Table 4-1 



Ecologically Important Dissolved Oxygen Ranges as 

 Determined from Permanently Stratified Low-Oxygen Marine 

 Basins (from Rhoads and Morse, 1971) 



Dissolved Oxygen Range (mg/2) Facies 



> 3.0 Aerobic 



3.0 to 0.41 Hypoxic* 



0.4 to 0.14 Dysaerobic 



< 0.14 Anaerobic 



The hypoxic facies has been added to the Rhoads 

 and Morse (1971) basin model by Dr. Barbara Welsh, 

 University of Connecticut, to include responses of 

 high metabolic rate demersal or benthic megafauna. 



