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Oneida Lake By: Don Maryanski

Explore the formation of Oneida Lake, its physical properties, increasing population impact, temperature profile, phytoplankton, macrophytes, zooplankton, benthic invertebrates, and effects of exotic species on its ecosystem.

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Oneida Lake By: Don Maryanski

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  1. Oneida LakeBy: Don Maryanski

  2. How was Oneida Formed? • Formed from Lake Iroquois • Glaciers receded and damned St. Lawrence • As temp. increased St. Lawrence was able to flow out into ocean and Oneida formed in glacial depression

  3. Physical properties • It is the largest lake by surface area (207 km2) completely bordered by N.Y. • Mean depth is 6.8m • Max depth 16.8m • 20.9 miles long and 5.8 miles wide

  4. More on Oneida • Dimictic and eutrophic • Isothermal in summer • Increasing population causing increased sediment and nutrient imput • Population near lake in 1900 was 413,000, today it is over 886,000 • Exotic species causing changes in food web (zebra mussel) • 8 exotic species in 1900, 18 today

  5. Temperature profile

  6. Phytoplankton • Epilimnion • Aulacosira • Microcystis • Small flagellates • Metalimnion • Aulacosira • Microcystis • Mallanomous • Small flagellates • Hypolimnion • Aulacosira • Microcystis • acinastrum

  7. Macrophytes • Ceratophyllum • No roots, dependant on water nutrients • Elodea • Grows in wide range of condition • Good habitat for aquatic animals • Valisneria • “eelgrass” or “tapegrass” • Sometimes forms underwater meadows

  8. Zooplankton • Cyclopoid and Calanoid Copepods • Cladocerans (Bosmina, Daphnia and Diaphanosoma) • Keratella • Polyarthra

  9. Benthic invertebrates • Gastropods (snails) • Zebra mussel • Introduced • Filter algae from water and wake it more clear • Chironomidae • Non-biting midges

  10. Exotic Species • Zebra mussel • Discovered in 1991 • Caused loss of 3 native clam species

  11. Water Chestnut • Can dramatically cover surface of water preventing little light from entering • Can also clog waterways

  12. Purple loosestrife • Displaces native wetland plants • Less suitable for wildlife than native plants

  13. Round Goby • Consume zebra mussels but also eat fish eggs

  14. Fishhook waterflea • Prey on zooplankton • Not edible by small fish

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