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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 2287

Wilfried Schonborn; Production Studies on Protozoa. Oecologia (Berlin) 27:171-184, 1977

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In the river Saale and in the terrestrial moss Mnium cuspidatum Leyss. in 1974/1975 the annual production of Testacea and loricate ciliated protozoa were investigated. The production was estimated in the Saale-Aufwuchs on a beta-meso...oligosaprobic (Kaulsdorf, Thuringia, GDR) and on a alpha-mesosaprobic (Rothenstein, Thuringia, GDR) area of the river. The mosses were investigated in a forest near Jena. The production was estimated on slides and in special "production-chambers"; the time of exposure was 2 weeks. Investigations concerned annual production of individuals and biomass, the ratio of annual production/standing crop (P/B), numbers of generations per year (G) and mortality (M%/day). In the mosses, the rainfall modified the production and dislocation of the protozoa. The values for production are: Aufwuchs Saale (beta-meso...oligosaprobic): 24x10E6 i/m2 a (=1.0 g/m2 a =79x10E3 i/m2 day); P/B:12.6. Aufwuchs Saale (alpha-mesosaprobic): 3.2x10E6 i/m2 a (=0.35 g/m2 a =81x10E3 i/m2 day); P/B:34.9; G:22; M:5%/day. Moss:145x10E6 i/m2 a (=0.11 g/m2 a =40.6x10E3 i/m2 day); P/B:8.1; G:16.5; M:3.0%/day.