice that for Station h, in the ship channel about three miles 

 offshore. 



The next point to examine is whether outflow from Charlotte Harbor has 

 any effect upon the inshore Gulf water. It will be noted that there is a 

 decreasing amount of phosphorus in the surface layer from Charlotte Harbor to 

 Station 8 (table 1 and figs. 3 to 5). 



The question arises whether this is due to distance from Charlotte 

 Harbor or is simply a gradient which is characteristic of the entire coast. 

 Although many more stations along the coast would be necessary to answer this 

 adequately, a few stations recently established give more information about 

 the areas to the north and south of Charlotte Harbor. 



For a comparison with Station h, a station was established at the mouth 

 of Sarasota Bay, Station 13. This station was occupied twice in January 195l. 

 A comparison of values is shown in table 2. It will be noted that the quanti- 

 ties of phosohorus were very similar at the two stations at this time. This 

 comparison suggests that conditions at Station h are not peculiar to that area. 

 However, the results are inconclusive since the values obtained at Station i; 

 during that month were considerably below the average for that station. 

 Whether more normal values at Station h are associated with higher values at 

 Station 13 is not known. 



Table 2. — Concentration of phosphorus at surface (approximately 1 meter) at 

 inshore stations (^lg-at/L) . 



Station 



number Date Inorganic Organic Total 



Station 5, fourteen miles offshore and Station 6, forty-three miles off- 

 shore would not be expected to show any effect of out flow of water from 

 Charlotte Harbor because of the distances involved. A comparison of concen- 

 trations in other latitudes but at similar distances from land substantiates 

 this. In table 3 mean values for Stations 9 and 10, north of the original 

 line, and for Stations 11 and 12, south of the original line are compared 

 with mean values for Stations 5 and 6 in the original line of stations. It 

 is obvious from this comparison that the values found in the original line 

 of stations are not oeculiar to that latitude. 



