"Required Practical 9: Sampling Organisms": Ecology.

Question 1

What is the method for this pratical?

Answer 1

• Students work in groups of 3.
• Place at right angles 2 tape measures. (20m in length).
• In 2 bags are numbers 1 to 20. First student picks a number from the bag and moves to that point on one tape measure.
• Second student selects a number from their bag and moves to that point on the tape measure.
• Third student places a qudrat on the ground at the point where the 2 people are standing.
• Records the number of organism in the quadrat.
• Return to the bag and repeat nine more times for 10 samples.
• THIS IS AN ESTIMATE.

Question 2

How could we make this practical accurate?

Answer 2

• Increase number of quadrats thrown.
• ## Cover greater percentage of the area.

Question 3

What is the method for measuring the effect of a factor on the distrubution of a species?

Answer 3

• Use a transect line.
• Place a tape measure across the habitat.
• ## Use quadrat to investigate number of organisims at 1m intervals along the transect.