. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. 318 BIOLOGY OF THE SEAS OF THE Syndesmya alba are poorly represented here. Among the worms the following may be noted: Nephthys ciliata, Scoloplos armiger, Nereis diversicolor, Pygos- pio elegans, Terebellides stromi, Harmothoe sarsi, Halicryptus spinulosus; among the crustaceans: Diastylis rathkei, Pontoporeia femorata, Bathyporeia pilosa and, in altogether negligible numbers, Mesidothea entomon. The last named, like Pontoporeia affinis, has its western limit of distribution east of Meckl
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. 318 BIOLOGY OF THE SEAS OF THE Syndesmya alba are poorly represented here. Among the worms the following may be noted: Nephthys ciliata, Scoloplos armiger, Nereis diversicolor, Pygos- pio elegans, Terebellides stromi, Harmothoe sarsi, Halicryptus spinulosus; among the crustaceans: Diastylis rathkei, Pontoporeia femorata, Bathyporeia pilosa and, in altogether negligible numbers, Mesidothea entomon. The last named, like Pontoporeia affinis, has its western limit of distribution east of Mecklenburg Bay, becoming a mass form to the east and north. On the other. Fig. 152. Distribution of Macoma biocoenosis in southern Baltic Sea (Demel and others, 1954). hand such forms as Mya, Cardium and Mytilus gradually disappear as one moves eastward. K. Demel and his collaborators W. Mankowski and Z. Mulicki (1951, 1954) as a result of comprehensive investigations over a number of years/were able to draw a very interesting picture of the qualitative and quantitative dis- tribution of the bottom fauna of the southern part of the Baltic Sea (south of 56° 45'). Demel reports that the Macoma baltica biocoenosis covers the whole of the shallow zone of the southern part of the Baltic Sea (Fig. 152). In deeper places Macoma baltica gradually disappears and is replaced by the biocoenosis of worms (Scoloplos armiger, Halicryptus spinulosus, Priapulus caudatus) and crustaceans (Pontoporeia femorata and Diastylis rathkei) (Fig. 153). Demel thinks that the propagation of Macoma baltica into the depths is limited by the lack of oxygen. In the greatest depths of the Gotland depression colonies of Scoloplos armiger alone have been discovered. The region inhabited by. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zenkevi
Size: 1905px × 1312px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
