Question: How recreational boaters contribute to aquatic invasive species in Montana lakes and rivers

Expert answer

It is estimated that humans introduce thousands of aquatic invasive species (AIS) to new environments every year. Aquatic invasive species are non-native plants, animals, and pathogens that spread into waterways and disrupt the habitats and native species they invade. Many of these introductions occur when recreational boaters move watercraft and equipment between different bodies of water without properly cleaning them first.

Aquatic invasive species can have devastating economic and ecological impacts. In the Great Lakes region, for example, AIS are responsible for an estimated $5 billion in economic damages each year. In Montana, AIS have been found in all major river basins and some of the state's most popular lakes, including Flathead Lake, Canyon Ferry Reservoir, and Bighorn Lake.

Aquatic invasive species are often spread by recreational boaters who move watercraft and equipment between different bodies of water without properly cleaning them first. Boaters can unwittingly transport AIS on their boats, trailers, and gear. Once introduced, these species can quickly spread to new areas and cause significant economic and ecological damage.

To help prevent the spread of aquatic invasive species, Montana has implemented a mandatory boat inspection program. All boats entering Montana waters must be inspected for AIS before launching. Inspectors look for visible signs of AIS and educate boaters about how to clean their boats and equipment to prevent the spread of these harmful species.

The best way to prevent the spread of aquatic invasive species is to clean, drain, and dry your boat and gear after every use. This simple step can go a long way towards protecting Montana's waters from these harmful invaders.