other 

 Consumers 



Nutrient 

 Regeneration 



-Nl — >- Pollution 



1 



(Modified from Day et al. 1973) 



Migration 



Figure 2. Master Model AE 4000: estuarine intertidal system— emergent wetland (salinity modifier) 



General increase in organic carbon flow 



^^ Prlmory 

 Rica 1 Consumers 

 rot 



I IrxKIl I 



Snalh 



s.t4 



Bird* 



Figure 3. Submodel AE41: estuarine intertidal emergent wetland-marsh. 



23 



