Table 5. Comparison of particle characteristics between BNL, 

 clear and surface water, as in Table 4. 



Both 



16-19 



Surface 1.08 



2.09 



610 



lu g/L 2 u mole Pr-N/L ^ppb 



Table 6. Comparisons of indicators between BNL, clear and 

 surface water, as in Table 4. 



Although the BNL is enhanced in total protein, measurements 

 of biologically available protein, i.e., that readily degraded by 

 proteases, show that a much smaller fraction of the total protein 

 may be utilized by organisms in the BNL than in the surface layer 

 (Table 7). The remaining "protein" may be tied up in humic 

 material or an artifact of using the Lowry method in the 

 presence of humic materials. 



198 



