388 



WELCH AND WARD 



200 



150 



Y = 257.72 + (-6.08)25 

 r2= 0.21 

 r = 0.46 



25 30 



TEMPERATURE, °C 



Fig. 4 Carbon fixation as a function of temperature at Station 1. 



120 



100 — 



E 60 — 



194.92 + (-4.97)25 



0.45 



0.67 



20 25 



TEMPERATURE, °C 



Fig. 5 Carbon fixation as a function of temperature at Station 2. 



That temperature stimulates the rate of carbon fixation in Lewis 

 Creek Reservoir is supported by the temperature-effect experiments. 

 On dates when the data showed a significant effect of temperature 

 on the rate of carbon fixation, it was significant to the 99% level, 

 except on Nov. 2, when sampling error was such that the level of 

 significance was only 90%. 



The results of the nutrient experiments could be caused by an 

 insufficient nutrient spike or could be associated with nutrient 



