Particle surface as a rich environment
This view shows the rolling locomotion of Synula between particles. The surface of each particle is covered with bacteria and algae. These biofilms offer a rich environment to protozoa and other small organisms.
Commentary by Prof. Yuji Tsukii, Hosei University
A plate-like figure appearing right side of the video is a colony of blue-green algae, Merismopedia.
The particle surfaces are covered with a lot of bacteria and humic substances, but it may not be a developed biofilm in the strict sense.
Sampling Date : 03 July 2009
Sampling Site : Hirose River B Google Map