766 



BIOLOGY OF THE SEAS OF THE U.S.S.R. 



Unlike the brown sea-weeds, the red sea-weeds on the Soviet shores of the 

 Sea of Japan belong mostly to the boreal flora. Only Polysiphonia arctica 

 might be included among the Arctic forms. The comparative role of the red 

 sea-weeds in the Pacific Ocean is much greater than in the Atlantic. 



Two of Shchapova's (1957) diagrams (Figs. 379 and 380) may be used for a 



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Fig. 379. Distribution of macrophytes along littoral of De Castri Inlet. Alluvial 

 deposit in depth of bight ; 1 Gloiopeltis capillaris ; 2 Enteromorpha spp. ; 3 Fucus 

 evanescens, Pelvetia wrightii f. babingtonii; 5 Tichocarpus crinitus; 6 Corallina 

 officinalis ; 7 Cystoseira crassipes ; 8 Zostera marina ; 9 Biomass distribution curve ; 

 //, /// Littoral horizons (Vayan). Summer zero of depth is marked by a broken line ; 

 biomass in g/m 2 (Shchapova, 1957). 



comparison of the littoral macroflora of the northern (north of Peter the 

 Great Bay) and the southern regions. 



The composition of the littoral macrophytes of the northern part of the 

 western shore of Sakhalin is very similar to that of the northern mainland 

 coast of the Primor'e ; that of the southern part, warmed by the warm cur- 

 rent, is similar to the southern and central Primor'e. 



Vast fields of the commercial marine grass Phyllospadix occur at 0-5 to 

 15 m depth in some areas of the southern Primor'e (E. Kardakova, 1957); its 

 mean biomass is 2 to 5 kg/m 2 wet weight (0-4 to 1-0 mg/m 2 dry weight). 



There is a great difference between the northern and southern parts of the 

 Primor'e, principally in temperature. Maximum temperatures of the two 

 parts differ by no less than 10° in certain months ; the tides and their char- 

 acter vary a great deal too. 



