Distribution of organisms

Question 1

name the five ways that distribution occurs

Answer 1

Temperature, water, oxygen and carbon dioxide, nutrients and light

Question 2

what is a habitat?

Answer 2

A place where organisms live

Question 3

how do you use a quadrat?

Answer 3

1. Place a 1m quadrat on the ground at a random point with the first sample area
2. Count all the organism within the quadrat
3. Repeat step 1-2 as many times as possible and work out a mean (total # of organisms divided by the number of quadrats)
4. Repeat this in a second sample area
5. compare the two means

Question 4

how do you work out the population size?

Answer 4

Mean number of organisms per m2 multiplied by total area of habitat

Question 5

how do you use transects?

Answer 5

1. Mark out a line in the area you want to study using a tape measure
2. Collect data along the line by counting the organisms along the line or using quadrats across the line

Question 6

how do you make the experiment reliable?

Answer 6

1. Take a larger sample size

2. Use random samples