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These photos were taken
at the second stream monitoring workshop in late August 2002, in Madison Park,
Trotwood, Ohio.
Volunteers learn how to evaluate the physical habitat of the
stream in terms of channel shape, rock sizes, and other factors.
Using a kick seine net, we learn to collect
and identify the larvae of insects living in the stream bed; they are indicators
of the long term health of the stream.

Measuring the pH in the stream is one of six
chemical tests that are conducted to give a "snapshot in time" of the
water chemistry. pH measures how acidic or alkaline the water is; organisms can
live only in a narrow pH range.
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