Invasive Species Management

With invasive pest species, we can’t turn back the clock, the lakes will be altered for good. Not only do invasive species unravel the food web they also fool public perception: The lakes looks cleaner because the food has been stripped out.
— Cameron Davis

Due to increasing concern of invasive aquatic plants spreading from waterbody to waterbody in NH, LSPA started two prevention programs: "weed watchers" in 1999 and boat launch monitors in 2000. In 2001, Variable milfoil, an invasive aquatic plant, was first discovered in Georges Mills, and later in Sunapee Harbor. In both cases, LSPA, with the assistance of NHDES, successfully eradicated the plant. Early detection by volunteers and staff was critical in the outcome.

Today, aquatic invasive plant and animal species continue to spread in the Northeast. LSPA looks for and prevents the spread of aquatic invasive species (AIS) into Lake Sunapee through two programs - the Invasive Watch Program and the Lake Host Program. In addition, LSPA formed an AIS Committee whose purpose is to actively look for ways to effectively prevent invasive species from spreading into Lake Sunapee.

To see which invasive plant and animal species are spreading in the Northeast and to learn more about them, click on the adjacent "Species On The Move" button.

Asian clam survey

In July 2016, we assisted NH DES in a Asian clam survey looking for any signs of these invasive bivalves in the lake. A few native specimens were identified but no Asian clams were found.


Aquatic Invasive Species Prevention Programs


Invasive Watch Program

Volunteers on the lookout

Volunteers on the lookout

The Invasive Watch Program consists of volunteers who are on the lookout for invasive plants or animals in the lake.

Lake Host Program

The purpose of the Lake Host Program is to prevent the spread of aquatic invasive species into Lake Sunapee. There are five public boat launches on Lake Sunapee which are monitored by Lake Hosts over the boating season. Click here to learn more.

Lake Host performing a courtesy boat inspection

Lake Host performing a courtesy boat inspection