Week 4

This week in my container many more stationary organisms have increased all over the tank. Moving organisms increased around the sides, bottom, and where the plants in the middle of the container are. The moving organisms have decreased dramatically in the middle of the tank, so it is now being taken over with stationary organisms. The biggest increase this week has been in diotoms(Picture 3) that have taken up all over the place. Diotoms are stationary organisms that product photosynthesis. Also several Arcella are in different random places throughout the tank, but mainly on or around the plants in the middle of the container or the bottom.I saw maybe two moving organisms out in the middle of the container. The main moving organisms in my container are Rotifers and Protozoa. There are 3 nematodes that move in a snake like way, and they are located along the sides. There are 5 Dieptus (Picture 2) which are located at the bottom corners of the container. The Dieptus have a large middle and then two smaller ends that move like a snake. The Protozoa are along the sides, bottom, and along the green organisms in the middle of the container. In the container only non-green organisms are moving and stationary organisms are green. 

Picture 1 Arcella

Picture 2 Dieptus

Picture 3 Diatoms