Ecology: Sampling Organisms.

Question 1

What is random sampling used for?

Answer 1

• Compare the number of organisms in different areas.
• Use quadrats: Count the number of organisms inside the quadrat.
• Used to sample plants or slow moving animals.
• Place randomly.

Question 2

How do we estimate the total population size of species in an area?

Answer 2

• Total Population Size: total area/area sampled x number of organisms of that species counted in the sample.

Question 3

When do we use sampling along a transect?

Answer 3

• Investigate whether the number of species change was we move across the habitat.
• Transect: Line such as tape measure or a rope, place it so it runs across the habitat.

Question 4

How do we use sampling along a transect?

Answer 4

• Place quadrats to count the number of organisms at intervals on the transect.