Population Sampling

Question 1

What is used to study the distribution of SMALL organisms?

Answer 1

Quadrats

Question 2

How to estimate the number of organisms in several quadrats?

Answer 2

1) Count how many quadrats there is (5)
2) Count all the organisms in 3/4 quadrats (3,4,7,6)
3) Work out the mean:
Total number of organisms (20)
DIVIDED BY
Number of quadrats (5)
= estimation of organisms per quadrat (4)

Question 3

What can be used to study the distribution of organisms along a LINE?

Answer 3

Transects

Question 4

Why would you want to use a transact?

Answer 4

To see if the organism is more/lesson common as you move in a certain direction.

Question 5

How do you use a transect?

Answer 5

1) Mark out the line however long you like.

2) Collect the data along the line - do this by counting the organisms you’re interested in that are touching the line.

Question 6

5 environmental factors that determine where organisms live?

Answer 6

Temperature 
Water availability
Oxygen & CO2 availability 
Amount of light 
Availability of nutrients