MO1003:
Plankton
bloom of the Ciliate Spirostomum sp. in garden
pond in late summer, the indevidual cells are clumping together
due to raised oxygen levels after increased photosynthesis from
aquatic plants during a hot sunny day, it has been noted that
microrganisms react quickly to changing gas gradients, and is
possibly an ancient response
that evolved during the mesoproterozoic era.