Sample Sample code Species Sample species/invertebrate group: Snail (Potamopyrgus antipodarum), Amphipod (Amphipods), Isopod (Isopods), Shrimp (Mysid shrimps), Copepod (copepods), Caddisfly (cased caddisfly) Treated 1 indicates that sample was treated with HCl do dissolve inorganic carbon, 0 indicates no treatment d15N Ratio of stable nitrogen isotopes 15N/14N d13C Ratio of stable nitrogen isotopes 13C/12C C:N.mol.ratio Molar ratio of carbon and nitrogen