The influence of streams on nearshore water chemistry, Lake Ontario

Makarewicz, Joseph C.; Lewis, Theodore W.; Boyer, Gregory L.; Edwards, William J.

doi:10.1016/j.jglr.2012.02.010

Cited by 45 publications

(20 citation statements)

References 29 publications

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“…Excluding the Niagara River, cumulative P input from lake tributaries was 234% greater than input from wastewater treatment plants and comprised about two thirds of the 1982 Niagara River P load. Thus P input from watersheds was likely the underlying influence on coastal conditions by affecting the timing and extent of nutrient availability and structuring of biological communities (Makarewicz et al, 2012c). Higgins et al (2012) found that P inputs from local watersheds appeared to be the underlying driver for Cladophora biomass spatial variability along the shores.…”

Section: Main Lake Regionmentioning

confidence: 99%

“…While coastal regions have unique physicochemical characteristics, there is exchange with deeper waters, allowing transport of materials (e.g., nutrients and contaminants) and energy that drive the biological processes of the lake (Rao and Schwab, 2007). The effects of parameters like watershed development, wind and wave circulation, water and air temperatures, river discharges (including nutrient inputs), and invasive mussels all require consideration of spatial uniqueness of shoreside, nearshore, and pelagic waters of Lake Ontario (Makarewicz et al, 2012b(Makarewicz et al, , 2012c(Makarewicz et al, , 2012d.…”

Section: Introductionmentioning

confidence: 99%

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The ecological history of Lake Ontario according to phytoplankton

Estepp

Reavie

2015

Journal of Great Lakes Research

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Lake Ontario's condition has fluctuated since European settlement, and our understanding of the linkages between observed ecosystem shifts and stressors is improving. Changes in the physical and chemical environment of the lake due to non-indigenous species, pollution, sedimentation, turbidity, and climate change altered the pelagic primary producers, so algal assessments have been valuable for tracking long-term conditions. We present a chronological account of algal assessments to summarize past and present environmental conditions in Lake Ontario. This review particularly focuses on pelagic, diatom-based assessments as their fossils in sediments have revealed the combined effects of environmental insults and recovery. This review recaps the long-term trends according to three unique regions: Hamilton Harbour, the main lake basin, and the Bay of Quinte. We summarize pre-European impact settlement; eutrophication throughout most of the 20th century; subsequent water quality changes due to nutrient reductions; and filter-feeding dreissenid colonization and contemporary pelagic, shoreline, and embayment impairments. Recent data suggest that although phytoplankton biovolume is stable, species composition has shifted to an increase in densities of spring eutrophic diatoms and summer cyanobacteria. Continued monitoring and evaluation of historical data will assist in understanding and responding to the natural and anthropogenic drivers of Lake Ontario's environmental conditions.

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Section: Main Lake Regionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The ecological history of Lake Ontario according to phytoplankton

Estepp

Reavie

2015

Journal of Great Lakes Research

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“…This nutrient‐rich transition zone routinely had high algal fluorescence and supersaturated oxygen concentrations (Figure S7), suggesting high primary production. River inlets are notable sites for metabolic processing in lakes as these locations receive and process material from the upstream network (Mackay, Jones, Folkard, & Thackeray, ; Makarewicz et al, ; Wynne & Stumpf, ) before it mixes into the lake proper. While this zone made a small overall contribution to CO 2 flux in this large lake, the effect of river inlet habitats on whole lake dynamics could potentially be substantial in other lakes, depending on site‐specific hydrologic and biological conditions.…”

Section: Discussionmentioning

confidence: 99%

Large Spatial and Temporal Variability of Carbon Dioxide and Methane in a Eutrophic Lake

et al. 2019

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Lakes are conduits of greenhouse gases to the atmosphere; however, most efflux estimates for individual lakes are based on extrapolations from a limited number of locations. Within‐lake variability in carbon dioxide (CO2) and methane (CH4) arises from differences in water sources, mixing, atmospheric exchange, and biogeochemical transformations, all of which vary across multiple temporal and spatial scales. We asked, how variable are CO2 and CH4 across the surface of a single lake, how do spatial patterns change seasonally, and how well does the typical sampling location represent the entire lake surface? During the 2016 ice‐free period, we mapped surface water concentrations of CO2 and CH4 approximately weekly in Lake Mendota (USA) and modeled diffusive gas exchange. During stratification, CO2 was generally lower than atmospheric saturation (mean 19.81 μM) and relatively homogenous (mean coefficient of variation 0.12), whereas CH4 was routinely extremely supersaturated (mean 0.29 μM) with greater spatial heterogeneity (mean coefficient of variation 0.65). During fall mixis, concentrations of both gases increased and became more spatially variable, but their spatial arrangements differed. In this system, samples collected from the lake center reasonably well represented the spatially weighted mean CO2 concentration but overestimated annual CO2 efflux by 21%. For CH4, the lake center underestimated annual diffusive efflux by only 8.6% but poorly represented lakewide concentrations and fluxes on any given day. Upscaling from a single site to the whole lake requires consideration of spatial variation to assess lakewide carbon dynamics due to heterogeneity in within‐lake processing, transport to the lake surface, and exchange with the atmosphere.

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“…Larval fish and juvenile fish have been observed to respond to changes in olfactory cue concentrations in marine environments (Lecchini, Miura, Lecellier, Banaigs, & Nakamura, 2014). These cues could have varied greatly within the same nearshore or offshore location depending on wind direction, upwelling or downwelling events during our sampling, and the mixing of water nearshore with output of local streams (Makarewicz, Lewis, Boyer, & Edwards, 2012). Our sampling of water from locations may not have controlled for all changes in these cues due to local weather and hydrodynamic changes.…”

Section: Re Sults and Discussionmentioning

confidence: 99%

Swimming responses of larval and juvenile freshwater fishes to nearshore and offshore water sources

Malinich

Pangle

2018

Ecology of Freshwater Fish

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Dispersal of young fish through wind‐driven currents has a growing research focus in large freshwater lakes; however, the influence of behaviour on such dispersal has not been tested. Fish may orient to different environmental cues and use swimming behaviours to navigate towards or retain their position within important habitats. To examine the ability of larval and juvenile fishes of the Laurentian Great Lakes to perceive and orient to nearshore or offshore habitats, we carried out a series of behavioural trials in a flume in which fish choose between different combinations of nearshore and offshore water, and well water. Water and a natural assemblage of larval and juvenile nearshore fish (Dominant species: white sucker, Catostomus commersonii, and spottail shiners, Notropis hudonius) used in the experiment were collected from northern Lake Michigan near Beaver Island. Results of our study suggest that young fish are capable of distinguishing and responding to different water sources, indicating a potential to orient within their environment, such as through the use of olfactory cues. We did not see a difference in fish response to changing concentrations of water cues, possibly suggesting that the threshold for fish response occurs at lower concentrations than were tested in our experiments. This preliminary study into orientation of Great Lakes fishes demonstrates the capacity of these fish to orient to cues in water sources and indicates the need to consider active movement in future studies of larval dispersal and habitat choice in the large freshwater lakes.

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The influence of streams on nearshore water chemistry, Lake Ontario

Cited by 45 publications

References 29 publications

The ecological history of Lake Ontario according to phytoplankton

The ecological history of Lake Ontario according to phytoplankton

Large Spatial and Temporal Variability of Carbon Dioxide and Methane in a Eutrophic Lake

Swimming responses of larval and juvenile freshwater fishes to nearshore and offshore water sources

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