Figure 5.2 Spatial variation in dry season NO3 + NCF . The line indicates a 2 nd order polynomial fit to 
the data (NO3 + NO2 = 20.4 - 1.9 * distance + 0.079 * distance 2 , r 2 = 0.1 5 , p < 0.001) 
0 5 10 15 20 25 30 
Distance from Mouth of Estuary, km 
Figure 5.3 Spatial variation in dry season P 0 4 . The line indicates linear regression (PC)/ = 1.55 - 
0.041 * distance, r 2 = 0.24, p < 0.0001). 
36 
