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

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

2009 ◽  
Vol 43 (4) ◽  
pp. 915-934 ◽  
Author(s):  
David F. Millie ◽  
Gary L. Fahnenstiel ◽  
Julianne Dyble Bressie ◽  
Ryan J. Pigg ◽  
Richard R. Rediske ◽  
...  
Keyword(s):  
Great Lakes ◽  
Lake Erie ◽  
Environmental Influences ◽  
Late Summer ◽  
Laurentian Great Lakes ◽  
Western Lake ◽  
Western Lake Erie

scholarly journals The Relationship between Mollusks and Oxygen Concentrations in Todos Santos Bay, Baja California, Mexico

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
J. Gabriel Kuk-Dzul ◽  
Victoria Díaz-Castañeda
Keyword(s):  
Organic Matter ◽  
Dissolved Oxygen ◽  
Bottom Water ◽  
Organic Matter Content ◽  
Oxygen Depletion ◽  
Matter Content ◽  
The Other ◽  
Natural Conditions ◽  
The Relationship ◽  
Oxygen Concentrations

This study describes the relationship between mollusks, physicochemical properties of seawater, and sediments under natural conditions of low impact. Thirty-nine stations were sampled in October 1994 using a Van Veen grab (0.1 m−2). Temperature, salinity, and dissolved oxygen (DO) concentrations of bottom water were obtained with a CTD. Organic matter content and sediment grain analysis were determined. A total of 836 mollusks were collected. Gastropoda was the most abundant (52%) and diverse class with 27 genera, followed by Bivalvia with eight genera and Scaphopoda with only one genus. According to CCA analysis, dominant mollusks were significantly related with high DO concentrations.Donax,Natica,Acteocina,Bulla,Anachis,Odostomia, andCrucibulumcan be classified as sensitive genera because they were found mainly in high oxygen concentrations (3.1–5.6 mL L−1); on the other hand,Cardiomya,Nuculana,Laevicardium,Chione,Truncatella, andDentaliumcan be classified as tolerant genera (1.0–5.6 mL L−1). Todos Santos Bay hosts a diverse malacological fauna (36 genera); our results show that the dominant genera were mainly related to high dissolved oxygen concentrations. Mollusks can be a useful tool in environmental monitoring programs related with oxygen depletion in coastal areas.

scholarly journals Influence of Lake Erie on a Lake Ontario Lake-Effect Snowstorm

2018 ◽  
Vol 57 (9) ◽  
pp. 2019-2033 ◽  
Author(s):  
David A. R. Kristovich ◽  
Luke Bard ◽  
Leslie Stoecker ◽  
Bart Geerts
Keyword(s):  
Boundary Layer ◽  
Great Lakes ◽  
Moisture Transport ◽  
Lake Erie ◽  
Surface Wind ◽  
Lake Ontario ◽  
Laurentian Great Lakes ◽  
Lake Surface ◽  
High Moisture ◽  
Lake Effect

AbstractAnnual lake-effect snowstorms, which develop through surface buoyant instability and upward moisture transport from the Laurentian Great Lakes, lead to important local increases in snowfall to the south and east. Surface wind patterns during cold-air outbreaks often result in areas where the air is modified by more than one Great Lake. While it is known that boundary layer air that has crossed multiple lakes can produce particularly intense snow, few observations are available on the process by which this occurs. This study examines unique observations taken during the Ontario Winter Lake-effect Systems (OWLeS) field project to document the process by which Lake Erie influenced snowfall that was produced over Lake Ontario on 28 January 2014. During the event, lake-effect clouds and snow that developed over Lake Erie extended northeastward toward Lake Ontario. OWLeS and operational observations showed that the clouds from Lake Erie disappeared (and snow greatly decreased) as they approached the Lake Ontario shoreline. This clear-air zone was due to mesoscale subsidence, apparently due to the divergence of winds moving from land to the smoother lake surface. However, the influence of Lake Erie in producing a deeper lake-effect boundary layer, thicker clouds, increased turbulence magnitudes, and heavier snow was identified farther downwind over Lake Ontario. It is hypothesized that the combination of a low-stability, high-moisture boundary layer as well as convective eddies and limited snow particles crossing the mesoscale subsidence region locally enhanced the lake-effect system over Lake Ontario within the plume of air originating over Lake Erie.

