
Sunday, November 7, 2010
Week Four Observation
The contents of my Microaquarium closely resemble the state they were in last week in regards to variety of organisms and the shape of the elements within. There is still an overall feeling of messiness compared to the first two weeks and it seems as though the ostracods are thriving in this new environment. The amount of seed shrimp is somewhat overwhelming, and even with the naked eye one can observe their numbers inside my aquarium. Another organism that must be reproducing at an alarming rate is the diatom. The small yellow pellets I described last week have surprisingly grown in number and in size, and the diversity of diatom species is surprising as well. Next week I'll name particular species but there seem to be all varieties: long, green species, small, yellowish-brown species, and small, slender species that seem to even be mobile. One organism that I observed within the Utricularia gibba are flatworms, I only saw two of them and I looked for more but I could not find any others. They were gliding slowly in and around the leaves of the plant. I also saw an amoeba, and it was so small that I could hardly notice it, and I strained to find more but could not. Next week I will try to find numbers on these organisms as well but right now they seem rare. It also appears that the insect larvae from my first couple of observations may be dead. It was always relatively easy to find and I failed to find it this time. The numbers of rotifers look as though they are decreasing, because wherever I was looking last week there were five to ten in my field of view, this time there were not nearly that amount.
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