Week Seven
October 22, 2013
*Note: This observation is one day later than usual because our class spent Monday at the Texas Memorial Museum for a field trip!
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Water: The water in our ecosystem is still clear. The water level seems a bit lower, but there is still quite a bit of condensation in the system, and that could explain why the level has gone down.
Elodea: The elodea is still floating in the water. The newest elodea spring still looks very healthy. The leaves are long and the plant is a very vivid green. The roots that appeared last week have successfully anchored the plant down into the gravel.
Snails: Both snails are stuck to the bottle (which is good news since we thought one might be dead). We could actually see the snails' antennae moving for the first time. The snails are both suctioned on well and they appear healthy.
Daphnia: The daphnia are still not visible, although any time the ecosystem bottle is moved, you can see tons of daphnia exoskeletons swirling around. That said, we haven't seen live daphnia since the second week.
Seeds/Leaves: About 80% of our leaves have turned yellow. The plants themselves are very spindly looking and they appear frail. We suspect this is linked to a nitrogen deficiency as mentioned in an earlier post.
Soil: The roots of the bean plants are still visible in the soil. There are roots that are now poking out of the top of the soil.
Water: The water in our ecosystem is still clear. The water level seems a bit lower, but there is still quite a bit of condensation in the system, and that could explain why the level has gone down.
Elodea: The elodea is still floating in the water. The newest elodea spring still looks very healthy. The leaves are long and the plant is a very vivid green. The roots that appeared last week have successfully anchored the plant down into the gravel.
Snails: Both snails are stuck to the bottle (which is good news since we thought one might be dead). We could actually see the snails' antennae moving for the first time. The snails are both suctioned on well and they appear healthy.
Daphnia: The daphnia are still not visible, although any time the ecosystem bottle is moved, you can see tons of daphnia exoskeletons swirling around. That said, we haven't seen live daphnia since the second week.
Seeds/Leaves: About 80% of our leaves have turned yellow. The plants themselves are very spindly looking and they appear frail. We suspect this is linked to a nitrogen deficiency as mentioned in an earlier post.
Soil: The roots of the bean plants are still visible in the soil. There are roots that are now poking out of the top of the soil.
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