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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 4846

Vassil G. Golemansky; On Some Ecological Preferences of Marine Interstitial Testate Amoebas. Arch.Protistenk 144:424-432, 1994

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The impact of three ecological factors -granulometry of the sand, water salinity and water dissolved oxygen- on the marine interstitial testate amoebas from the Black Sea coast was studied. It was found that the homogeneous little grain sands [Modality (Mo)=0.10-0.80 mm] were richer in interstitial testate amoebas than the heterogeneous and big grain ones (Mo>0.80 mm). The interstitial testate amoebas were mixo-, oligo- and mesohaline and only 4 species survived in water with a salinity from 30 0/00 to 40 0/00. The quantity of water dissolved oxygen in the studied stations varied from 4.8 to 0.5 mg/l. But the distribution of the interstitial testate amoebas was not found to be a direct function of the quantity of oxygen. Most of the psammobionts inhabit a zone where the dissolved oxygen varies from 2 to 4 mg/l. The importance of the ecological factors on the species composition and the horizontal distribution of the interstitial testacean taxocenosis on the Black Sea coast is discussed.