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Biology April Jane Alarcon Title: Investigation of factors affecting the distribution of Chironomus larvae in Nant Iago (James' Stream) Nr. Abergavenny, S. Wales. Method: Biotic Data 1. The stream was split into 14 sections and groups of 3 were each assigned to work at different sections of the stream, which began at the beginning, right at the top, and ended further down stream. 2. The method we used for our experiment was Disturbance Sampling. This was accomplished with the aid of a Surber Sampler which we used in one riffle and one pool in our section. The Surber Sampler consisted of a net which had a 1.0mm2 mesh at the end where all the samples were collected and a quadrat which was placed over a part of the riffle or pool and gave us our area of sampling. 3. By laying the quadrat flat on the bed, I disturbed the stream bed and washed any lying...

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