Lake Erie Central Basin Oxygen Depletion Changes from 1929–1980

Rosa, F.; Burns, N. M.

doi:10.1016/s0380-1330(87)71683-9

Cited by 78 publications

(50 citation statements)

References 12 publications

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“…The magnitude of this adjustment for Onondaga Lake (0-17%, average 6%) was remarkably similar to that calculated for Lake Erie's central basin (0-19%, average 8%; Rosa and Burns 1987). An analysis was conducted to investigate the sensitivity of the temperature adjustment to the range of values (1.04-1.13) reported by Zison et al (1978).…”

Section: Discussionsupporting

confidence: 77%

“…The abrupt, steplike, decrease in POC df following industry closure has provided a rare opportunity to resolve and characterize the effects on hypolimnetic DO resources. Changes in drivers for other long-term investigations have been more gradual by comparison (Rosa and Burns 1987;Lehman 1988). The POC df data have two temporal limitations in evaluating the extent of closure with the AHOD adj estimates.…”

Section: Discussionmentioning

confidence: 99%

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Long‐term changes in the areal hypolimnetic oxygen deficit (AHOD) of Onondaga Lake: Evidence of sediment feedback

Matthews

Effler

2006

Limnology & Oceanography

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Long-term trends in the rate of depletion of hypolimnetic dissolved oxygen (DO) are documented for ionically enriched hypereutrophic Onondaga Lake, New York, for the 1978-2002 interval. Depletion rates, represented as areal hypolimnetic oxygen deficits (AHOD, g m Ϫ2 d Ϫ1), are calculated on the basis of weekly DO profiles of 1-m resolution and estimates of coincident inputs of DO from overlying layers driven by vertical mixing. Vertical mixing inputs of DO are important in this system, representing from 15% to 37% (mean 25%) of AHOD. Interannual variations in hypolimnetic temperatures have comparatively minor (Ϯ6%) effects on AHOD. AHOD decreased 49%, from an average of 2.12 g m Ϫ2 d Ϫ1 for the 1978-1986 interval, to an average of 1.08 g m Ϫ2 d Ϫ1 for the 1997-2002 interval. This decrease was driven by an abrupt decrease in the deposition of particulate organic carbon into the hypolimnion starting in 1987. The magnitude of the decrease in AHOD closes reasonably well with decreases in both primary production in the trophogenic zone and organic carbon deposition to the tropholytic zone. The time course of the decrease in AHOD is consistent with localization of oxygen-demanding processes within the lake sediments, reflecting the progression of sediment diagenesis.

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Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Long‐term changes in the areal hypolimnetic oxygen deficit (AHOD) of Onondaga Lake: Evidence of sediment feedback

Matthews

Effler

2006

Limnology & Oceanography

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“…Equations 2 and 3 show that if A^w and K s remain constant in a lake over a period of time, AHDR and VHDR can be significantly altered by changes in d. This was found to be very much the case in Lake Erie where Rosa & Burns (1987) examined this problem and utilised a method to correct VHDR, calculated at different hypolimnion thicknesses, back to values at a standard hypolimnion thickness. Their method required having numerous values for VHDR at known hypolimnion thicknesses.…”

Section: Process 1: Effects Of Ambient Dissolved Oxygen (Do) Concentrmentioning

confidence: 99%

Using hypolimnetic dissolved oxygen depletion rates for monitoring lakes

Burns

1995

New Zealand Journal of Marine and Freshwater Research

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Volumetic hypolimnetic oxygen depletion, caused primarily by the decomposition of organic material in the hypolimnion (VHDR org ), is considered to be an important indicator of the trophic state of lakes and is used to detect change of trophic state. The observed volumetric hypolimnetic depletion rate (VHDR obs ) is usually different from VHDR org because of phenomena which can alter the concentrations of oxygen in the hypolimnion. The nine different phenomena which can affect the rate at which the observed hypolimnetic dissolved oxygen depletes are reviewed. In many instances, if the limnology of the system is understood, the perturbations to the hypolimnetic respiration rate, VHDR org caused by these phenomena can be ignored and VHDR obs used for lake management. Guidance is provided as to when the effects of these phenomena can be ignored and when they cannot be. Should corrections be necessary, methods for calculating the effects of physical perturbations are outlined. However, most of the effects caused by biological perturbations from changes in algal species cannot be eliminated, except for those caused by hypolimnetic production.

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“…Excessive nutrient loading during the mid-twentieth century [e.g., 1.61 9 10 5 and 2.73 9 10 4 metric tons of total nitrogen (N) and phosphorus (P), respectively, from 1966 to 1967 alone; Sly 1976] resulted in eutrophic waters in the western and central basins. Phytoplankton biomass increased with hypoxia/anoxia a common occurrence during the summer (Davis 1964;Rosa and Burns 1987).…”

Section: Introductionmentioning

confidence: 99%

Late-summer phytoplankton in western Lake Erie (Laurentian Great Lakes): bloom distributions, toxicity, and environmental influences

et al. 2009

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Phytoplankton abundance and composition and the cyanotoxin, microcystin, were examined relative to environmental parameters in western Lake Erie during late-summer (2003)(2004)(2005). Spatially explicit distributions of phytoplankton occurred on an annual basis, with the greatest chlorophyll (Chl) a concentrations occurring in waters impacted by Maumee River inflows and in Sandusky Bay. Chlorophytes, bacillariophytes, and cyanobacteria contributed the majority of phylogenetic-group Chl a basin-wide in 2003, 2004, and 2005, respectively. Water clarity, pH, and specific conductance delineated patterns of group Chl a, signifying that water mass movements and mixing were primary determinants of phytoplankton accumulations and distributions. Water temperature, irradiance, and phosphorus availability delineated patterns of cyanobacterial biovolumes, suggesting that biotic processes (most likely, resource-based competition) controlled cyanobacterial abundance and composition. Intracellular microcystin concentrations corresponded to Microcystis abundance and environmental parameters indicative of conditions coincident with biomass accumulations. It appears that environmental parameters regulate microcystin indirectly, via control of cyanobacterial abundance and distribution.

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Lake Erie Central Basin Oxygen Depletion Changes from 1929–1980

Cited by 78 publications

References 12 publications

Long‐term changes in the areal hypolimnetic oxygen deficit (AHOD) of Onondaga Lake: Evidence of sediment feedback

Long‐term changes in the areal hypolimnetic oxygen deficit (AHOD) of Onondaga Lake: Evidence of sediment feedback

Using hypolimnetic dissolved oxygen depletion rates for monitoring lakes

Late-summer phytoplankton in western Lake Erie (Laurentian Great Lakes): bloom distributions, toxicity, and environmental influences

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