Water Chemistry and Chlorophyll a in North Central Ontario Lakes, 1979-Present

Fisheries and Oceans Canada's program summarizes long-term water chemistry and chlorophyll a monitoring in north central Ontario lakes. The data, centered on the Turkey Lakes Watershed since 1979 and including networks around Sault Ste. Marie and Parry Sound, tracks lake acidification and ecological recovery. Measurements quantify acid–base status, major ions, nutrients, trace metals, and phytoplankton biomass to link atmospheric deposition to aquatic responses.

Use Cases

• Modeling lake sensitivity to acidification based on water chemistry measurements.
• Tracking long-term chemical recovery following emission controls using time-series data.
• Assessing phytoplankton biomass and lake productivity based on chlorophyll a measurements.
• Analyzing episodic stress events, such as spring snowmelt, on lake chemistry.
• Conducting regional assessments of lake ecological condition across a heterogeneous landscape.

Strengths

• Long-term monitoring data centered on a specific watershed since 1979.
• Integrates data from multiple lake networks around Sault Ste. Marie and Parry Sound.
• Coordinated datasets support both detailed process studies and regional assessments.
• Includes biological context via chlorophyll a measurements alongside chemical data.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to the specific monitored regions of Ontario.

Provenance

Source

Fisheries and Oceans Canada

Collection Method

Long-term monitoring program under Canada’s Long Range Transport of Air Pollutants (LRTAP) initiative.

Time Range

Since 1979

Freshness

Last updated 2026-06-02 21:00:50.490074; freshness should be verified.

Geography

North central Ontario lakes, centered on Turkey Lakes Watershed, with networks around Sault Ste. Marie and Parry Sound.