Table 2. Primary productivity estimates for Hillsborough County natural sys- 

 tems 



.Hillsborough County Environmental Protection Commission 1979. 

 Lieth and Whittaker 1975. 



Similarly, the research would continue through the entire energetics diagram, 

 translating each storage into its appropriate mathematical analog. Each term 

 in the differential equation represents a specific energy flow in the model . 

 The initial value of the energy flows and storages are used to calculate the 

 pathway coefficients in the equation. For example, the flow of energy on 

 pathway k.N is 7 x 10^2 cal /yr (from Figure 7) thus: 



7 X 10^^ = k^N 

 .*. k^ = 5.83 X 10^ 



318 



