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Emily Runnells and Meghan Brown

Herbivorous Crustacean Zooplankton as Indicators of Water Quality in Owasco Lake. Emily Runnells and Meghan Brown. With Thanks To: ~Field and Lab Help: The Brown and Halfman Lab Crews ~Funding: Senator Nozzolio and the State of NY, and Hobart and William Smith.

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Emily Runnells and Meghan Brown

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  1. Herbivorous Crustacean Zooplankton as Indicators of Water Quality in Owasco Lake Emily Runnells and Meghan Brown With Thanks To: ~Field and Lab Help: The Brown and Halfman Lab Crews ~Funding: Senator Nozzolio and the State of NY, and Hobart and William Smith

  2. Relative to other Finger Lakes Large watershed Small volume Poor water quality Chlorophyll Asterionella Owasco Lake www.fingerlakes411.com/listing.asp? • Recently,phytoplankton blooms and macrophyte growth increasingly common • 2007 ~2 μg/L Chl a

  3. Why Monitor with Zooplankton? Sport fish Forage fish Carnivorous Zooplankton Herbivorous Zooplankton Phytoplankton Nutrients

  4. Measures ofProductivity

  5. ? The Questions Asked: • Does zooplankton composition data agree with other data measuring productivity in Owasco Lake? • Does zooplankton composition analysis indicate increased productivity of Owasco Lake? = =

  6. Sampling Chl a Zooplankton Secchi

  7. ΣCalanoid Σ(Cyclopoid + Cladocerans) Gannon Index = Low Productivity High Productivity May June July

  8. Gannon ΣCalanoid Σ (Cyclopoid + Cladocerans) Station 1: Productivity Measures Secchi Depth (m) Chl a (μg/L) May June July

  9. Gannon Station 2: Productivity Measures Secchi Depth (m) Chl a (μg/L) May June July ΣCalanoid Σ (Cyclopoid + Cladocerans)

  10. And so…. • Does zooplankton composition data agree with other data measuring productivity in Owasco Lake? • Yes and No • Sometimes agreement • Not consistently one parameter that is out of line

  11. Does zooplankton composition analysis indicate increased productivity of Owasco Lake? • Yes: May and July • Overall lake has moderate productivity • More Bosmina than Daphnia • More cyclopoid than calanoid

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