Toronto Harbor Plankton and Water Quality Data for Habitat Impairment Assessment

Fisheries and Oceans Canada collected water quality and plankton community observations from multiple georeferenced stations in Toronto Harbor. Data includes physiochemical measurements like temperature and chlorophyll-a, biological metrics for phytoplankton and zooplankton, and microbial community parameters. This dataset supports the evaluation of Beneficial Use Impairments related to plankton degradation and habitat loss.

Use Cases

• Analyze relationships between nutrient levels (total phosphorus, total nitrogen) and phytoplankton biomass (chlorophyll-a) across different habitat ecotypes.
• Model zooplankton community composition using size-structured data (small and large taxa) and abundance metrics against environmental stressors like turbidity.
• Assess spatial patterns in bacterial growth rates and primary productivity using georeferenced station data (latitude, longitude) for different Areas like the Inner Harbor and Embayments.
• Compare seasonal variations in dissolved oxygen and temperature with rotifer and zooplankton biomass data from sampling date and season fields.
• Evaluate habitat quality for fish by correlating zooplankton prey abundance (biomass across taxonomic groups) with ecotype classifications (Inner Harbor, Islands, Habitat Cells).

Strengths

• Includes a complete suite of water quality, microbial, phytoplankton, and zooplankton observations for holistic analysis.
• Data is georeferenced with latitude and longitude, enabling spatial comparisons across multiple habitat ecotypes (Inner Harbor, Islands, Habitat Cells, Embayments).
• Contains rate-based parameters like bacterial growth rates and primary productivity, supporting trophic relationship studies.

Limitations

• Sample size and temporal coverage (specific year range and row count) are not specified in the provided description.
• Findings indicate potential environmental stress and data bias from urban runoff and contamination in areas like the Inner Harbor.
• Biological data may exhibit class imbalance, with noted reductions in zooplankton prey and shifts in community structure.

Provenance

Source

Fisheries and Oceans Canada.

Collection Method

Sampling conducted from multiple georeferenced stations throughout Toronto Harbor, collecting physiochemical and biological measurements.

Freshness

Dataset was last updated on March 24, 2026.

Geography

Toronto Harbor Area of Concern, including specific ecotypes: Inner Harbor, Islands, Habitat Cells, and Embayments.