Role of algae in the diet of Chironomus plumosus F. semireductus from the Bay of Quinte, Lake Ontario

Hydrobiologia ◽  
1983 ◽  
Vol 107 (3) ◽  
pp. 237-247 ◽  
Author(s):  
Ora E. Johannsson ◽  
Janet L. Beaver
Keyword(s):  
Lake Ontario ◽  
Chironomus Plumosus

A bioturbator, a holobiont, and a vector: The multifaceted role of Chironomus plumosus in shaping N‐cycling

2021 ◽  
Author(s):  
Tobia Politi ◽  
Rūta Barisevičiūte ◽  
Marco Bartoli ◽  
Stefano Bonaglia ◽  
Ulisse Cardini ◽  
...  
Keyword(s):  
N Cycling ◽  
Chironomus Plumosus

Physical Behaviour of Lake Ontario with Reference to Contaminant Pathways and Climate Change

1991 ◽  
Vol 48 (8) ◽  
pp. 1517-1528 ◽  
Author(s):  
F. M. Boyce ◽  
W. M. Schertzer ◽  
P. F. Hamblin ◽  
C. R. Murthy
Keyword(s):  
Climate Warming ◽  
Organic Contaminants ◽  
Global Climate ◽  
Thermal Structure ◽  
Lake Ontario ◽  
Large Lake ◽  
Physical Behaviour ◽  
The Past ◽  
Physical Measurements

Current understanding of the physical behaviour of Lake Ontario is assessed. In particular, the role of water movements in the distribution and fate of contaminants is described, and our ability to anticipate the results of global climate warming on the Great Lakes is surveyed. In the past two decades, the general features of large-lake circulation and mixing have been successfully delineated, although detailed climatological studies will be required for particular sites of interest or concern. More sophisticated models of thermal structure will be needed to assess the potential consequences of climate warming, particularly in the matter of convective overturning. The process of "sediment focusing," so strongly linked to the fate of many organic contaminants, is only recently amenable to study with instruments that respect the time and space scales of resuspension and settling. The rates of transfer of gases and contaminants across the air–water interface are known to depend on wind and wave conditions; this dependence is being explored. Experience over the past 20 yr has consistently shown that large-lake studies of chemical and biological processes are difficult if not impossible to interpret in the absence of an adequate base of concurrent physical measurements.

The role of hatcheries in the decline of Lake Ontario Atlantic Salmon

2021 ◽  
Author(s):  
Brian P Morrison ◽  
Kathryn Peiman
Keyword(s):  
Atlantic Salmon ◽  
Lake Ontario ◽  
Genetic Effects ◽  
Perceived Benefits ◽  
Hatchery Fish

Lake Ontario Atlantic Salmon were one of the first species of fish to be cultured in Canada. Their story goes from abundance in the 1700s to protective legislation in 1807, then hatchery culture in 1866 and finally ends in extirpation in 1898. The standard narrative is that Samuel Wilmot’s hatchery efforts briefly staved off their loss from the Lake Ontario basin. However, that story is replete with inaccurate assumptions, unfounded faith in technological solutions, and a belief that numbers of fish released was an accurate measure of success. We challenge the narrative around the perceived benefits of these hatchery efforts and suggest instead that they contributed to the decline of Atlantic Salmon in Lake Ontario through the mining of wild gametes, transferring eggs out of basin, mixing locally-adapted populations across streams, and the negative genetic effects of releasing hatchery fish.

