Latest Species on the Move in New Hampshire

Curly-leaf Pondweed found in lake sunapee recently was removed quickly

On Wednesday, June 5, two divers hand-pulled all curly-leaf pondweed plants found by the boat ramp in Georges Mills. They extracted about 15 plants total and feel confident that they got it all. LSPA staff and Invasive Watch volunteers will continue to monitor the lake for any signs of curly-leaf pondweed or other aquatic invasive species.

Click here to read more.

Spiny Water Flea now in NH

Spiny water flea (Bythotrephes longimanus), which is actually a crustacean and not an insect, was discovered in the deepest spot of Lake Winnipesaukee in mid-September. Unfortunately, there is no known treatment so the best thing is to prevent it from entering a waterbody in the first place by cleaning, draining and drying boats, trailers and all gear. As with other aquatic invasive species, spiny water flea can negatively affect the aquatic food web by changing the natural communities and outcompeting native zooplankton species which in turn impacts the fish populations as well.

Click here to read more from the Laconia Daily Sun.

Aquatic Invasive Species

Click on the links below for more information about these invasive plant and animal species. The species with an asterisk by the name pose the greatest threat(s) in the Sunapee Region.

Plants

*Curly-Leaf Pondweed (Potamogeton crispis)

*Variable Milfoil (Myriophyllum heterophyllum)

*Hydrilla (Hydrilla verticillata)

Eurasian watermilfoil (Myriophyllum spicatum)

Brittle Naiad (Najas minor)

Water Chestnut (Trapa natans)

Fanwort (Cabomba caroliniana)

*Purple Loosestrife (Lythrum salicaria)

*Common Reed

Animals

*Spiny Water Flea (Bythotrephes longimanus)

*Asian Clam (Corbicula fluminea)

*Chinese Mystery Snail (Cipangopaludina chinensis)

Zebra Mussel (Dreissena polymorpha)

Click here for additional information about Aquatic Invasive Species in New Hampshire.

To see a map showing how different species have spread over time, click here.