POPULATION DISTRIBUTION AND ABUNDANCE

What type of species can a quadrat not be used for?

• Snails

• Limpets

• Barnacles

• Crabs

• Fish

Ten 1m² quadrats were placed in a 40m² field. On average 2 snails were found in every quadrat. Estimate the population size of the whole field.

• 2

• 10

• 40

• 80

• 20

What is a suitable way to sample plants in a field?

• Counting Random Plants

• Using Quadrats

• Using Pooters

• Using Pitfall traps

Which of the following is true about quadrats?

• quadrats should be placed randomly so that a representative sample is taken

• you should look at the results from several quadrats in an area to reduce the effect of an unusual distribution

• the results are more reliable when you look at the results from many quadrats

• All the above are true

What is the best way to place a quadrat?

• Place it where you like

• Divide the sample area into a grid and use a random number generator to choose a square.

• Throw the quadrat so it's random

• Divide the sample area into a grid and choose a square.

An area of 5m² was sampled using a quadrat to find a total of 10 sunflowers. If the area of the field was 200m² , what is the estimated number of sunflowers in the field?

• 50

• 20

• 40

• 400

A living or once-living organisms in an ecosystem is a

• population
• biotic factor
• abiotic factor
• community

A non-living element in an ecosystem is an

• animal

• abiotic factor

• biotic factor

• organism

What is a Belt Transect?

• A way of sampling a changing habitat

• A way of sampling a non-changing habitat

• A way of keeping up your pants

Biotic factors are factors that relate to ...

• Living things

• Non-living things