Quadrats

• Describe how to use a quadrat

  1. Place a 1m2 quadrat on the ground at a random point within the first sample area. You can divide the the area into a grid and use a random number generator to pick coordinates.
  2. Count all the organisms within the quadrat
  3. Repeat these steps
  4. Calculate a mean
  5. Repeat these steps in the second sample area
  6. Compare the means
• How can the population be calculated

  1. Find the mean number of organisms per m2.
  2. Multiply the mean by the total area