Hexagenia (Ephemeroptera) Population Recovery in Western Lake Erie Following the 1953 Catastrophe

Britt, N. Wilson

doi:10.2307/1929594

Cited by 39 publications

(13 citation statements)

References 2 publications

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“…An abrupt reduction in abundance of burrowing mayflies was observed by Britt (1955a) following a 2-week period (20 August to 3 September 1953) of warm, calm, and clear weather during which W < 1.9 m·s -1 (W max = 5.8 m·s -1 ) and the average near-bottom [O 2 ] = 2.3 mg·L -1 ([O 2 ] min = 0.70 mg·L -1 ). The mayfly population recovered quickly from this catastrophic event (Britt 1955b), but populations subsequently declined from approximately 1960 until the early 1990s when they began to recolonize the western basin. Schloesser et al (2000) have documented the recolonization and recovery of mayflies throughout the nearshore and much of the offshore environments of the western basin of Lake Erie except for two regions: (i) a small zone immediately downstream of the Detroit River, and (ii) a larger region that extends in a northeasterly direction from West Sister Island to Point Pelee (this region includes the site examined here).…”

Section: Environmental Implicationsmentioning

confidence: 99%

Environmental implications of stratification and turbulent mixing in a shallow lake basin

Loewen¹,

Ackerman²,

Hamblin³

2007

Can. J. Fish. Aquat. Sci.

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The extent of stratification and vertical mixing in the water column (7-11 m deep) was investigated over an offshore reef in the western basin of Lake Erie. Measurements reveal that the vertical transport of oxygen and heat is controlled by the complex interaction of several physical mechanisms. Generally, when the wind speed (W) was >7 m·s -1 and the air was cooler than the water (T air < T w ), the water column was well mixed due to turbulent mixing. However, when W < 7 m·s -1 (~65% of the summer), turbulence was too weak to overcome the stratification and mix the water column. An analysis of 25 years of meteorological data revealed that a period of 4.5 ± 1.9 days of calm, warm weather (W < 7 m·s -1 and T air > T w ) occurs every year. Results indicate that there is strong probability of hypoxia due to stratification (i.e., when diffusivities < 10 -6 m 2 ·s -1 ) and sediment oxygen demand (i.e., 0.1-1.0 g·m -2 ·day -1 ) during these periods. The environmental implications of stratification to water quality and its effects on benthic organisms, such as the burrowing mayfly (Hexagenia spp.), require further considerations in large temperate lakes and basins that are sufficiently shallow that there is no permanent seasonal stratification.Résumé : Nous avons étudié l'importance de la stratification et du brassage vertical dans la colonne d'eau (7-11 m de profondeur) sur un récif du large dans le bassin occidental du lac Érié. Nos mesures indiquent que le transport vertical de l'oxygène et de la chaleur est contrôlé par l'interaction complexe de plusieurs mécanismes physiques. Généralement, lorsque la vitesse du vent (W) est >7 m·s -1 et que l'air est plus frais que l'eau (T air < T w ), la colonne d'eau est bien brassée à cause de la turbulence. Cependant, lorsque W < 7 m·s -1 (~65 % de l'été), la turbulence est trop faible pour vaincre la stratification et brasser la colonne d'eau. Une analyse de 25 années de données météorologiques montre qu'une période de 4,5 ± 1,9 jours de chaleur et de calme (W < 7 m·s -1 et T air > T w ) se produit chaque année. Nos ré-sultats indiquent qu'il y a une forte probabilité d'hypoxie à cause de la stratification (par ex., lorsque les diffusions < 10 -6 m 2 ·s -1 ) et de la demande en oxygène des sédiments (par ex., 0,1-1,0 g·m -2 ·jour -1 ) durant ces périodes. Les consé-quences environnementales de la stratification sur la qualité de l'eau et ses effets sur les organismes benthiques, tels que les éphémères fouisseurs (Hexagenia spp.), nécessitent des études supplémentaires dans les grands lacs et bassins qui sont assez peu profonds pour qu'il n'y ait pas de stratification saisonnière.[Traduit par la Rédaction] Loewen et al. 57

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Section: Environmental Implicationsmentioning

confidence: 99%

Environmental implications of stratification and turbulent mixing in a shallow lake basin

Loewen¹,

Ackerman²,

Hamblin³

2007

Can. J. Fish. Aquat. Sci.

