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Stable isotopes hold promise for improving our ability to quantify energy and N released from earthworm populations through metabolic processes and mortality. However, the isotopic labels 13 C and 15 N must be incorporated uniformly into the structural and labile tissues of earthworms to trace C and N fluxes accurately. We examined the distribution of 13 C and...
Plant materials labelled with 13C can be used to trace litter decomposition and root carbon flow, but only if the isotope is uniformly distributed in the plant. We postulated that if 13CO2 were applied at regular intervals, in direct proportion to the rate of photosynthesis, then the abundance of 13C would be uniform among plant parts. To test this hypothesis, wheat plants were grown in the greenhouse,...
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