scholarly journals Roles of Nutrient Limitation on Western Lake Erie CyanoHAB Toxin Production

Toxins ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 47
Author(s):  
Malcolm A. Barnard ◽  
Justin D. Chaffin ◽  
Haley E. Plaas ◽  
Gregory L. Boyer ◽  
Bofan Wei ◽  
...  
Keyword(s):  
Nutrient Limitation ◽  
Biomass Production ◽  
Lake Erie ◽  
Harmful Algal Bloom ◽  
Toxin Production ◽  
Western Basin ◽  
N Limitation ◽  
P Limitation ◽  
Western Lake ◽  
Western Lake Erie

Cyanobacterial harmful algal bloom (CyanoHAB) proliferation is a global problem impacting ecosystem and human health. Western Lake Erie (WLE) typically endures two highly toxic CyanoHABs during summer: a Microcystis spp. bloom in Maumee Bay that extends throughout the western basin, and a Planktothrix spp. bloom in Sandusky Bay. Recently, the USA and Canada agreed to a 40% phosphorus (P) load reduction to lessen the severity of the WLE blooms. To investigate phosphorus and nitrogen (N) limitation of biomass and toxin production in WLE CyanoHABs, we conducted in situ nutrient addition and 40% dilution microcosm bioassays in June and August 2019. During the June Sandusky Bay bloom, biomass production as well as hepatotoxic microcystin and neurotoxic anatoxin production were N and P co-limited with microcystin production becoming nutrient deplete under 40% dilution. During August, the Maumee Bay bloom produced microcystin under nutrient repletion with slight induced P limitation under 40% dilution, and the Sandusky Bay bloom produced anatoxin under N limitation in both dilution treatments. The results demonstrate the importance of nutrient limitation effects on microcystin and anatoxin production. To properly combat cyanotoxin and cyanobacterial biomass production in WLE, both N and P reduction efforts should be implemented in its watershed.

Nutrient limitation dynamics of western lake erie cyanoHAB biomass and toxin production

2021 ◽  
Author(s):  
Barnard Malcolm ◽  
Justin Chaffin ◽  
Haley Plaas ◽  
Greg Boyer ◽  
Bofan Wei ◽  
...  
Keyword(s):  
Nutrient Limitation ◽  
Lake Erie ◽  
Toxin Production ◽  
Western Lake ◽  
Western Lake Erie

scholarly journals Probabilistically assessing the role of nutrient loading in harmful algal bloom formation in western Lake Erie

2016 ◽  
Vol 42 (6) ◽  
pp. 1184-1192 ◽  
Author(s):  
Isabella Bertani ◽  
Daniel R. Obenour ◽  
Cara E. Steger ◽  
Craig A. Stow ◽  
Andrew D. Gronewold ◽  
...  
Keyword(s):  
Lake Erie ◽  
Nutrient Loading ◽  
Algal Bloom ◽  
Harmful Algal Bloom ◽  
Western Lake ◽  
Bloom Formation ◽  
Western Lake Erie

Migrations of Adult and Juvenile Walleyes (Stizostedion vitreum vitreum) in Southern Lake Huron, Lake St. Clair, Lake Erie, and Connecting Waters

1971 ◽  
Vol 28 (8) ◽  
pp. 1133-1142 ◽  
Author(s):  
R. G. Ferguson ◽  
A. J. Derksen
Keyword(s):  
Lake Erie ◽  
Lake Huron ◽  
Stizostedion Vitreum ◽  
Western Basin ◽  
Reverse Migration ◽  
The North ◽  
Western Lake ◽  
Young Of The Year ◽  
Thames River ◽  
Western Lake Erie

Recoveries of walleyes (Stizostedion vitreum vitreum) tagged as adults and juveniles at various sites in waters from southern Lake Huron to eastern Lake Erie provided information on the migrations of the Thames River stock and the mixing of these fish with other stocks in the study area. Walleyes spawning in the Thames River in March and April quickly migrated into the St. Clair River and southern Lake Huron, where they mingled with other stocks, including some from Lake Erie. The return migration to the Thames River occurred between November and March. Juvenile walleyes tagged in Lake St. Clair, on the other hand, moved downriver to Lake Erie. Young-of-the-year fish tagged in western Lake Erie, many presumably of Lake St. Clair origin, provided evidence of a reverse migration, since they tended to move back into Lake St. Clair and Lake Huron as they matured. Adult walleyes tagged along the Canadian shore of Lake Erie migrated eastward during the summer, but were recovered in or near the western basin during the spawning season. Thus, western Lake Erie appeared as a juvenile milling or mixing area during the summer, whereas southern Lake Huron and the north shore of central and eastern Lake Erie were adult areas.

