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    For my A2 Biology Coursework I have to investigate the effect of an abiotic factor on a biotic factor. What investigation can I do with Holly (Ilex aquifolium)? Some ideas I had:

    Investigate the effect of light intensity (because I know they are shade resistant), but what relevant biotic factor would I measure? Height (hard because it grows strangely), leaf thickness, etc?

    Investigate the effect of soil moisture content on the spines of the leaves (because apparently drought is what causes higher/older leaves to be spineless instead of spiney like the lower/younger ones) but how could I measure the proportion of spineyness to spinelessness?

    Thanks for any help
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    (Original post by Grife)
    For my A2 Biology Coursework I have to investigate the effect of an abiotic factor on a biotic factor. What investigation can I do with Holly (Ilex aquifolium)? Some ideas I had:

    Investigate the effect of light intensity (because I know they are shade resistant), but what relevant biotic factor would I measure? Height (hard because it grows strangely), leaf thickness, etc?

    Investigate the effect of soil moisture content on the spines of the leaves (because apparently drought is what causes higher/older leaves to be spineless instead of spiney like the lower/younger ones) but how could I measure the proportion of spineyness to spinelessness?

    Thanks for any help
    Why don't you look at the dry weight? You'd have to plant loads of them though...Why are you only looking at holly? Use something easier e.g. watercress and measure height
 
 
 
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