Investigating nearshore and offshore patterns of thermocline and deep chlorophyll maxima formation in Lake Ontario

Sturgeon on Cisco June 2021

Continuous monitoring will provide data needed to help protect ecosystems Scientists deployed an autonomous underwater vehicle to continuously collect high-resolution spatial and temporal data in Lake Ontario to better understand key lake processes, including currents, primary productivity, and the distribution of phytoplankton and zooplankton. The vehicle, a Slocum glider, is able to collect data 24

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Tracking more than 30 years of phytoplankton blooms in Lake Winnipeg


Lake Winnipeg —one of North America’s Great Lakes — recently has been labeled one of the most threatened lakes in the world because of increased phytoplankton productivity. Many stressors are triggering these alterations in phytoplankton productivity, including climate change. But to separate climate change from natural variability is challenging and requires a large data set

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Understanding the distribution and presence of different cyanotoxins in Ontario waters

Cyanobacteria algae

Cyanobacteria, algae that form on the surface of nutrient-rich waters, can produce an array of toxins. Accurately measuring these toxins in waterbodies is crucial because they can pose risks to human health and other biological communities. Unfortunately, monitoring and research of these toxins has focused almost exclusively on one particular compound—microcystins. Cyanobacteria, however, can also

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Atlantic salmon restoration in Lake Ontario

Atlantic salmon in a swim tank`

Atlantic salmon were historically abundant in Lake Ontario, but their populations disappeared from the lake more than a century ago. Management agencies and conservation groups have made restoring Atlantic salmon in Lake Ontario a top priority. This project will investigate two key factors that may affect the success of these programs – a high thiamine

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Evaluating Microbial Nutrient Sediment Dynamics in Lake Erie Watersheds

Evaluating Microbial Nutrient Sediment Dynamics in Lake Erie Watersheds

A primary goal of water quality managers is to intercept or mitigate nutrients or pathogens at their source to ensure effective wastewater treatment. Source water treatment includes building onsite treatment systems and implementing agricultural best practice for crops. To ensure mitigation is working, managers often monitor nutrients and pathogens in water. These contaminants, however, can

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Investigating Fish Connectivity in the Rideau Canal Waterway to Inform Conservation Decisions

Bergman collecting LOTEK receivers

By: Jordanna N. Bergman, PhD Student, Carleton University and Steven J. Cooke, Professor, Carleton University The Rideau Canal Waterway, located in eastern Ontario, forms a continuous 202-km route between Lake Ontario and the Ottawa River and is connected by 23 working lockstations. Construction of this waterway connected previously disconnected aquatic habitats, allowing both invasive and

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Evaluating stationary hydroacoustics for determining fish movement and abundance

Evaluating stationary acoustics

Little is known about the large-scale movement patterns of Great Lakes fishes. Though it is understood that large migrations of fish typically occur along regions of Lake Superior during spawning events, the timing and potential drivers of these events are not well understood. Better understanding the timing and drivers of these events is important for more effective management of these fisheries. …

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Black Bay Walleye Acoustic Telemetry

Black Bay Walleye Ice Fishing

Located on the north shore of Lake Superior, Black Bay historically supported a robust commercial and recreational fishery for walleye (Sander vitreus). Unfortunately, the walleye population rapidly declined in the 1960s because of a combination of habitat loss and commercial over-fishing. In response, managers closed the fishery in the northern part of Black Bay to allow the population to recover. …

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Using the REASON (River Environment And Sensor Observation Network) Project to Support Adaptive Management of the Saint Lawrence River

Aerial view of Moses Saunders Power Dam

A regional water problem is the paucity of data to support policy decisions on water quality in the International Section of the St. Lawrence River. One cost-effective method to alleviate this information gap is to use remote continuous observation water quality sensor arrays. A novel application that we have developed is the installation of sensor arrays in a hydropower dam wherein …

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    Great Lakes Institute for Environmental Research
    University of Windsor
    2990 Riverside Drive West
    Windsor, Ontario, N9C 1A2