Curly-leaf Pondweed in Baptist Pond

Curly-leaf pondweed was recently discovered in Baptist Pond. Residents acted quickly to alert NHDES and LSPA and a plan is in place to address this invasive plant.

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.

See the fact sheets below for more information about these plant and animal species.

Invasive Aquatic Plants

• Brazilian Elodea (Egeria densa)

• Curly-Leaf Pondweed (Potamogeton crispis)

• Eurasian Milfoil (Myriophyllum spicatum)

• Variable Milfoil (Myriophyllum heterophyllum)

• Fanwort (Cabomba caroliniana)

• Hydrilla (Hydrilla verticillata)

• Parrot Feather (Myriophyllum aquaticum)

• Spiny (European or Brittle) Naiad (Najas minor)

• Starry Stonewort (Nitellopsis obtusa)

• Yellow Floating Heart (Nymphoides peltata)

• Water Chestnut (Trapa natans)

• Water Hyacinth (Eichhornia crassipes)

  More information on AIS can be found in the Aquatic Plant & Animal Resources page

USGS ANIMATED MAPS

Click on species name to see how it has spread over time.

Eurasian Milfoil (Myriophyllum spicatum)

Hydrilla (Hydrilla verticillata)

Water chestnut (Trapa natans)

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