Dictionary of Human Evolution and Biology

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C3 Vegetation

Evolutionarily older trees, fruits, bushes, shrubs, and forbs that discriminate against the heavy 13C isotope during fixation of CO2 by fixing carbon in a three-carbon compound in the C3 photosynthetic pathway. C3 plants have a relatively low 13C ratio (13C:12C ratio). Used in dietary analysis to identify C3 consumers.

See carbon isotope analysis.

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