Method 1)         We investigate the distribution of Benthic invertebrates at the Nant Iago stream, which is near Abergaveng in South Wales; 2)         We measured a 150 m stretch of the stream, each group had a 10 m stretch meter long of stream; 3)         A surber sample was used, the size of the holes in the net was 1 mm2, while the size of the quadrat was 0.1 m2 (this size prevents the invertebrates from passing through the holes, but small particles of …showed first 75 words of 313 total…

…showed last 75 words of 313 total…in the water, then we recorded it; f)         Sediment size by estimating the size and by comparing it with a card given to us with many possible sizes, then we recorded it; g)         T.D.S. by using a probe which we put into the water, then we recorded it; h)         The detritus amount by using a 4 part scale: i)         None - 0% ii)          Some - 1%-29% iii)         Abundant - 30%- 59% iv)         Very Abundant - >60%