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- W2044947400 abstract "1. We studied the effects of toxic cyanobacteria, Microcystis aeruginosa , on Daphnia pulex populations. The experiment was performed at room temperature in laboratory microcosms to which we added toxic Microcystis in two pulses. Green alga, Scenedesmus obtusiusculus, was provided in two concentrations. 2. Microcystis exposure resulted in a decreased population density of Daphnia. The proportion of adolescents was higher in the Microcystis treatment than in the control, while the proportion of newborns did not differ significantly from the control. This indicates delayed maturation of Daphnia exposed to Microcystis . We found no significant impacts of cyanobacteria, food level or clonal origin on population variability after correcting for differences in population size. 3. Juveniles of the two clones studied showed different sensitivities to toxic Microcystis in the acute test. However, in the population experiment we did not find clonal differences between Microcystis and control treatments in the relative proportion of juveniles. 4. The number of ephippia produced per adult was highest in the treatments with Microcystis. This indicates that cyanobacterial toxins may be one of several factors inducing ephippia formation, acting directly or through inhibition of feeding." @default.
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- W2044947400 date "1997-06-01" @default.
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- W2044947400 title "Responses of <i>Daphnia pulex</i> populations to toxic cyanobacteria" @default.
- W2044947400 doi "https://doi.org/10.1046/j.1365-2427.1997.00189.x" @default.
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