Sunday, November 18, 2007

Observation 4


Observations: Water has evaporated to below half of original water line.
Diatoms greatly increased. They were once found only arounf the rim of the aquarium, now dispersed all around the aquarium.
Shrimp seeds once again increase dramatically since last week. Many carcasses found, and immature shrimp seeds were also observed.
Unknown cyanobacteria identified as Scytonema. Scytonema have greatly increased as well. New cyanobacteria also found, thought to be Nostoc.
Some roterifers, Epiphaner, also abundant.
Four acolosoma were observed bundled together in dense moss growth

Comments/questions: A large increase in the amount of life must be due to the food pellet added to the aquarium. Water line decrease is due to the lid being off of the aquarium, allowing evaporation to occur more rapidly. My biggest question is about the four acolosoma seen grouped together. What were they doing? My first thought is that they were mating, but it was suggested to me that they were huddled around a food source and having a group "dinner". Maybe they were just lonely....... i'd say the life of a microscopic water worm is normally "single celled" haha! get it? classic.....

Sunday, November 11, 2007

Post 3











Decay seems reversed in the the moss, some regeneration has occurred. Several large and small air bubbles surround the moss, a sign of photosynthesis and gas exchange.
Worm like organisms identified: Aeolosomatidae, an annelid. Only two spotted in comparison to last time when there were several swimming around.
Dramatic increase in seed shrimp
Undetermined branching cyanobacteria observed
Diatoms present around the edges of the microaquarium

Questions: The moss seems more transparent and seed shrimp are often seen around it. Are they eating the moss? Is the source of energy the reason they have increased in numbers while the annelids have declined?