Inaccessible resource pool

Figure 8.2 Simple model. This figure depicts the compartment model, which is comprised of plants Pi), which are the primary producers, herbivores (H/), carnivores (Q), human households (HH), and a resource pool and inaccessible resource pool (RP, IRP).

Figure 8.4 The integrated economic—ecological model. This figure depicts the compartment model, which is comprised of piants (P,), which are the primary producers, herbivores (H/), carnivores (C,), human households (HH), and a resource pool and inaccessible resource pool (RP, IRP). The arrows represent the mass flows from one compartment (origination) to another compartment (termination), and all living compartments have an implied flow back to the resource pool that represents death. IS is the industrial sector, whereas EP and ES are the energy producers and the energy source compartment, respectively [14].

HH, Human household RP, resource pool IRP, inaccessible resource pool IS, industrial sector ... 

---