Comparing results from 2003 and 2000
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The figure above shows the isotopic compositions of fingernails
from visitors at the 2000 Open House. The position of each
point reflects the individual diet of the visitor (e.g.,
the relative amounts of marine fish, meat, fruits &
vegetables, etc.). View larger image.
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The chart
above shows
the Nitrogen and Carbon isotopic compositions of typical foods,
and
how different types of diet cause different isotopic compositions
of the consumer’s fingernails and hair (as shown by
the arrows below).
Hence, by measuring the isotopic compositions of your fingernails,
we can see differences in the diets of visitors at the time
that the fingernails were formed. View larger image.
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