Lynde Shores Phragmites Control Project

The Lynde Shores Phragmites Control Project is expanding efforts to manage and control invasive Phragmites at Lynde Shores Conservation Area. This fast-spreading plant poses serious threats to two provincially significant coastal wetlands: Lynde Creek Marsh and Cranberry Marsh.

These wetlands are unique ecological landscapes that form part of the largest concentration of coastal wetlands in western Lake Ontario. They provide important ecosystem functions like filtering water, reducing the impacts of climate change, and supporting an incredible diversity of plants and animals. They also offer spaces for people to enjoy nature through hiking, canoeing, fishing, wildlife viewing, and photography.

Phragmites

Unfortunately, invasive Phragmites (Common Reed) is spreading quickly across the Conservation Area. It was first recorded as small patches in Cranberry Marsh between 2017 and 2018 and has now grown to nearly two hectares, with additional populations along Victoria Street and in smaller patches elsewhere within the Conservation Area. Phragmites grows in tall, dense stands that crowd out native plants, reduce biodiversity, damage water quality, and block the marsh views that visitors come here to enjoy. Without action, this invasive plant will continue to degrade the health and beauty of these wetlands.

Central Lake Ontario Conservation Authority (CLOCA) is taking an integrated approach to restore balance at Lynde Shores. Work includes targeted removal of Phragmites through herbicide application and cutting, while also supporting innovative research led by the University of Toronto, which has released biocontrol agents at Cranberry Marsh to test long-term solutions. In partnership with the Region of Durham, efforts are also underway to control roadside Phragmites along Victoria Street, a major corridor that contributes to the plant’s spread into the wetlands. Together, these efforts aim to remove approximately 2.5 hectares of Phragmites across Lynde Shores.

This work will help bring back native plants, improve habitat for fish, turtles, frogs, and birds, restore water quality, and re-open wetland views for visitors. Central Lake Ontario Conservation Authority staff will also be on-site during management days to talk with the public about the project and its importance. Work is expected to be completed by the end of winter 2025.

This project is made possible through funding from the Invasive Species Centre and the Ontario Phragmites Action Program as the administrators of the Invasive Phragmites Control Fund.

By tackling Phragmites now, we are protecting the biodiversity, beauty, and resilience of Lynde Shores — ensuring these wetlands remain vibrant and welcoming for both wildlife and people for generations to come.