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Boundary Dynamics of the Hypoxic Hypolimnion of Lake Erie's Central Basin

The distributions and productivity of benthic invertebrates (quality   and availability of fish food) in Lake Erie's central basin may be   highly influenced by summer hypoxia. Data on dissolved oxygen (DO)   depletion in shallow waters has been lacking. We predicted episodic,   short-term (days-long or hours-long) intrusions of hypoxic (<2 mg/L)   hypolimnion water into nearshore areas. We recorded DO   concentrations once or twice a day during intervals of 3 to 4 days   in July and August 2  6 along depth gradients (7.4 m-16.9 m) near   Lorain, Ohio. The region of hypoxia followed the contour of the lake   bottom, being shallower in nearshore waters and deeper further   offshore. At a given site, the thickness of hypoxic water varied by   1.5 m over a few hours. DO concentrations <1 mg/L were found briefly   as shallow as 1  m in July. DO <1 mg/L was generally restricted to   depths >16 m during our July sampling interval and >14.5 m during   the August interval.     The project concluded that:  1) hypoxic events of sufficient duration to impact invertebrate and   fish communities probably occur frequently in nearshore waters of   the central basin, and   2) elevated oxygen demand of sediments beneath shallow inshore   waters is sufficiently great to result in hypoxia or anoxia near the   sediment-water interface even at depths above the hypolimnion.    The above findings should correlate with the structure of the   benthic invertebrate communities both within and beyond the observed   lateral excursions of the hypolimnion and should help to explain the   distributions of oxygen-sensitive taxa such as Hexagenia spp.   (burrowing mayflies) and Dreissena spp. (zebra and quagga mussels).     (hypoxia); (Lake erie); (Ohio); (eutrophication); (sediment);   (sediments); (hypoxic condition); (hypoxic conditions); (AIS);   (aquatic invasive species); (ANS); (aquatic nuisance species);   (exotic species); (Hexagenia spp); (mayfly); (mayflies);   (Dreissenids); (Dressenid); (zebra mussel); (zebra mussels); (quagga   mussel); (quagga mussels); (Dreissena polymorpha); (Dreissena   rostriformis bugensis); (Dreissena bugensis)

In progress
Start Date
End Date
Kenneth A. KriegerPrincipal Investigator
Associated with 3 projects
State of Ohio $ 0.00USDEstimates

Funding 8 projects for a total of $223,131.00

Funding 15 projects for a total of $599,045.00

Funding 1 projects for a total of $0.00
Scope of Study
Field Investigation
Laboratory Investigation
Scale of Phenomena
Impact of Pollutants
Exotic Species
Nutrients, Including Phosphorus
Land Use and Habitat
Lake Basin Connecting Channels
Lake Erie
State Province
Region Being Monitored
Near and OpenShore Waters
Resource Being Monitored
Bottom Sediment
Societal/Surface Water
Suspended Sediments
Beneficial Use Impairment Assessments
Degradation of Aesthetics
Degradation of Benthos
Eutrophication or Undesirable Algae
Spread of Established ANS Populations
Range of Spread
Annex Numbers
Research & Development
Annex 17
Impact of water quality and AIS on fish and wildlife populations and habitats
  • Annex Numbers
    Annex Numbers
    Research & Development
  • Annex 17
    Annex 17
    Impact of water quality and AIS on fish and wildlife populations and habitats

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