Required practical: sampling organisms

• What is the first step in estimating the total population of daisies?

  • Use random sampling
  • Employ a quadrat
  • Count daisies in sampled areas
• What equation is used to estimate the total population size of daisies?

  Total population size = (total area / area sampled) * number counted
• Why is the population estimate considered an estimate?

  Sampling may not represent the whole area
• What should be done if the quadrat throws do not represent the area?

  Increase the number of quadrat throws
• What should be recorded at the start of the transect?

  Number of daisies and light intensity
• How do you measure light intensity in this practical?

  Using a light meter or an app
• What might happen to the number of daisies as you move away from the tree?

  It may increase due to higher light intensity
• What other abiotic factors might affect the number of daisies?

  Water and minerals from the soil