Importance of the islands
The group of islands is about five kilometres long, and is a major element in the aquatic environment of this sector. They are home to several rare or endangered plant species, four important fish spawning grounds, and more than sixty species of birds and small mammals.
The archipelago is one of the last natural wetlands in Lake Saint-Louis, with a proven importance to the area’s bio-diversity and to its capacity to filter water. Finally, the archipelago also functions as a natural barrier, preventing the circulation of sediment containing mercury and other heavy metals.