Oxygen Depletion in Lake Erie: Has There Been Any Change?

1980 ◽  
Vol 37 (1) ◽  
pp. 72-80 ◽  
Author(s):  
M. N. Charlton
Keyword(s):  
High Temperatures ◽  
Lake Erie ◽  
Oxygen Depletion ◽  
General Level ◽  
Central Basin ◽  
Small Lakes ◽  
Hypolimnetic Oxygen ◽  
Depletion Rate

A new analysis of hypolimnetic oxygen in Central Lake Erie indicates that historic increases in the apparent depletion were not as great as formerly believed. The differences that did occur were mostly related to variations in hypolimnion thickness. Changes, if any, in the oxygen depletion rate due to eutrophication are as yet too small to be recognized. Present-day oxygen depletion rates, when corrected for the relatively high temperatures in Lake Erie, are within the range thought to be indicative of mesotrophy in small lakes. The general level of oxygen depletion observed in the Central Basin of Lake Erie is expected on the basis of morphology alone.Key words: Lake Erie, oxygen, hypolimnion, oxygen depletion, trend

Oxygen Depletion in the Central and Eastern Basins of Lake Erie, 1970

1976 ◽  
Vol 33 (3) ◽  
pp. 512-519 ◽  
Author(s):  
N. M. Burns
Keyword(s):  
Hydrodynamic Model ◽  
Lake Erie ◽  
Trophic State ◽  
Oxygen Depletion ◽  
Eastern Basin ◽  
Hypolimnetic Oxygen ◽  
Depletion Rate

The hypolimnetic oxygen depletion rate is required to be measured to an accuracy of approximately 3% if major changes in the trophic state of Lake Erie are to be documented within about 5 yr of the change commencing. Depletion rate measurements of this level of accuracy require a knowledge of the reoxygenation of the Central and Eastern basin hypolimnia and the transport of oxygen between the hypolimnia. A model is described here that enables an estimate of the degree of hypolimnetic reoxygenation to be made. The transport of oxygen between the hypolimnia was estimated by means of a hydrodynamic model. The resultant calculations gave areal hypolimnetic depletion rate values of 0.43 and 0.87 g O2 m−2 day−1 for the Central and Eastern basins, respectively, and volumetric depletion rates of 0.13 and 0.057 g O2 m−3 day−1, respectively, for these basins during 1970.

Hypolimnetic Oxygen Depletion Dynamics in the Central Basin of Lake Erie

2005 ◽  
Vol 31 ◽  
pp. 262-271 ◽  
Author(s):  
William J. Edwards ◽  
Joseph D. Conroy ◽  
David A. Culver
Keyword(s):  
Lake Erie ◽  
Oxygen Depletion ◽  
Central Basin ◽  
Hypolimnetic Oxygen

Vertical Transport of Oxygen into the Hypolimnion of Lakes

1987 ◽  
Vol 44 (4) ◽  
pp. 852-858 ◽  
Author(s):  
R. J. Cornett ◽  
F. H. Rigler
Keyword(s):  
Heat Budget ◽  
Eddy Diffusivity ◽  
Oxygen Depletion ◽  
Vertical Transport ◽  
Oxygen Deficit ◽  
Eddy Diffusivities ◽  
Oxygen Gradients ◽  
Hypolimnetic Oxygen ◽  
Depletion Rate ◽  
Flux Parameter

Rates of vertical transport of oxygen into the hypolimnion were calculated by multiplying the vertical eddy diffusivity coefficients, determined from the heat budget, by the measured gradients in oxygen concentration. In 12 lakes, transport ranged from 0 to 70 mg O2∙m−2∙d−1 and was insensitive to the depth defining the upper boundary of the hypolimnion. Oxygen was transported into the hypolimnion of lakes with a thinner hypolimnion and out of the hypolimnion of lakes with a thick hypolimnion. Transport averaged 4% of the measured total rate of hypolimnetic oxygen depletion and < 10% of the depletion rate in individual strata. Pooling these results with published estimates of oxygen gradients and eddy diffusivities suggests that in lakes with different trophic status (phosphorus levels 4–100 μg∙L−1) and size (areas from 0.4 to 70 km2), vertical oxygen transport accounts for less than 15% of the hypolimnetic oxygen deficit. Oxygen depletion models will gain relatively little precision by including a vertical transport flux parameter.

