50 



5J3 



! Z S U 5 D 7 B / 1 J ^ J S 7 S 

 Particle diameters (dir.iensional classes) 



Fig. 9. Relationship of particles of various diameters in soils in 



bottom sections occupied by different biocenoses. Particle diameter, 



mm: 1, >2; 2, 2-1; 3, 1-0.5; 4, 0.5-0.25; 5, 0.25-0.1; 6, 0.1-0.05; 



7, 0.05-0.01; 8, <0.01. Biocenosis A: 1, Macoma calcarea ; 



2, Yoldia hyperborea ; 3, Megayoldia thraciaeformis . 



B, Nuculana pernulaT 1, in Bering Sea; 2, in Gizhiginskiy Bay of the 



Sea of Ohotsk; C: 1, Ophiura sarsi ; 2, £. leptoctenia . D: 



1 , Brisaster latifrons ; 2, Chindota ochotensis ; 3, STernaspis scuta ta ; 

 4 , Axiothella catenata . E : 1 , Venericardia crebricostata ; 



2, Sernpes groenlandicus; 3, Clmocardium ciliatum. 



200 



