# GCSE AQA Biomass Question

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#1
PLEASE CAN SOMEONE EXPLAIN TO ME THE ANSWER TO NO 9 I THOUGHT THE ANSWER WAS THE FIRST ONE AS BIOMASS IS SUPPOSED TO GO DOWN AT EACH STAGE.. A QUESTION.. IF THERE IS MORE OF AN ORGANISM DOES THAT MEAN THAT THERE IS MORE BIOMASS?? CHEERS

http://filestore.aqa.org.uk/subjects...P-QP-JUN13.PDF
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6 years ago
#2
(Original post by artymaniac)
PLEASE CAN SOMEONE EXPLAIN TO ME THE ANSWER TO NO 9 I THOUGHT THE ANSWER WAS THE FIRST ONE AS BIOMASS IS SUPPOSED TO GO DOWN AT EACH STAGE.. A QUESTION.. IF THERE IS MORE OF AN ORGANISM DOES THAT MEAN THAT THERE IS MORE BIOMASS?? CHEERS

http://filestore.aqa.org.uk/subjects...P-QP-JUN13.PDF
Hey there, I'm just going to rename your thread so hopefully it'll get more replies.
1
6 years ago
#3
(Original post by artymaniac)
PLEASE CAN SOMEONE EXPLAIN TO ME THE ANSWER TO NO 9 I THOUGHT THE ANSWER WAS THE FIRST ONE AS BIOMASS IS SUPPOSED TO GO DOWN AT EACH STAGE.. A QUESTION.. IF THERE IS MORE OF AN ORGANISM DOES THAT MEAN THAT THERE IS MORE BIOMASS?? CHEERS

http://filestore.aqa.org.uk/subjects...P-QP-JUN13.PDF
Biomass is the total mass of the organisms present at each particular stage in the food chain.

If there is more of the organism that does not mean there is more biomass. If you have 10 pigs it would have a much greater biomass than 30 fruit flies. You have to think of the mass of the organisms in question, as well as how many there are.

Now the sharks will have the most mass, but their biomass is smallest because only a few will be present.

On the other hand there will be loads of both types of plankton, but the animal plankton has a greater biomass than the plant. So it's the last one.

Hope that helps
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#4
thx for yr help, the mark scheme says its the last one why???
(Original post by Tilly-Elizabeth)
Biomass is the total mass of the organisms present at each particular stage in the food chain.

If there is more of the organism that does not mean there is more biomass. If you have 10 pigs it would have a much greater biomass than 30 fruit flies. You have to think of the mass of the organisms in question, as well as how many there are.

Now the sharks will have the most mass, but their biomass is smallest because only a few will be present.

On the other hand there will be loads of both types of plankton, but the animal plankton has a greater biomass than the plant. So it's the middle one.
thx for yr help, the mark scheme says its the last one why???
Hope that helps
0
6 years ago
#5
(Original post by artymaniac)
thx for yr help, the mark scheme says its the last one why???
Sorry I meant to write last one. My mistake. It is the last one and my explanation is for that one
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#6
one quick q.. if pyramids of biomass are supposed to reduce(the biomass) as u go alongI still don't get why the animal is bigger than the plant
(Original post by Tilly-Elizabeth)
Sorry I meant to write last one. My mistake. It is the last one and my explanation is for that one
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6 years ago
#7
(Original post by artymaniac)
one quick q.. if pyramids of biomass are supposed to reduce(the biomass) as u go alongI still don't get why the animal is bigger than the plant
The biomass doesn't always have to reduce as you go along - it depends on the size and number of the organisms present at each stage.

If you look at the graph on the page before, in June there are more animal plankton compared with plant plankton, and if you look at the diagram you'll see the animal are larger than the plant so they will probably have a greater mass. So the biomass of animal in June is greater than plant.
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