Lake Independence Citizens Association

First detected in the state in 2015, this alga-like plant, native to Eurasia, spreads rapidly, forming dense mats that can choke out native vegetation, disrupt fish habitats, and hinder recreational activities like boating and swimming.

The plant is particularly concerning because of its resilience and ability to spread. Starry Stonewort primarily spreads through the fragmentation of its stems, which can easily hitch a ride on boats, trailers, and other watercraft. Once established, it forms thick, star-shaped bulbils (circled in red in picture above) that give the species its name. These bulbils allow it to survive in the sediment, making it difficult to eradicate.

Efforts to control Starry Stonewort in Minnesota have included chemical treatments and mechanical removal, but these methods have proven only partially effective. The best strategy remains prevention—educating the public to clean, drain, and dry their equipment to prevent the spread from infested lakes to new bodies of water.

With its rapid spread and significant impact on ecosystems, Starry Stonewort represents a serious threat to Minnesota's cherished lakes, making it crucial for continued monitoring and preventive measures.

On August 12th, six members of LICA joined Limnologist Carolyn Dindorf of Bolton & Menk, they surveyed points around the whole lake, sifting through raked up piles of vegetation from the bottom of the lake looking for Starry Stonewort and other AIS. Luckily, they did not find any Starry Stonewort at this time. 

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As of the most recent reports, Starry Stonewort has been confirmed in several lakes within the Twin Cities metro area. Some of the key lakes affected include:

1. Lake Minnetonka (Hennepin County) -  Lake Minnetonka has had confirmed infestations of Starry Stonewort in multiple bays.

2. Medicine Lake (Hennepin County) - Located in Plymouth, this lake has also been identified as having Starry Stonewort.

3. Lake Koronis (Stearns County) - This lake is notable for being one of the first and most severe cases of infestation in Minnesota.

These lakes are closely monitored by state agencies and local conservation groups, and efforts to control the spread of Starry Stonewort continue to be a priority to protect other nearby water bodies. The presence of this invasive species in such prominent lakes highlights the importance of preventive measures, especially for boaters and anglers, to stop further spread.

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Click for DNR Fact Sheet on Starry Stonewort

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