Removal of algae by the zebra mussel (Dreissena polymorpha) population in western Lake Erie: a bioenergetics approach

1995 ◽  
Vol 52 (2) ◽  
pp. 381-390 ◽  
Author(s):  
Charles P. Madenjian
Keyword(s):  
Primary Production ◽  
Water Column ◽  
Zebra Mussel ◽  
Dreissena Polymorpha ◽  
Lake Erie ◽  
Mussel Population ◽  
Western Basin ◽  
Bioenergetics Model ◽  
Western Lake ◽  
Western Lake Erie

A bioenergetics model for growth of a zebra mussel (Dreissena polymorpha) individual was verified with observations on zebra mussel growth in western Lake Erie. The bioenergetics model was then applied to the zebra mussel population in the western basin of Lake Erie to estimate the removal of phytoplankton by mussels. According to the modeling results, the zebra mussel population consumed 5.0 million tonnes of phytoplankton, while 1.4 million tonnes of phytoplankton was deposited in pseudofeces from the mussels. Thus, a total of 6.4 ± 2.4 million tonnes of phytoplankton was removed from the water column by zebra mussel in western Lake Erie during 1990. Primary production was estimated to be 24.8 million tonnes; therefore, zebra mussel removed the equivalent of 26 ± 10% of the primary production for western Lake Erie.

The formation and evolution of Point Pelee, western Lake Erie

1976 ◽  
Vol 13 (1) ◽  
pp. 136-144 ◽  
Author(s):  
J. P. Coakley
Keyword(s):  
Lake Erie ◽  
Present Position ◽  
Lake Levels ◽  
Western Basin ◽  
Beach Ridges ◽  
Western Lake ◽  
Formation And Evolution ◽  
Position And Orientation ◽  
Point Pelee ◽  
Western Lake Erie

Point Pelee originated as a sandy foreland enclosing a marsh approximately 4000 years BP. A reconstruction of paleoenvironmental conditions prior to that time suggests strongly that it was formed initially by the progressive merging of beach ridges and dunes formed on opposite sides of the Pelee-Lorain moraine when rising lake levels in the western basin of Lake Erie were 3 to 4 m below present lake datum (173.4 m above sea level). Since that time, it has retreated to its present position and orientation under the influence of slowly rising lake levels and increasing wave energy from both sides.Such an evolution, though different from conventional mechanisms of spit formation, is supported by evidence derived from the local post glacial stratigraphy and the geomorphology of relict features preserved on the Point and on the shoal area to the south.

scholarly journals Changes in Prey Fish Populations in Western Lake Erie, 1969–88, as Related to Walleye, Stizostedion vitreum, Predation

1993 ◽  
Vol 50 (6) ◽  
pp. 1289-1298 ◽  
Author(s):  
Roger L. Knight ◽  
Bruce Vondracek
Keyword(s):  
Species Composition ◽  
Lake Erie ◽  
Fish Community ◽  
Abundant Species ◽  
Stizostedion Vitreum ◽  
Alosa Pseudoharengus ◽  
Prey Fish ◽  
Western Basin ◽  
Western Lake ◽  
Western Lake Erie

Relative abundance of the total prey fish community in the western basin of Lake Erie varied little from 1969 to 1988, but species composition changed significantly. Soft-rayed fishes such as emerald shiner, Notropis atherinoides, spottail shiner, N. hudsonius, and alewife, Alosa pseudoharengus, declined significantly after 1977 whereas only one spiny-rayed species, white bass, Morone chrysops, declined over the same period. Trout-perch, Percopsis omiscomaycus, a relatively abundant species rarely eaten by piscivores in this system, experienced only minor shifts in abundance between 1969 and 1988. Although several factors could be responsible for the shift in species composition, predation by increasingly abundant walleye, Stizostedion vitreum, played a major role. Walleye prefer to eat soft-rayed fishes; thus, observed shifts in the community match expectations of selection noted in the diet. We suggest that management goals focusing primarily on walleye affected not only the targeted species but the entire fish community of western Lake Erie.

Increased deposition of organic matter, polychlorinated biphenyls, and cadmium by zebra mussels (Dreissena polymorpha) in western Lake Erie

1998 ◽  
Vol 55 (5) ◽  
pp. 1131-1139 ◽  
Author(s):  
Evan P Dobson ◽  
Gerald L Mackie
Keyword(s):  
Organic Matter ◽  
Polychlorinated Biphenyls ◽  
Dreissena Polymorpha ◽  
Lake Erie ◽  
Unit Area ◽  
Zebra Mussels ◽  
Suspended Material ◽  
Western Basin ◽  
Western Lake ◽  
Western Lake Erie

Biodeposition of organic matter, polychlorinated biphenyls (PCBs), and cadmium (Cd) by zebra mussels (Dreissena polymorpha) was investigated at five stations in the western basin of Lake Erie during the summer of 1992. Biodeposition rates at the five stations were determined by using sediment traps and converted to per unit area values to facilitate comparisons with natural sedimentation rates. Biodeposition of suspended material by zebra mussels was up to 8 times greater than sedimentation in the traps. Concentrations of organic matter, PCBs, and Cd were determined for the biodeposits and the sedimented material. There were no significant differences in concentration of organic matter, PCBs, or Cd between the two types of material. Biodeposition rates per unit area of organic matter, PCBs, and Cd were 8-10 times greater than corresponding values for natural sedimentation; therefore, the natural sedimentation processes of these factors appear to be greatly accelerated in the presence of zebra mussels. Results support the possibility that zebra mussels are altering contaminant movement in western Lake Erie, as well as clarifying the water column by removing suspended material.

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