. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering Organic matter 373 were found to be within the ranges of , 104-156, and ^g/\ in the deep Bering Sea, continental shelf, and northern North Pacific areas respectively (Fig. 23-13). These values indicate that regional variations of particulate amino acids are identical with those of particulate organic carbon and nitrogen. The concentration of particulate amino acids tended to decrease in a steep gradient with depth in the surface and subsurface
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder. Oceanography Bering Organic matter 373 were found to be within the ranges of , 104-156, and ^g/\ in the deep Bering Sea, continental shelf, and northern North Pacific areas respectively (Fig. 23-13). These values indicate that regional variations of particulate amino acids are identical with those of particulate organic carbon and nitrogen. The concentration of particulate amino acids tended to decrease in a steep gradient with depth in the surface and subsurface layers at all stations. No significant vertical gradient was observed in the particulate amino acid of the deep waters at stations 11 and 33, but slightly higher values were found in the intermediate waters at station 33. The ratios of particulate amino acid carbon (PAC) and nitrogen (PAN) to particulate organic carbon (POC) and nitrogen (PON) in the surface and subsur- face layers (0-70 m) were found to have an almost identical range of values throughout the stations. Slightly lower values, however, were obtained at stations 13 and 14. It is assumed that this effect is CONCENTRATION OF AMINO ACI D ( ^J 9 / I ) 50 100 150 5000L Figure 23-13. Vertical profiles of particulate amino acids at various stations in the deep Bering Sea, continental slielf, and northern North Pacific areas. largely due to contamination by terrigenous materials since these stations are in Bristol Bay. PAC/POC and PAN/PON at these stations were found with the ranges of percent and percent respectively. These values do not conflict with the ratios obtained in the high latitude areas (30-50°N) of the North Pacific Ocean, but much lower values were found in tropical and sub- tropical areas of the Pacific Ocean (Handa et al. 1972). Amino acid composition of the particulate matter at stations 11 and 33 is shown in Table 23-3. Serine, glycine, and alanine were found to be the domina
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