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The brief is to investigate which ions discharged to the
Weaver are important in changing the fauna and flora
You will be using information obtained from experimental
toxicity testing together with additional information obtained from elsewhere
using the internet.
The limitations of time and resources will limit you to a
consideration of the amphipod crustacean populations sampled from the Weaver
downstream of Northwich and a nearby clean upstream site.
You will be provided with water collected from the same
locations together with supplies of Sodium chloride, Calcium chloride, and
Ammonium chloride.
You need to design a set of experiments to determine the
toxicity of these materials so that you can predict their effects on the two
species of crustacean involved. At the same time you will test sediment samples
from above and below the points of discharge to see if there is any residual
toxicity building up in the environment.
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