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required practicals
RP9 - measure the population size of a common species
Using quadrats
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Created by
Vicky B
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Cards (5)
What is a quadrat?
A
square
frame enclosing a
known
area
what is the first step of comparing how common an organism is in two sample areas?
place a
1m
2
^2
2
quadrat
on the ground at a
random
point within the first sample area
what should you do after placing the quadrat?
count all the
organisms
within the quadrat
what should you do after counting all the organisms?
repeat
the steps as many times as possible - then work out the
mean
number of organisms per
quadrat
within the first sample area
what should you do after calculating the mean in the first sample area?
repeat
the same steps in the second sample area then compare the
means