Data from: Amino acid δ15N underestimation of cetacean trophic positions highlights poor understanding of isotopic fractionation in higher marine consumers

Cory Matthews, Iliana Ruiz-Cooley, Corinne Pomerleau & Steven Ferguson
Compound specific stable isotope analysis (CSIA) of amino acids (AAs) has been rapidly incorporated in ecological studies to resolve consumer trophic position (TP). Differential 15N fractionation of ‘trophic’ AAs, which undergo 15N enrichment with each trophic step, and ‘source’ AAs, which undergo minimal trophic 15N enrichment and serve as a proxy for primary producer δ15N values, allows for internal calibration of TP. Recent studies, however, have shown the difference between source and trophic AA δ15N...
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