PHYTOPLANKTON MACRO-ALGAE AND SEA GRASSES 



\ ^ I \ 



FILTER FEEDERS AND DETRITUS AND ^ 



*4 GRAZERS 



PLANKTONIC GRAZERS MICROORGANISMS 



PREDATORS 



DEPOSIT FEEDERS 



t 



PREDATORS 



BENTHIC MICROFLORA 



Figure 2. Generalized food web for the coastal zone, showing the relationships of the detritus 

 food chain and the grazing food chains. 



FILTER FEEDERS 



BACTERIA AND 



t 



PHYTOPLANKTON ^ DETRITUS 



HPOZj- ^^ 



(water) 



_ S / ^^GRAS! 



HP0 4~ / __-*► 



■— - macro-algae 



(sediment) 



Figure 3. Generalized compartmental model of the flux of phosphorus through coastal zone 

 ecosystems. 



143 



