-up 



life! 



Figure 56. Displocement vol- 

 umes of total plankton (adjusted 

 to 60-meter vertical hauls ex- 

 pressed in cubic centimeters). 



While there was considerable variation in volume, no area 

 was barren; the Chukchi Sea showed a good population with 

 some flares of diatoms. The correlation of plankton concen- 

 tration (fig. 56) with transparency (fig. 54) is generally not 

 good, but it can be seen that relatively large plankton con- 

 centrations occurred off Norton Sound where transparency 

 was low and that, at station Nl 1 where the lowest transparency 

 occurred, the greatest concentration of plankton (mainly 

 diatoms) was found. In the Chukchi Sea, this correlation 

 is poor. 



The only two stations occupied for plankton in Kotzebue 

 Sound showed a small to moderate plankton concentration, 

 hence the low transparency there may be due to suspended 

 sediment. No plankton samples are available from Norton 

 Sound. In the narrows of Bering Strait the low transparency 

 would appear to result from causes other than plankton. At 

 station N28 more detritus than usual was included with the 

 plankton. 



