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Figure 4-16: Results from nutrient amendment bioassays for selected stations: August 7, 1997. Chlorophyll 

 response indicated by fluorescence. Each daily value represents the mean of four replicate samples. 



Phosphate and trace metals stimulated small 

 chlorophyll responses and were probably not 

 significant. 



Station 63 — No chlorophyll increases were observed 

 with any of the amendment additions (Figure 4- 16b) 



Station 60 — All additions showed an increase in 

 chlorophyll compared to the control except phosphate 

 additions (Figure 4-1 5d). The chlorophyll 

 enhancements were approximately double when 

 compared to the control. 



Amendment Series 3: August 7, 1997 



Station 68 - Additions of ammonium, nitrate, silicate 

 and ammonium plus P showed increased chlorophyll 

 responses compared to the control (Figure 4- 16a). 



Phosphate and trace metals stimulated small 

 chlorophyll responses and were probably not 

 significant. 



Station 63 — No chlorophyll increases were observed 

 with any of the amendment additions (Figure 4-1 6b) 



Station 66 - No chlorophyll increases compared to the 

 control were observed with any of the amendment 

 additions (Figure 4- 16c). 



Station 60 - Only trace metal additions enhanced 

 chlorophyll compared to the control (Figure 4-16d). 

 Other additions produced no significant effects in 

 chlorophyll concentration. 



Chapter hour ♦♦♦ 4-17 



