There was definitely a noticeable decrease in the amount and diversity of microorganisms observed this last observation. The decrease has been gradual since the consumption of the beta food pellet. Throughout my microaquarium there were multiple rotifers, amoeba, and the rectangular segmented diatoms, but mostly such microorganisms were gathered in close proximity to the Utricularia gibba. The observations became more interesting towards the soil. As has been observed the past couple of weeks, there were thousands of bacteria, but unlike past weeks I came across some kind of “track” of an unknown organism, Mr. McFarland and I determined it matched neither an insect larvae or amoeba. Determined from the feathery-appendaged tracks, the organism was moving left. The picture to the left above shows the tracks. Also towards the soil I ran across multiple Centropyxis, which are amoeba-related microorganisms that are a member of the genus Flugia and have a brown round body with a aperture near the anterior and a finger like appendage that is retractable (Patterson 1996). The Centropyxis is shown above in the picture to the right (Patterson 1996). Also towards the soil there were dead microorganisms, a Cosmarium desmid and rotifer being fed upon by bacteria.
Citation:
Patterson D. 1996. Free- Living Freshwater Protozoa. London: Manson Publishing Ltd. Fig. 184.
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