Biomass , g dry wt rri 2 
1,000.0 
100.0 - 
10.0 - 
i.o - 
o.i 
□ Lower 
Herbivore 
Surface SubSurface Fitter Feeder 
Deposit Feeder Deposit Feeder 
Trophic Groups 
Facultative 
Fitter/Deposit 
Feeder 
Carnivore 
Figure A.4 Mean biomass distribution among trophic guilds in the lower, mid, and upper reaches of 
Yaquina Estuary. The error bars indicate minimum and maximum observed biomass values. 
127 
n 
