"Investigating the distribution of streams invertebrates"

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 …

…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%