scholarly journals Molecular Enumeration of an Ecologically Important Cyanophage in a Laurentian Great Lake

2011 ◽  
Vol 77 (19) ◽  
pp. 6772-6779 ◽  
Author(s):  
Audrey R. Matteson ◽  
Star N. Loar ◽  
Richard A. Bourbonniere ◽  
Steven W. Wilhelm
Keyword(s):  
Great Lakes ◽  
Quantitative Pcr ◽  
Great Lake ◽  
Lake Erie ◽  
Laurentian Great Lakes ◽  
Ecological Relevance ◽  
Lake System ◽  
Considerable Research ◽  
Viral Communities ◽  
Virus Community

ABSTRACTConsiderable research has shown that cyanobacteria and the viruses that infect them (cyanophage) are pervasive and diverse in global lake populations. Few studies have seasonally analyzed freshwater systems, and little is known about the bacterial and viral communities that coexist during the harsh winters of the Laurentian Great Lakes. Here, we employed quantitative PCR to estimate the abundance of cyanomyoviruses in this system, using the portal vertexg20gene as a proxy for cyanophage abundance and to determine the potential ecological relevance of these viruses. Cyanomyoviruses were abundant in both the summer and the winter observations, with up to 3.1 × 106copies ofg20genes ml−1found at several stations and depths in both seasons, representing up to 4.6% of the total virus community. Lake Erie was productive during both our observations, with high chlorophyllaconcentrations in the summer (up to 10.3 μg liter−1) and winter (up to 5.2 μg liter−1). Both bacterial and viral abundances were significantly higher during the summer than during the winter (P< 0.05). Summer bacterial abundances ranged from 3.3 × 106to 1.6 × 107ml−1while winter abundances ranged between ∼3.4 × 105and 1.2 × 106ml−1. Total virus abundances were high during both months, with summer abundances significantly higher at most stations, ranging from 6.5 × 107to 8.8 × 107ml−1, and with winter abundances ranging from 3.4 × 107to 6.6 × 107ml−1. This work confirms that putative cyanomyoviruses are ubiquitous in both summer and winter months in this large freshwater lake system and that they are an abundant component of the virioplankton group.

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

Dramatic Decline of Unionid Bivalves in Offshore Waters of Western Lake Erie After Infestation by the Zebra Mussel, Dreissena polymorpha

1994 ◽  
Vol 51 (10) ◽  
pp. 2234-2242 ◽  
Author(s):  
Don W. Schloesser ◽  
Thomas F. Nalepa
Keyword(s):  
Great Lakes ◽  
Zebra Mussel ◽  
Dreissena Polymorpha ◽  
Lake Erie ◽  
Zebra Mussels ◽  
Laurentian Great Lakes ◽  
Western Lake ◽  
Dramatic Decline ◽  
Heavy Infestation ◽  
Western Lake Erie

Unionid bivalves and attached epizoic zebra mussels (Dreissena polymorpha) were collected at one index station in 1989, 1990, and 1991 and at 17 stations in 1991 in offshore waters of western Lake Erie of the Laurentian Great Lakes. Sampling at the index station revealed that the proportion of live unionids declined from 53% in September 1989 to 17% in May–June 1990 and to 0% in September 1990: this 100% mortality coincided with heavy infestation by zebra mussels. Quantitative sampling with a Ponar grab at the 17 stations in 1991 revealed a widespread and dramatic reduction in unionid populations. In 1982, five unionid species occurred at 35% of the stations at a density of 4/m2, whereas in 1991, no live unionid species were found. Qualitative sampling with an epibenthic sled at the 17 stations in 1991 yielded only 4 live specimens of 2 species (Amblema plicata plicata and Fusconaia flava) and 187 dead specimens of 10 species. These and other results indicate that unionid populations are being negatively affected by zebra mussels in the Great Lakes. Similar impacts on unionids are expected to occur where zebra mussels become abundant throughout North America.

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