There is not much to say for this observation, because there was hardly anything going on in my micro-aquarium on thursday. However, there were a few things, some not very interesting, but I did find (well actually Dr. McFarland found it) a "Loxodes" (figure 280, page 131, Free-Living Freshwater Protozoa). It looked similar to many of the other organisms roaming around, but when I got a closer look, it did appear to be different. I acquired some information on it from one of the books in the room. "The edge that supports the mouth (with extrosomes) is convexly curved. The aboral edge of the body bears warts. A long canal extends from the lateral contractile vacuole and along that edge of the body" (131, Free-Living Freshwater Protozoa).
At the bottom activity has been decreasing since week 3, and this week there was virtually nothing except for a few nematodes and rotifers roaming. However, there were hundreds of diatoms lined up randomly all along the bottom layer between the plants and scum layer.
Plant "A" seemed to have almost all living activity surrounding it. There were countless cilia, and also some nematodes and rotifers. I am not sure why so much of the remaining organisms surrounded plant "A". Possibly because it was the only source of nutrients for the organisms.
Citation:
Patterson, D.J. . Free-Living Freshwater Protozoa. Washington D.C.: Manson Publishing, 2003.
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