A CIESE Collaborative Project

East Elementary School
Akeny, Iowa

Our Hypothesis: No, the macroinvertebrate life will be different in pond water all over the world.

Reasons for our hypothesis:
1)Because some places are warmer than others, the water temperature might be warmer too. Maybe some macroivertebrates
can survive only in waters of certain temperatures.
2)Some water might be dirtier than other. That might make it so the macroinverteberates cannot live.
3)Maybe some ponds don't have the right kind of food, so some macroinvertebrates might not be able to live there.

How we tested our hypothesis:
1)Our pond water came from the outskirts of our suburban community. We didn't dredge down to the bottom of the pond, but scooped the water
from the top. The water was pretty clear; not murky, but did contain some algae/plant life.
2)We used Proscopes attached to our computers to get close-up views of the pond water life.
3)We found the following: 3 snails
5 water beetles
1 cyclops
6 damselfly nymphs
9 daphnias (water fleas)

4)To connect to this experience, our city's civil/environmental engineer visited our class. She shared information about how the
quality of water influences the type of macroinvertebrate life it can support and brought samples of macroinvertebrates she collected. We
matched the macroinvertebrates we found in our pond water to the identification sheet she brought to help us get an idea of the water
quality that supported the macroinvertebrates from our pond water sample. Additionally, she led us through using test strips to measure
the phosphate and chlorine levels to compare and comtrast our collected pond water to tap water. The testing showed that the tap water had a
higher level of chlorine (and that this would not allow for macroinvertebrates to live), and the pond water had a normal level of
phosphates.



Annette Wilson
2nd Grade
East Elementary