Saturday, 30 March 2013

4.7 explain why only about 10% of energy is transferred from one trophic level to the next.

The reason why not all of the energy will make it to the next tropic level is that some of it will be used up on the level it is at. The energy is used for the life processes of the animal that it is in.
e.g If a bunny rabbit eats a cabbage, it will use some of the energy to keep warm, some to move e.c.t so fox only gets some of the original energy from the cabbage.

12 comments:

  1. Also the rabbit may not eat all the parts of the cabbage (eg. roots) so it won't get all the energy stored in the cabbage.
    Some of the cabbage may not get digested and so will pass as faeces.
    There are some other points but I can't remember

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  2. This is because at each level energy is wasted on;

    - Respiration (most of it as waste heat)
    - Undigested / egested food
    - Used in movement

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  3. Not trying to be critical but isn't it etc.

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  4. Not trying to be critical but isn't it etc.

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  5. not trying to be 'critical' but it is said as ' Not trying to be a critic'

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  6. You wrote tropic level. It needs to be trophic level

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  7. You wrote tropic level. It needs to be trophic level

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    Replies
    1. We heard you the first time dont have to say it again

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  8. The Biology Syllabus has changed…

    Here is a New blog for the 2017 Syllabus:

    http://igcse-biology-2017.blogspot.hk

    ReplyDelete
  9. more at

    http://igcse-biology-notes.blogspot.hk/2017/06/47-explain-why-only-10-of-energy-is.html

    ReplyDelete