Stop Starry Stonewort

Starting in 2021, the Stop Starry Stonewort program has worked to install free-to-use Clean Drain, Dry, Dispose (CD3) solar powered cleaning stations on lakes where preventing spread of starry stonewort is crucial for protecting and preserving the statewide aquatic ecosystems.

These stations remove 95% of aquatic plant surrogates from boats, trailers, and gear in just a few minutes of cleaning and are equipped with a QR code to a free Check-In–Check-Out Tool which guides users through each step of cleaning to help boaters comply with Minnesota invasive species transport laws.

Stop Starry Stonewort CD3 station map

Funding provided by the Environment and Natural Resources Trust Fund.

Environment and Natural Resources Trust Fund logo




Monitor for starry stonewort in your lake

In August of every year, the Minnesota Aquatic Invasive Species Research Center hosts a statewide monitoring event called Starry Trek. Click here to register.

Participate in our Stop Starry Stonewort Collaborative

This program is developed, implemented, and evaluated by professionals and citizens who monitor, prevent, and manage aquatic invasive species in Minnesota. Contact Sami Selter (sami@mnlakesandrivers.org) with interest in participating in our collaborative discussions.

Watch these videos to learn more about stopping the spread of starry stonewort
Read research about starry stonewort

Evaluation of a decade of management of a North American aquatic invasive species (Nitellopsis obtusa) highlights scale-dependent effectiveness and monitoring gaps (2025)

A within-lake occupancy model for starry stonewort, Nitellopsis obtusa, to support early detection and monitoring (2024)

Invasive Nitellopsis obtusa (starry stonewort) has distinct late-season phenology compared to native and other invasive macrophytes in Minnesota, USA (2022)

Biology, ecology, and management of starry stonewort (Nitellopsis obtusa; Characeae): A Red-listed Eurasian green alga invasive in North America (2018)

Response of the invasive alga starry stonewort (Nitellopsis obtusa) to control efforts in a Minnesota lake (2018)

Prediction of starry stonewort (Nitellopsis obtusa) invasion risk in upper Midwest (USA) lakes using ecological niche models (2018)


ENTRF Grant Manager: Jeff Forester (jeff@mnlakesandrivers.org)
ENTRF Grant Administrator: Tim Ward (tim@mnlakesandrivers.org)