Sampling with Quadrats - GCSE Biology Required Practical

Dr Acton shows you how to estimate population size using random sampling with a quadrat, as well as using it to observe changes in population along a transect.
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00:00 Estimating population - random sampling
01:10 Counting organisms
02:07 Calculating population
02:40 Using a transect
03:50 Analysis - biotic & abiotic factors