Scale a Sample Density Carefully - Practice 1

5 questions0m 0s

Learn the skill

Estimate abundance by dividing counted organisms by sampled area, then multiplying by total comparable area. This assumes the sample represents the larger area. Label the result an estimate, not a census. These data are fictional.

Worked example

A 2 m^2 sample contains 6 plants, or 3 per m^2. At that estimated density, 10 m^2 would contain about 30 plants.

Question 1 Fictional representative sample: 4 plants in 2 m^2. Using that density, estimate the plant count across 12 m^2. Answer

Question 2 Fictional representative sample: 6 plants in 2 m^2. Using that density, estimate the plant count across 12 m^2. Answer

Question 3 Fictional representative sample: 8 plants in 2 m^2. Using that density, estimate the plant count across 12 m^2. Answer

Question 4 Fictional representative sample: 10 plants in 2 m^2. Using that density, estimate the plant count across 12 m^2. Answer

Question 5 Fictional representative sample: 12 plants in 2 m^2. Using that density, estimate the plant count across 12 m^2. Answer