Invasive Reeds Threaten Northern Ontario Wildlife

An invasive plant, known as phragmites or common reed, is increasingly establishing itself in northern Ontario, posing a threat to native flora and fauna. Environmental groups are conducting workshops to educate the public on identifying and controlling this aggressive species. Invasive phragmites can form dense stands, outcompeting native plants like cattails and bulrushes, and obstructing wildlife pathways, tragically impacting creatures such as turtles and frogs.

This plant also affects recreational areas by overgrowing shorelines and hampers municipal infrastructure by damaging drainage systems and roads. While more prevalent in southern Ontario, its presence is growing in northern cities including Sudbury, Sault Ste. Marie, Timmins, and Thunder Bay. Sudbury is currently in a phase where control is still feasible.

Distinguishing invasive phragmites from its native counterpart is vital. The invasive variety typically has wider leaves and thicker stems, with a thin brown line where the leaf meets the stem. Native phragmites often displays a reddish stem and a thicker line at the leaf-stem junction. The plant's spread is facilitated by transportation along roads and railways, and it appears to thrive in metal-rich soils common in Sudbury's mining areas.

Active treatment methods, including the use of herbicides, have demonstrated a high success rate in controlling invasive phragmites. While some regrowth may occur, prompt intervention can lead to significant die-off within weeks, offering a critical window to manage its expansion and protect northern Ontario's natural environments.