Massif des monts Sutton BioKit: invasive species

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Invasive exotic species are a huge threat to biodiversity. Often introduced both accidentally and intentionally by humans, they endanger the survival of indigenous species because they tend to crowd them out. Competition is fierce!

On your way back, keep an eye out for invasive species!

Japanese knotweed

Japanese knotweed. Photo: © City of Montréal

Also known as Mexican bamboo, this plant was introduced in North America at the end of the 1800s as an ornamental plant. In addition to growing very rapidly, it releases a toxin in the soil which prevents the growth of other plants. It is invading the banks of the Sutton River near the village at an alarming rate.

Emerald ash borer

Emerald ash borer. Photo: © Klaus Bolte, CFS-SCF, NRCan-RNCan

The larva from this small insect, a native of Asia, feeds on ash wood. Present in Quebec since 2008, it causes major damage along its path. If you notice this insect, a general yellowing of the leaves or D shaped marks on the trunk of an ash tree, please contact the Canadian Food Inspection Agency at 1-866-463-6017.

Eco-friendly tip

To prevent the spread of wood-boring insects, avoid transporting firewood from one region to another.
Glossy buckthorn. Photo: © Leslie J. Mehrhoff, University of Connecticut,
only when it is permitted.

Glossy buckthorn

This plant comes from Europe, western Asia and North Africa. It invades mostly wetlands. It is rarely attacked by pests, and the deep shadow created by its foliage hinders the growth of indigenous species.


  • Ecosystem: System consisting of living organisms and their physical environment in interaction.
  • Exotic species: A species not native to the environment in which it lives.
  • Food chain: Succession of living organisms that feed off one another in a predetermined order.
  • Habitat: Natural living environment of an animal or plant species.
  • Headwater lake: High-altitude lake whose water flows into a river or another lake.
  • Indigenous species: A species that lives or grows naturally in a region without having been introduced there.
  • Pollinator: Animal, such as a bee, butterfly, hummingbird or bat that transfers pollen from one flower to another.
  • Spore: Reproductive element of mushrooms, algae and certain plants such as ferns.
  • Temporary pond: Small, shallow body of water that dries out in the summer.
  • Wetland: Land submerged under water, temporarily or permanently, and characterized by the presence of plants adapted to water-saturated soils.

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