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.

http://protist.i.hosei.ac.jp/PDB/Im.....

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