# AQA Biology Question (need help!)

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#1
When using a transect to measure the distribution of an organism, can you count the number of organisms that touch the tape measure? If so, how does that give you the distribution as some of the organisms will be missed (if they are too short to touch the tape measure)?
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4 years ago
#2
(Original post by haseeb_jarral786)
When using a transect to measure the distribution of an organism, can you count the number of organisms that touch the tape measure? If so, how does that give you the distribution as some of the organisms will be missed (if they are too short to touch the tape measure)?
nope, the organisms must be inside the quadrat in order to counted - to find out either the the percentage coverage of plants or the population of a species in a specified location hence, the use of the transect lines.
1
4 years ago
#3
If half or more of the organism is touching/within the area of the transect/ quadrat can it be counted then?
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4 years ago
#4
(Original post by lmaooome)
nope, the organisms must be inside the quadrat in order to counted - to find out either the the percentage coverage of plants or the population of a species in a specified location hence, the use of the transect lines.
Actually you can decide before your experiment whether you will only count organisms that are fully inside the transect or whether you will also count the organisms that touch the transect lines.
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4 years ago
#5
The use of a transect is usually accompanied by quadrats. Also, transects are mainly used to see how the distribution changes from a fixed point, for example, the distance from the sea in relation to the distribution of worms.
Hope this helps!
(Original post by haseeb_jarral786)
When using a transect to measure the distribution of an organism, can you count the number of organisms that touch the tape measure? If so, how does that give you the distribution as some of the organisms will be missed (if they are too short to touch the tape measure)?
1
4 years ago
#6
(Original post by elliotharmer)
Actually you can decide before your experiment whether you will only count organisms that are fully inside the transect or whether you will also count the organisms that touch the transect lines.
I guess but that must also depend on the assumptions you choose to undertake but according to aqa biology it states in the revision textbook that you can measure the distribution of organisms by using a transect grid where you then count the organisms within the quadrate- again it might state in the question that the person chooses to count the organisms that also touch the transect
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