Hello good morning, I am trying to perform a stable isotope analysis. I want to standardize the food webs of 5 different lakes. For each of them I have a representative of the pelagic (Diplodon sp.) and littoral (Chilina sp.) trophic web, except for one lake (CC) where I only have Diplodon. What do you recommend me to do? For that lake, other items that I have are: Aegla, Chironomids, Ephemeroptera, Hyallela, Notonectidae, Odonato (Aniso and zygo), Plecoptera, