Trophic position derived from amino-acid nitrogen isotopes reflect physiological status of both predator and prey over four decades
A. M. Karlson, C. Ek, D. Jones
The paper uses nitrogen isotope analyses in amino acids to show that trophic position estimates in cod and herring are influenced by physiological status and environmental factors over four decades.
bioRxiv · Jan 25, 2021 · PreprintEcology