Invasive species
BUCKTHORN
During a walk, it’s very likely you have come across several buckthorn bushes without realizing it. It is one of the invasive exotic plants found all over the Island of Montréal, and is the primary threat to our ecosystems.
Two types of invasive buckthorn are found in Montréal, common buckthorn (Rhamnus cathartica) and glossy buckthorn (Frangula alnus). They were introduced from Europe in the early 1900s when they were planted around homes because of their decorative appearance. They are also present in various other sites, such as forests, the edge zone of woods, along fences and trails, and in old, abandoned farm fields. Buckthorn is diecious, meaning that some plants bear male flowers and others, female. The female plants produce a great number of small fruits.
Buckthorns are hardy in a wide range of light and moisture conditions. Proliferation is due to their abundant seed production; the seeds are unusual in that they remain viable for several years and can germinate rapidly. Birds help spread buckthorns widely because they disperse the seeds after eating the fruit.
When buckthorn invades a natural setting, it replaces native species thanks to the thick shade provided by its leaves and because its branches grow very close to the ground. In addition, this species can be allelopathic, meaning it can produce substances that inhibit the growth and development of herbaceous plants nearby. Once established, buckthorn prevents natural regeneration and creates significant impacts on biodiversity. It is the primary threat to the ecosystems of our large parks. That is why it is important to remove them from your property.
COMMON REED
The common reed, or Phragmite (Phragmites australis), is a plant that likes wetlands, it is very invasive. It can often be seen in ditches along autoroutes.
GIANT HOGWEED
The Giant hogweed (Heracleum mantegazzianum), (berce du Caucase in French) has not yet appeared in Baie D’Urfé but it is gaining ground and represents an important public health threat.
INVASIVE EXOTIC INSECTS
We have already met the Emerald Ash Borer, while the Asian long-horned beetle is being closely monitored. These two exotic insects pose serious threats to Montréal’s urban forest. As of now, the Asian long-horned beetle has not been found in Québec.
INVASIVE EXOTIC SPECIES IN CANADA
TOWN HALL
20410 Lakeshore Road
Baie-D’Urfé, Qc
H9X 1P7
Tel. : 514 457-5324
info@baie-durfe.qc.ca
