© 2007 EPTB/COVABAR/Université de La Rochelle
The water chestnut is an intrusive plant, which was detected for the first time in Quebec in 1997. Indeed, this water plant hasstarted by invading the south river, a tributary of the river Richelieu and is developing in all the streams of region.
It is a plant native of Europe, Asia and Africa, that is presumed to have been introduced in North America at the end of the 19th century. One it used as house plant for ponds and private water spots. Then in the 1940s, the water chestnut settled down in the Lake Champlain.
This plant is considered as intrusive and harmful for the aquatic environment because it reproduces at a lightning speed. Indeed, every seed of water chestnut produces approximately twelve "bows" which, in turn, can produce about twenty seeds!
So, it suffocates the fauna and the native flora and can consequently provoke their disappearance. The proliferation of this plant also impedes fishing, navigation and hunting.
One of the priorities of the Quebec government is to prevent the proliferation of the water chestnut. The Ministry of the Environment has gathered several partners to fight against this intrusive plant. The organism « Canards Illimités », the Centre d’interprétation du milieu écologique du Haut-Richelieu, Canada Environment, the MRC du Haut-Richelieu, the Société de la faune et des parcs du Québec thus work in close collaboration.
So, in 2001, a campaign of manual lifting of the water chestnut was scheduled at instigation of the Committee of the partners of the water chestnut.
Flora River Richelieu
Intrusive vegetal species