Not all exotic species are a threat. However, some can cause significant ecological, economic or environmental damage. They are referred to as “invasive.”

Up until now, the only exotic invasive species that has been found in La Mauricie National Park is Japanese knotweed (Reynoutria japonica var. japonica, syn. Fallopia japonica). This perennial plant, also known as Japanese bamboo, has almost no enemies and reproduces very easily. Its underground stems release toxins that prevent other plants from taking root. Getting rid of this species is particularly difficult and can take several years.

Some other exotic invasive species, although not currently found in the park, are on the radar of our teams:

  • Eurasian watermilfoil
  • Common water reed (ditch reed)
  • Emerald ash borer
  • Spiny water flea
  • Rainbow trout
  • Zebra mussel

What you can do to help protect La Mauricie National Park from exotic invasive species

  • Clean your equipment, particularly your boat. Inspect and clean your gear and footwear to remove all seeds, mud and plant matter before and after visiting the park.
  • Stay on the trail to avoid spreading seeds and trampling on native plants.
  • Do not bring wood with you that is from outside the park. Only use the firewood sold on-site.

Preventing Eurasian watermilfoil invasion

Eurasian watermilfoil specimen, exotic invasive alga

The Eurasian watermilfoil has not yet been detected in the park’s lakes, but there is a real risk of colonization. This particularly invasive aquatic plant is found in the Mauricie region and elsewhere in Quebec.

As a precautionary measure, it is prohibited

  • to use a motorboat (gas or electric).
  • to use a trailer to launch your boat.
  • for park employees, researchers and contractors to use boats other than those provided by Parks Canada.

Parks Canada is committed to prevention and raising awareness among its employees and visitors in order to keep La Mauricie National Park’s bodies of water free of Eurasian watermilfoil.


Logo 50e anniversaire du Parc national de la Mauricie - La Mauricie ntional park 50th anniversary logo
Logo 50e anniversaire du Parc national de la Mauricie - La Mauricie ntional park 50th anniversary logo