4.2 Quadrats

4.2 Recall the use of Quadrats to estimate the population size of an organism of 2 different areas.

• Quadrats are based on squares.
• Squares can be made of any material including wood, string and metal.
• Quadrat is used to sample the area and count the
  number of individuals inside the grid.
• This is an estimate of the population size.
• Quadrats are a method of sampling so that populations can be compared
  in the different locations.