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“…As the bottom anoxia declined, macroinvertebrate prey (e.g., burrowing mayflies Hexagenia spp. ), which had declined in the 1950s due to deterioration of sediment quality (e.g., Britt, 1955;Carr & Hiltunen, 1965), experienced rapid recolonization beginning in 1991 (Kreiger et al, 1996). Several introduced species have had major impacts.…”

mentioning

confidence: 99%

Temporal Trends of Young-of-Year Fishes in Lake Erie and Comparison of Diel Sampling Periods

Stapanian

Bur

Adams

2006

Environ Monit Assess

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We explored temporal trends of young-of-year (YOY) fishes caught in bottom trawl hauls at an established offshore monitoring site in Lake Erie in fall during 1961-2001. Sampling was conducted during morning, afternoon, and night in each year. Catches per hour (CPH) of alewife (Alosa pseudoharengus) YOY were relatively low and exhibited no temporal trend. This result was consistent with the species' intolerance to Lake Erie's adverse winter water temperatures. Gizzard shad (Dorosoma cepedianum) YOY decreased sharply after 1991, which was consistent with recent oligotrophication of the lake. Following the establishment in 1979 and rapid increase of white perch (Morone americana) YOY, white bass (Morone chrysops) and freshwater drum (Aplodinotus grunniens) YOY decreased. Trout-perch (Percopsis omiscomaycus) YOY decreased during 1986-1991, but recovered to previous levels during 1991-2001. The recovery coincided with the resurgence of mayflies (Ephemoptera) in the lake. CPH of spottail shiner (Notropis hudsonius) and emerald shiner (N. atherinoides) YOY exhibited no temporal trend between 1961 and the late 1970s to early 1980s. CPH of yellow perch (Perca flavescens) YOY decreased during 1961-1988, and walleye (Sander vitreum) YOY increased overall during the time series. These observations were consistent with published studies of adults in the region. CPH of 4 of the 10 species of YOY considered were greatest during night. CPH for walleye YOY was higher in the morning than in the afternoon, but there was no significant difference between night and morning abundances. The results suggest that (1) CPH of YOY fishes may be a useful monitoring tool for Lake Erie, and (2) offshore monitoring programs that do not include night sampling periods may underestimate recruitment for several common species.

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“…We sampled the same four stations, which lay along an onshore-offshore transect on soft muddy bottoms. The dataset presented here is somewhat unusual in comparison to data from many of the other studies of western Lake Erie's benthic invertebrate community (e.g., Britt, 1955aBritt, , 1955bCarr and Hiltunen, 1965;Schloesser et al, 1995;Shelford and Boesel, 1942;Veal and Osmond, 1968;Wood, 1953), because it was collected over a long period of time (24 years) by the same investigators using the same sampling techniques. The samples were sieved at a smaller size fraction (250 μm) to collect more of the fauna than is typical of many studies that use sieve sizes ≥500 μm, and species level identifications were made by the same investigators.…”

Section: Introductionmentioning

confidence: 80%

Decadal changes in the benthic invertebrate community in western Lake Erie between 1981 and 2004

Soster

McCall

Herrmann

2011

Journal of Great Lakes Research

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Hexagenia (Ephemeroptera) Population Recovery in Western Lake Erie Following the 1953 Catastrophe

Cited by 39 publications

References 2 publications

Environmental implications of stratification and turbulent mixing in a shallow lake basin

Environmental implications of stratification and turbulent mixing in a shallow lake basin

Temporal Trends of Young-of-Year Fishes in Lake Erie and Comparison of Diel Sampling Periods

Decadal changes in the benthic invertebrate community in western Lake Erie between 1981 and 2004

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