column,dataset,description tank,"zooplankton, phytoplankton",mesocosm number (20 cattle tanks numbered 1-43 with many numbers skipped) treatment,"zooplankton, phytoplankton",trophic treatment. 'no zooplankton' = no zooplankton or Neoplea added; 'zooplankton' = zooplankton but not Neoplea added; '40 pleids' = zooplankton and 40 pleids added; '80 pleids' = zooplankton and 80 pleids added taxon,"zooplankton, phytoplankton",morphospecies date,"zooplankton, phytoplankton",sampling date mass,zooplankton,dry zooplankton mass in micrograms/L log.mass,zooplankton,ln(mass + 0.001) bv,phytoplankton,phytoplankton biovolume in cubic microns/microliter zoop,"zooplankton, phytoplankton","y' = zooplankton added, 'n' = zooplankton not added" Neo,"zooplankton, phytoplankton",number of Neoplea added to mesocosm