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    Pyramid of biomass..mass of organisms in each level of a food chain at a specific time, in a given area. ok so how come in my revision book there is a normal pyramid shape of biomass with

    hawk (v small rectangle)
    blue tit (small rect)
    ladybird (middle size rect)
    aphid (bigger rect)
    oak tree (v large rect)

    in that order? surely ladybirds have less biomass than a hawk?? Thanks
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    Maybe it's the combined weight of them all...? There's more ladybirds than hawks.
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    (Original post by tis_me_lord)
    Maybe it's the combined weight of them all...? There's more ladybirds than hawks.
    I thought only pyramid of numbers accounted for numbers though, is it not the biomass of one organism?
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    Hiya,
    I haven't done Biology for a while but I reckon...
    Individually, yes, one ladybird has a much less bio-mass than a hawk. But in that food chain, there may only be one hawk, but a whole load of ladybirds, so collectively, the ladybirds have a larger biomass than the one hawk. There may only be one tree as well, but that obviously has a bigger bio-mass than any of the others cos it's so huge.

    I think that's right. Good luck with your exam.
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    Ok thank you all so much for your posts! Thanks so much for trying to help! I think i thought the pyramid was irrespective of numbers but I think you're right, thanks
 
 
 
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