Cyanobacteria Around Bear Island

[rhubarbpie]

Originally Posted by ApS

Your neighbor may be referring to the precursor to cyanobacteria "poisonous blue-green algae blooms", which are the gloeotrichia. Those are the tiny gray dots that come within easy view of the surface on warm and windless days In late summer.

Just to be clear, gloeotrichia sighting is not a pre-cursor to a blue-green algae bloom. It is it’s own very special variety of Cyanobacteria which in very high concentrations forms a yellowish scum, but otherwise looks like tiny yellow/gray dots suspended at various levels under the water.

The Cyanobacteria spotted at Bear earlier this summer was not gloeotrichia, if I recall correctly, it was one of the more distinctly green varieties.

Sighting map here: https://www.winnipesaukee.org/weekly...oom-watch-map/

Images of Cyanobacteria here: https://www.winnipesaukee.org/wp-con...ance_FINAL.pdf