Trophic transfer of metals along freshwater food webs: Evidence of cadmium biomagnification in nature

  title={Trophic transfer of metals along freshwater food webs: Evidence of cadmium biomagnification in nature},
  author={Marie-No{\"e}le Croteau and Samuel N. Luoma and A. Robin Stewart},
  journal={Limnology and Oceanography},
We conducted a study with cadmium (Cd) and copper (Cu) in the delta of San Francisco Bay, using nitrogen and carbon stable isotopes to identify trophic position and food web structure. Cadmium is progressively enriched among trophic levels in discrete epiphyte‐based food webs composed of macrophyte‐dwelling invertebrates (the first link being epiphytic algae) and fishes (the first link being gobies). Cadmium concentrations were biomagnified 15 times within the scope of two trophic links in both… 

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