Thursday 16 August 2018

Recognizing Blue-green Algae or Cyanobacteria


A message from Madeleine Palmser, who regularly patrols our lake's shoreline in search of cyanobacterium:

When we did the water testing several people asked about identifying cyanobacteria aka blue-green algae.  Here is a pix of a colony from the bay behind Green Mountain.  As well as this tubular form, one can also find ball/globes attached to branches of sunken trees.  And sometimes a section will break off and float on the surface.

N.B. There is no need to worry.  As of last year, cyanobacteria concentrations were way below toxic levels.   We are testing the most concentrated area again this summer (in Long/Woods Bay), and will report back as soon as we have the figures.  



For those who wish to know what the devilish stuff looks like, Madeleine has provided this photo of a milky-green cloud of cyanobacteria for your edification.

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