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Oneida Lake By: Don Maryanski. 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. Physical properties.

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Oneida lake by don maryanski l.jpg

Oneida LakeBy: Don Maryanski


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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


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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


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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



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Phytoplankton

  • Epilimnion

    • Aulacosira

    • Microcystis

    • Small flagellates

    • Metalimnion

      • Aulacosira

      • Microcystis

      • Mallanomous

      • Small flagellates

    • Hypolimnion

      • Aulacosira

      • Microcystis

      • acinastrum


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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


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Zooplankton

  • Cyclopoid and Calanoid Copepods

  • Cladocerans (Bosmina, Daphnia and Diaphanosoma)

  • Keratella

  • Polyarthra


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Benthic invertebrates

  • Gastropods (snails)

  • Zebra mussel

    • Introduced

    • Filter algae from water and wake it more clear

  • Chironomidae

    • Non-biting midges


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Exotic Species

  • Zebra mussel

    • Discovered in 1991

    • Caused loss of 3 native clam species


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Water Chestnut

  • Can dramatically cover surface of water preventing little light from entering

  • Can also clog waterways


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Purple loosestrife

  • Displaces native wetland plants

  • Less suitable for wildlife than native plants


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Round Goby

  • Consume zebra mussels but also eat fish eggs


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Fishhook waterflea

  • Prey on zooplankton

  • Not edible by small fish


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