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Spatial and Temporal Trends in Thermal Structure and Oxygen Depletion in Western Lake Erie

Golnick, Phoenix
http://orcid.org/0000-0002-1647-5719
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1449769244

Abstract Details

2015, Master of Science, University of Toledo, Biology (Ecology).
Periods of hot, calm weather can cause temporary thermal stratification and benthic hypoxia in the western basin of Lake Erie. The degree of hypoxia may be related to how quickly surface water temperature increases during periods of hot, calm weather and the resulting temperature difference between the surface and bottom waters. The effect of these periods of hot, calm weather may also vary depending on the temperature of the sediments, timing of the hot, calm weather, and the depth at which the temporary thermocline occurs. I explored patterns in thermal structure and oxygen depletion rates using in situ data collected in 2013 and 2014 by HOBO temperature and dissolved oxygen loggers. Oxygen depletion rates were calculated and piece-wise linear regression models and step function models were used to determine monthly oxygen depletion thresholds (TDcrit) based on surface to bottom temperature differences from May-September. In early summer, low TDcrit values paired with high depletion rates suggest that thermal stratification is not the contributing factor to low oxygen concentrations. However, in mid-summer, higher TDcrit values paired with high depletion rates suggested that oxygen depletion in mid-summer is due to thermal stratification.
Thomas Bridgeman (Advisor)
Song Qian (Committee Member)
Douglas Kane (Committee Member)
94 p.
Aquatic Sciences; Environmental Science; Limnology

Recommended Citations

Citations

  • Golnick, P. (2015). Spatial and Temporal Trends in Thermal Structure and Oxygen Depletion in Western Lake Erie [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1449769244

    APA Style (7th edition)

  • Golnick, Phoenix. Spatial and Temporal Trends in Thermal Structure and Oxygen Depletion in Western Lake Erie. 2015. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1449769244.

    MLA Style (8th edition)

  • Golnick, Phoenix. "Spatial and Temporal Trends in Thermal Structure and Oxygen Depletion in Western Lake Erie." Master's thesis, University of Toledo, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1449769244

    Chicago Manual of Style (17th edition)

toledo1449769244
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This open access ETD is published by University of Toledo and OhioLINK.