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# energy transfer... I'm so confused! HELP watch

1. I understand everything else about productivity but I don't understand what they mean by 'per square metre'? Are they measuring the surface area of each animal or something? Or maybe I've misinterpreted it, and wouldn't it have been better to measure mass or volume instead of area?
2. (Original post by tammie94)
I understand everything else about productivity but I don't understand what they mean by 'per square metre'? Are they measuring the surface area of each animal or something? Or maybe I've misinterpreted it, and wouldn't it have been better to measure mass or volume instead of area?
This means per square metre of land.
3. (Original post by joostan)
This means per square metre of land.
But they said 'productivity gives an idea of how much energy is available to the organisms at a particular trophic level, per square metre in a given amount of time.' How can land give and indicator of energy?
4. (Original post by tammie94)
But they said 'productivity gives an idea of how much energy is available to the organisms at a particular trophic level, per square metre in a given amount of time.' How can land give and indicator of energy?
Organisms occupy land. The number of organisms in an area of land and the amount of energy they use/produce can then be used to estimate the energy used/produced by organisms in a given amount of land - e.g. per square metre.
5. (Original post by joostan)
Organisms occupy land. The number of organisms in an area of land and the amount of energy they use/produce can then be used to estimate the energy used/produced by organisms in a given amount of land - e.g. per square metre.
Ahh I see, that makes sense. Thanks
6. (Original post by tammie94)
Ahh I see, that makes sense. Thanks
np
7. Isn't productivity a measure of the energy rich compounds (increasing biomass) produced by primary producers, per sq meter?
8. (Original post by Dynamo123)
Isn't productivity a measure of the energy rich compounds (increasing biomass) produced by primary producers, per sq meter?
Who said it wasn't?
I just explained the per sq. metre.
9. Well, i tried posting,the reply yesterday, but couldnt get it. Thanks for clearing it up though

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10. (Original post by Dynamo123)
Well, i tried posting,the reply yesterday, but couldnt get it. Thanks for clearing it up though

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no prob

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