The students also took temperature readings at two different locations to see if there was a difference between upstream and downstream locations. At picnic tables near the lake, the students ran water chemistry tests on nitrates and phosphates. They also investigated the turbidity and total solids found in the water samples.
In the stream below the lake, the students located their exact longitude and latitude cordinates using two satellites that gave us the readings on handheld monitoring devices.
Several students put on waders and went into the stream. Using seining nets, they collected varoius macro-invertebrates. After identifying the organisms, using various keys, the students calculated the Benthic Macroinvertebrate Tolerance Index which gave the stream a Water Pollution Tolerance score of MEDIUM.
As a final "peek" at the Blair's Valley ecosystem, the students sloshed their way to the site of a beaver dam. It also was a perfect ending for our wetlands fieldtrip.