Oneida Lake By: Don Maryanski

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Presentation transcript:

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 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

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

Temperature profile

Phytoplankton Epilimnion Aulacosira Microcystis Small flagellates Metalimnion Mallanomous Hypolimnion acinastrum

Macrophytes Ceratophyllum Elodea Valisneria 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

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

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

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

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

Purple loosestrife Displaces native wetland plants Less suitable for wildlife than native plants

Round Goby Consume zebra mussels but also eat fish eggs

Fishhook waterflea Prey on zooplankton Not edible by small fish