It is a bloom of gleotrichia, which is one type of cyanobacteria. It is advisable to avoid the area of the bloom, as without testing it is unknown whether toxins are present from the bloom. Gleotrichia can release a toxin called microcystin, which is a hepato (liver) toxin.
Yes, you can see gleotrichia in the Broads, usually in late August – they look like tiny yellow balls, which one might think are pollen, but it’s not. Excess nutrients coming into the lake (phosphorus) feed the plants, algae, and cyanobacteria. Blooms of algae and cyanobacteria should be avoided, which is why the NH Dept. of Environmental Services issues the warning.
This is one of many reasons that all of us need to work together to reduce the flow of phosphorous into the lake. Even small amounts can have a significant impact.
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The Lake Winnipesaukee Association (LWA) is a non-profit organization dedicated to protecting the water quality and natural resources of Lake Winnipesaukee and its watershed. Through monitoring, education, stewardship, and science guided approaches for lake management, LWA works to ensure Winnipesaukee’s scenic beauty, wildlife habitat, water quality and recreational potential continues to provide enjoyment long into the future.
http://www.winnipesaukee.org/
http://winnipesaukeegateway.org/
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