Wetland plants of High Park

Aquatic plants, called macrophytes, provide numerous ecosystem services including but not limited to improving water quality, providing habitat, food source (seeds, roots, rhizomes, vegetative growth) for birds and other local fauna, nectar source for pollinators and nutrient cycling.

Wetland Plants at Grenadier Pond. Photo: David Stoneleigh
Wetland Plants at Grenadier Pond. Photo: David Stoneleigh

Macrophytes play an important role in protecting edges and shorelines from erosion as root systems effectively anchor the soil in place while the vegetative growth intercepts energy form waves and currents that would otherwise destabilize shorelines and stream banks. They are highly valuable in wetlands, supplying cover for fish, a substrate for aquatic invertebrates and producing oxygen through photosynthesis.

At High Park, several notable wetland plant species are present including Sweetflag (Acorus calamus), Broad-leaved cattail (Typha latifolia), Common arrowhead (Sagittaria latifolia) and Blue-Flag iris (Iris versicolor). Macrophytes are classified as emergent, submergent or floating.

Cattails. Photo: Karen Yukich
Cattails. Photo: Karen Yukich

For healthy macrophyte populations, High Park users should try to avoid disturbance to the Pond’s edges such as trampling, thereby compacting soils and encouraging colonization of the invasive Phragmites (Phragmites australis).

More plants of High Park's wetlands

Articles, Galleries and Guides

What's New?

Welcome to Our New Website!

By High Park Nature | September 14, 2020
Since the High Park Nature website was first launched in 2010, it has provided a wealth of information about the natural features of High Park. Now we are pleased to…

New Treatment for Buckthorn

By High Park Nature | July 9, 2020
This summer Urban Forestry is partnering in a demonstration trial with BioForest, a forest pest management company, to manage invasive buckthorn shrubs using the bioherbicide Chontrol Peat Paste. The active…

Toronto Star article, January 13, 2020

By High Park Nature | April 5, 2020
“We love High Park for its natural beauty. Will that love be the death of it?” Read the article or The Star Pressreader version

High Park Christmas Bird Count Results

By High Park Nature | December 27, 2019
The most recent High Park Christmas Bird Count was held on Sunday, Dec. 15, 2019 (a very windy day). The High Park route ended up with 43 species, our lowest since…

High Park Stewards Summary 2019

By High Park Nature | December 1, 2019
There were over 280 participants (between 110 individuals coming at least once) who came out to High Park Stewards field restoration events. The average number of Stewards that attended each…








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Wetland Plants

Invasive Plants