Favoritos de sleepybun

Mag. 100x (1,4), 400x (2,3,5)
These 2 colonies (represented by photos 1 & 4 at 100x) contain the most tightly packed celIs that I've ever encountered in Uroglena. It would be interesting to understand the hows and whys of colony expansion/contraction that is derived by simply varying the cell-cell distance.
A linked video shows a forest of outward-facing flagella at the surface of the first colony https://youtu.be/8iWRZakeusE

• A water sample was taken on 11/08/2022, from the shore of Lantern Hill Pond, using a 10µ dip net to enrich for microbes. Air temp. 55°F.

Mag. 400x
Cyanobacteria. Possibly C. turgidis as seen here http://cfb.unh.edu/phycokey/Choices/Cyanobacteria/cyano_colonies/CHROOCOCCUS/Chroococcus_key.html. Unhealthy? (cracks in the protoplasm?)

• A water sample was taken on 10/21/2022, from the shore of one of the impoundments, using a 10µ dip net to enrich for microbes. Air temp. 65°F.