daphnia - Peter Schultz Zooplankton Global zooplankton...

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Peter Schultz Zooplankton Global zooplankton growth/death rates: > 15mg Carbon per sq. m. /day 5.4 trillion kg Carbon/day 60x the weight of all ppl in world water very muddy Does risk of predation, rather than interference with foraging, determine which zooplankton species are Basic ecology of zooplankton -three major freshwater groups . rotifers . copepods . cladocera . . .studied daphnia - extremely large compared to others -adaptations to reduce predation . small - lakes w/fish have smaller zooplankton than w/o . spiny . fast . nearly transparent . vertical migration - possible b/c of thermal stratification ...in day, deep dark cool waters so fish dont see ...night, feed on algae in upper warm waters since no fish -potential effects of muddy water . binds toxins - easier to take up w/ zooplankton . binds nutrients . blocks light ...reduces photosynthesis in algae ...makes prey harder to see . interferes with foraging on daphnia . when clay added ...slower feeding, reproduction, pop growth
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daphnia - Peter Schultz Zooplankton Global zooplankton...

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