This week, we observed several changes in our ecosystem. There is now condensation on the inside top of the bottle and on the inside bottom of the tier of the bottle that was facing the window. In prior weeks, we have observed condensation, but it is on the side of the bottle that was facing the not window. The cotton string that connects the top and bottom bottle is emerging above the soil and the string is now a dirty color. In the bottom tier, The elodea is partially sticking out of the water. The part that is under water is still relatively green but the part that is sticking out of the water is browning, with one part sticking to the bottle that looks slimy. The water level has gone down some but is still pretty clear. We see two daphnia swimming around and two snails. In the top tier, the plants are looking healthy but there some sort of white, fuzzy substance growing onto them and the plants itself are sticking to the sides of the bottle. We believe that we have had good growth and life sustainability throughout our ecosystem thus far. Here are several pictures from this week:
We predict that we will continue to have good growth and life sustainability in our ecosystem.
Questions for thought:
We wonder why the condensation is now on the side of the bottle that is facing the window, when in the past, it was only on the side of the bottle that was not facing the window.
Why would the cotton string look dirty now?
Here is the terrarium and you get an overview of our observations from above.
Here you can really get a good view of the condensation that was discussed.
The plants are sticking to the sides of the bottle and appear to be slimy looking.
Here is the string that connects the top bottle to the bottom one.
Our overall ecosystem terrarium on week 5.