Invasive aquatic species pose a significant threat to the ecological balance of Lake Achigan.

 

Accidentally introduced or transported by boats, these species spread rapidly and can dominate

natural habitats to the detriment of native flora.

 

A growing problem

Some exotic plants, such as Eurasian watermilfoil, find favorable conditions for their growth in the lake: calm water, the presence of nutrients, and high summer temperatures.

Once established, they form dense beds that are difficult to eradicate.

 

Their spread is often linked to human activities, including:

• Contaminated boats and nautical equipment;

• The transport of plant fragments;

• Uncleaned boat launches;

• Travel between different bodies of water.

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Impacts on the Ecosystem and Uses

The presence of invasive plants leads to several negative consequences:

• Reduction of aquatic biodiversity;

• Modification of fish and invertebrate habitats;

• Decreased oxygen levels in the water;

• Degradation of the landscape;

• Obstruction to swimming, boating, and fishing.

In the long term, these species can profoundly alter the natural functioning of the lake.

 

Prevention and Responsible Actions

Prevention remains the most effective way to limit the introduction and spread of invasive plants.

 

Every lake user can contribute by adopting the following best practices:

• Thoroughly clean boats, motors, and trailers;

• Remove all plants before launching;

• Drain water from watercraft on land;

• Avoid moving plants from one body of water to another;

• Report any suspicious presence to the APLA.

These simple actions play a key role in protecting the environment.

 

The Role of APLA

APLA monitors the environment, raises awareness among local residents, and collaborates with authorities

and regional partners to prevent the arrival and spread of invasive plants.

Through collective action, it is possible to preserve the health of the lake and the richness of its ecosystems.