Composition and Distribution of Macrobenthic Invertebrate Fauna 



209 



range classes between 8 and 15.9°C. Mean biomass ranged 

 from 0.03 to 0.04 g/irr (Tables 21, 22; Fig. 235). Fre- 

 quency of occurrence was in the <1 to 1% range in the 

 three range classes (Table 25). 



Relation to Sediment Organic Carbon 



Distribution of hemichordates was limited to the three 

 organic carbon content classes between 0.01 and 1.49%. 

 Mean densities were between 0.1 and 0.2 individual/m 2 