Potential impact of Chironomus plumosus larvae on hypolimnetic oxygen in the central basin of Lake Erie

2015 ◽  
Vol 41 (2) ◽  
pp. 348-357 ◽  
Author(s):  
Frederick M. Soster ◽  
Gerald Matisoff ◽  
Donald W. Schloesser ◽  
William J. Edwards
Keyword(s):  
Lake Erie ◽  
Central Basin ◽  
Chironomus Plumosus ◽  
Hypolimnetic Oxygen ◽  
Potential Impact

Hypolimnion Oxygen Consumption in Lakes: Discussion of Productivity and Morphometry Effects

1980 ◽  
Vol 37 (10) ◽  
pp. 1531-1539 ◽  
Author(s):  
M. N. Charlton
Keyword(s):  
Oxygen Consumption ◽  
Great Lakes ◽  
Lake Erie ◽  
Oxygen Depletion ◽  
Laurentian Great Lakes ◽  
Small Lakes ◽  
Multiplicative Effects ◽  
The Relationship ◽  
Oxygen Concentrations

Until recently, hypolimnion oxygen consumption was thought to be a way of comparing the productivity of lakes. This study shows that hypolimnion oxygen represents hypolimnion thickness and temperature as well as productivity. A relationship based on the multiplicative effects of chlorophyll (productivity), thickness, and temperature closely fits the observed oxygen depletion in the Laurentian Great Lakes and in many small lakes. Applied to Lake Erie, the relationship suggests that although a 50% decrease in productivity may result in higher oxygen concentrations, significant oxygen depletion would still occur. The use of oxygen concentrations, depletion rates, or areal deficits to compare the productivity of lakes is not justified without reference to hypolimnion thickness and temperature.Key words: lake, hypolimnion, oxygen, productivity, Lake Erie

“Dead Zone” dynamics in Lake Erie: the importance of weather and sampling intensity for calculated hypolimnetic oxygen depletion rates

2010 ◽  
Vol 73 (2) ◽  
pp. 289-304 ◽  
Author(s):  
Joseph D. Conroy ◽  
Leon Boegman ◽  
Hongyan Zhang ◽  
William J. Edwards ◽  
David A. Culver
Keyword(s):  
Lake Erie ◽  
Dead Zone ◽  
Oxygen Depletion ◽  
Sampling Intensity ◽  
Hypolimnetic Oxygen

scholarly journals Relationship between areal hypolimnetic oxygen depletion rate and the trophic state of five lakes in northern Poland

2011 ◽  
Vol 11 (4) ◽  
pp. 135-142 ◽  
Author(s):  
Dariusz Borowiak ◽  
Kamil Nowiński ◽  
Jacek Barańczuk ◽  
Włodzimierz Marszelewski ◽  
Rajmund Skowron ◽  
...  
Keyword(s):  
Total Nitrogen ◽  
Trophic State ◽  
Oxygen Depletion ◽  
Water Transparency ◽  
Morphological Data ◽  
Lake Productivity ◽  
Stratified Lakes ◽  
Northern Poland ◽  
Hypolimnetic Oxygen ◽  
Depletion Rate

Relationship between areal hypolimnetic oxygen depletion rate and the trophic state of five lakes in northern PolandThe oxygen content in a lake is a fundamental factor in lake ecology. In stratified lakes, deep waters are isolated from the atmosphere for several months during the summer; therefore, oxygen (substantially consumed by biological and chemical processes at this time) cannot be replaced before the autumnal mixing period. Hypolimnetic oxygen depletion has been considered an indicator of lake productivity since the early twentieth century. Many recent studies have been in opposition to this view by showing that the areal hypolimnetic oxygen depletion rate (AHOD) is poorly correlated with seston biomass and/or phosphorus concentration. The objective of this study is to show relationships between the mean values of total phosphorus (TP), total nitrogen (TN), chlorophyll a, and water transparency (Secchi disk depth, SDD) during the thermal stratification formation period and the AHOD rate. Hypolimnetic oxygen conditions in five dimictic lakes in northern Poland were examined in 2009 and 2010. Two of them were studied in the previous year. Monthly oxygen profiles taken from April to August, midsummer temperature profiles, and morphological data of the lakes were used to determine the AHOD rate. Standard water quality parameters such as concentrations of chlorophyll a, TP, and TN, as well as water transparency measured at the same time were used to calculate the trophic state indices (TSI) according to the Carlson-type formulas. On the basis of the collected data it is shown that AHOD is highly correlated with the TSI value for chlorophyll a, and poorly correlated with the TSI values for water transparency and phosphorus content. The best correlation between AHOD and TSI has been found for chlorophyll a (r2=0.702; p<0.001), as well as for overall TSI, determined by averaging separate component indices (r2=0.826; p<0.000). No correlation was found between AHOD and total nitrogen concentration. The research also confirmed previous observations, which pointed to a significant role of the hypolimnion depth in increasing oxygen deficits.

Lake Erie Central Basin Oxygen Depletion Changes from 1929–1980

1987 ◽  
Vol 13 (4) ◽  
pp. 684-696 ◽  
Author(s):  
Fernando Rosa ◽  
Noel M. Burns
Keyword(s):  
Lake Erie ◽  
Oxygen Depletion ◽  
Central Basin

Trends in Temperature, Secchi Depth, and Dissolved Oxygen Depletion Rates in the Central Basin of Lake Erie, 1983–2002

2005 ◽  
Vol 31 ◽  
pp. 35-49 ◽  
Author(s):  
Noel M. Burns ◽  
David C. Rockwell ◽  
Paul E. Bertram ◽  
David M. Dolan ◽  
Jan J.H. Ciborowski
Keyword(s):  
Dissolved Oxygen ◽  
Lake Erie ◽  
Secchi Depth ◽  
Oxygen Depletion ◽  
Central Basin
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