What are these two attached pictures of ?Closterium?

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Kimberly L Schulz

Hi Paul! That's interesting. I haven't seen that before. I agree it looks like a desmid, possibly Closterium...could it have a pathogen? (hope all is well!)

Paul V Zimba

Hi Kim- About 40% of the bloom is in this shape. We have preserved samples to look for pathogenic bacteria/viruses-neat idea. Best, PZ

Hedy J. Kling

Hi Paul They are Closterium and the first 2 look likely they are dying and the upper part of 19 looks normal.. the other 1/2 looks like it is starting to die..Are these pics from preserved material or are they from live. Look like chloroplasts in dying cells.