Sunday, November 2, 2008

Botany lab week 2

Last week my micro aquarium began to slowly die as organisms started decaying. This week a food pill was added to my micro aquarium which caused many organisms to flourish. Green matter appeared to grow back in the dying plants and the the number of heterotrophic organisms increased dramatically. As it was last week, Rotifers were the most numerous organims in the ecosystem, and there were still large numbers of nematoeds. The most diverse organisms were found in the muck at the bottom of the container.
I encountered a vorticella, a common peritrich cilliate which contains wreaths of feeding cillia and an anchoring tail, which hung on the side of the container and filtered matter into its mouth, (Fig. 233 pg 113, Free Living Freshwater Organisms.)
I came upon an amoeba with many pseupodia which extended in all directions trapping engulfing matter which was found floating around the aquarium. After looking this amoeba up in a book I discovered that it is known as Biomyxa. A Biomyxa has thin anastomosing pseudopodia and is very enormous compared to other amoeba, it consumes alot of energy due to the quick rate in which it moves and the numerous pseudopodia which it extends, (Fig. 144, pg. 81 Free Living Freshwater Protozoa.)
The most interesting organism which i found was thrashing around violently in the muck. I descovered that it was a male cyclopoid, a multicellular organism with conspicuous antennae and two red eyespots which are very close together giving it the appearance of having one eye, hence the name, (Fig 95, pg. 204, Guide to Microlife.) As with last weeks observation, this week yielded valueable information in the understanding of my microecosystem

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