Ref ID : 2364
Vera Opravilova; A contribution to the knowledge of Testacea (Protozoa: Rhizopoda) of the Jihlava River Near Hrubsice. SCRIPTA FAC.SCI.NAT.UNIV.PURK.BRUN. 13(1):23-32, 1983
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In 5 microhabitats of the Jihlava river near Hrubsice dominance, abundance constant, and mean biomass were investigated in several common species of Testacea. The highest dominance was found in the species Pseudodifflugia fulva and P. gracilis in all microhabitats with the exception of the sediment near the bank in pools. The highest values of biomass were reached by the species Chlamydophrys stercorea in riffles and Centropyxis aculeata in pools. From the families the highest values of biomass were reached by the families Difflugiidae and Centropyxidae. Diversity index in riffles was conspicuously lower than in the microhabitats in pools. In pools the highest diversity index was found in the sediment near the bank. Also the mean biomass was lower in riffles than in pools, the highest biomass in pools was in the sapropel on macrophyta. Activity index was lowest in epilitic periphyta in riffles, highest in the sediment near the bank in pools. From the comparison of values of the dominance of species as well as the whole families at the stations under investigation as well as the values of the diversity index it follows that the basic factor conditioning the occurrence of Testacea in running waters is the character of the substrate.