Modelling food chain structure and contaminant bioaccumulation using stable nitrogen isotopes

@article{Cabana1994ModellingFC,
  title={Modelling food chain structure and contaminant bioaccumulation using stable nitrogen isotopes},
  author={Gilbert Cabana and Joseph B. Rasmussen},
  journal={Nature},
  year={1994},
  volume={372},
  pages={255-257}
}
THE nitrogen pools of animals are enriched in 15N relative to their food1, with the top predators having the highest concentrations of this stable isotope2. The use of δ15N to indicate trophic position depends on the degree to which it reflects variation in the underly-ing food-web structure, rather than variable fractionation along the food chain. Here we compare adult lake trout, a top pelagic predator, from a series of lakes, and find that δ15N values vary from 7.5 to 17.5%o, a surprisingly… CONTINUE READING
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