Are isotopes representing reliably the structure of food webs?

Franck Jabot, Carolina Giraldo, Sébastien Lefebvre and Stanislas Dubois Most atoms can be found in nature in various forms that are called isotopes. Primary producers (plants, algae, bacteria…) often have different isotopic compositions, notably in carbon isotopes, so that the isotopic composition of their consumers will reflect the food items it has consumed. But the…