Appendix 6.3(26). Generalized aquatic food web. Major sources of food 

 originating within the water are phytoplankton (1) and benthic plants 

 (2) . This is supplemented by organic detritus input from adjacent habi- 

 tats (3). Most of this organic production enters the aquatic detrital 

 system (4) . The lettered hexagonal symbols represent consumers differen- 

 tiated by the items they feed on (as indicated by arrows). Listed are 

 consumer species represented by each lettered hexagonal symbol (Darnell 

 1961, Day et al. 1973, Bahr and Hebrard 1976, Loesch 1976). 



Phytoplankton 

 1 



3 Emergent 

 Producers 

 (Outside of 

 Habitat) 



2 Benthic 

 Flora 

 (Vascular Plants 

 and Algae 



^^ ORGANIC 



DETRITUS-BACTERIA 

 COMPLEX 





continued 

 190 