Rehabilitation of Lake Ontario: the Role of Nutrient Reduction and Food Web Dynamics

1991 ◽  
Vol 48 (8) ◽  
pp. 1574-1580 ◽  
Author(s):  
John H. Hartig ◽  
James F. Kitchell ◽  
Donald Scavia ◽  
Stephen B. Brandt
Keyword(s):  
Water Quality ◽  
Great Lakes ◽  
Food Web ◽  
Toxic Substance ◽  
Lake Ontario ◽  
The United States ◽  
Food Web Dynamics ◽  
Food Web Interactions ◽  
The Impact

The Laurentian Great Lakes have a complex history of changes due to eutrophication, invasion of exotic species, and fisheries and phosphorus management practices. Remedial actions have reduced nutrient loadings and enhanced the role of food web interactions in improving water quality. Workshops sponsored through the United States – Canada international Joint Commission have addressed the relative importance of nutrient abatement and/or food web manipulation in affecting water quality trends. Both controls have combined to enhance water clarity in Lake Michigan. Lake Ontario has already exhibited the effects of nutrient controls and may be on the verge of manifesting food web controls. Research and monitoring recommendations to elucidate the effects of nutrient and food web controls include the following: (1) water quality and fisheries agencies must coordinate monitoring activities, standardize techniques, and establish and maintain long-term data sets to evaluate the effects of water quality and fisheries programs separately and together; (2) controlled, mesoscale, whole-system experiments should be performed to quantify rates (e.g. growth, predation, etc.) of food web interactions; and (3) the scientific community should promote research which quantifies the impact of changes in food web dynamics on changes in toxic substance levels in Great Lakes fishes.

“And How Pretty They Are!”: Lawn Tennis, Tourism, and Gender Relations at Niagara-on-the-Lake, Ontario, 1880s-1920s

2021 ◽  
pp. 009614422098334
Author(s):  
Robert J. Lake
Keyword(s):  
Nineteenth Century ◽  
Middle Class ◽  
Gender Relations ◽  
Lake Ontario ◽  
Tourism Industry ◽  
High Class ◽  
Role Of Women ◽  
Upper Middle Class ◽  
And Gender

In the four decades straddling the turn of the nineteenth century, the small Ontario town of Niagara-on-the-Lake experienced marked growth in its tourism industry. Catering predominantly to wealthy upper-middle-class Canadian and American visitors, the lake-side settlement offered numerous opportunities for polite recreation. Chief among them was lawn tennis, a sport that sat somewhat outside of the mainstream in terms of its high-class, mixed-sex participation demographic. While its players were imbued with a strong amateur philosophy, local boosters recognized the sport’s potential to generate tourism income through its two tournaments, but this hinged on the outward presentation among its players/guests of refined gentility—a reflection of both class and gender—both on and off the court. This article considers how lawn tennis tournaments fit into the town’s burgeoning tourism industry, and examines gender relations—particularly the role of women—in relation to this development.

The growth of Drosera intermedia in nutrient-rich habitats: the role of insectivory and interspecific competition

1985 ◽  
Vol 63 (12) ◽  
pp. 2468-2469 ◽  
Author(s):  
Scott D. Wilson
Keyword(s):  
Interspecific Competition ◽  
Field Experiments ◽  
Lake Ontario ◽  
Organic Content ◽  
Dense Vegetation ◽  
Nylon Mesh ◽  
Sediment Organic Content ◽  
High Sediment

This study used field experiments to test whether insectivory confers any benefit on Drosera intermedia Hayne growing on lakeshores characterized by high sediment organic content and dense vegetation. Ramets were grown in pots containing organic shoreline sediment for one summer at Axe Lake, Ontario. Insect availability was controlled by nylon mesh. Biomass accumulated by D. intermedia was not affected by insect availability. In a second experiment, when D. intermedia was grown with ramets of Lysimachia terrestris (L.) BSP., the exclusion of insects significantly reduced the biomass accumulated by D. intermedia. These results suggest that insectivory may be important in reducing the effect of interspecific competition on D. intermedia growing in nutrient-rich habitats.

Role of ingestion route in the perfluoroalkyl substance bioaccumulation by Chironomus plumosus larvae in sediments amended with carbonaceous materials

2016 ◽  
Vol 302 ◽  
pp. 404-414 ◽  
Author(s):  
Yawei Zhai ◽  
Xinghui Xia ◽  
Xiuli Zhao ◽  
Haiyang Dong ◽  
Baotong Zhu ◽  
...  
Keyword(s):  
Carbonaceous Materials ◽  
Chironomus Plumosus
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