sampling techniques

Question 1

what are the 3 types of sampling techniques used to sample plants and animals?

Answer 1

pitfall traps,quadrats and paired statement keys

Question 2

why are pitfall traps used?

Answer 2

they can be used to sample living organisms that live on the ground eg beetle,spiders and slugs

Question 3

how can you make the samples from a pitfall trap relable and valid?

Answer 3

1.samples must be the same size
2.samples must be taken at random
3.many samples must be take to allow an average to be calculated

Question 4

how do you set a pitfall trap up correclty?

Answer 4

1.make are the top of the pot is level with the soil

2.add drainage holes to the bottom of the pot to allow water to drain

3.cover the trap with leaves or bark to camouflage it

4.check the trap regularaly to ensure that organisms havent escaped or been eaten

Question 5

why are quadrats used?

Answer 5

to sample plants and slow moving organisms

Question 6

how to use a quadrat?

Answer 6

1.they should be placed randomly so that a representative sample is taken

2.many should be placed so that a representative sample can be taken

Question 7

what is a paired statement key?

Answer 7

siceintists often use these to identify one organism from another.it is a simple series of questions which are asked about the organisms which helps thwm come to a conclusuon of what the orgasim is