THE BARENTS SEA 



107 



green ones ; and among the red ones Rhodymenia palmata, Odonthalia dentata, 

 Ptilota plumosa, Delesseria sanguined, Phyllophora, Brodiaei and Litho- 

 thamnion. 



Quantitative distribution of phytobenthos. On the littoral, among the species 

 cited, Ascophyllum nodosum, Fucus vesiculosus, F. inflatus, F. serratus and 

 on the upper level of the sublittoral both species of Laminaria are much in 





GREEN 



BROWN 





7 



1-Fucus uesiculosus 

 2-Ascophyllum nodo- 

 sum 3-F-serratus 

 4-F inflatus 5- Chor- 

 da filum 6-Lami- 

 naria 7-Pylaiella 

 8-£)lctyosiphon 9- 

 Mon astro ma fuscun 

 10-11 Enteromorpha 

 и С I adophora graci- 

 lis 12-Cladopho- 

 ra fracta 



It 



Fig. 41. Quantitative vertical distribution of main 

 forms of phytobenthos on rock and stone soils 

 off the western Murman coast, g/m 3 (Zenkevitch). 

 (The vertical series of numerals denotes metres 

 from zero depth.) 



evidence. Moreover, it is remarkable that the mean biomass indices of all 

 these forms are very stable not only for different regions of the western 

 Murman coast, but also for a much wider area (Table 40 and Fig. 41). 



In the Ascophyllum bed (Fig. 42) a biomass of as much as 28 kg/m 2 has 

 been observed, while fuci do not produce more than 12 kg/m 2 . According to 

 the estimates of the above-mentioned workers, 39 tons of wet algae can be 

 obtained from a portion of a craggy or rocky littoral of 1 to 1 5 m wide and 1km 

 in length, while from the whole Murman coast more than 500,000 tons can be 

 obtained. 



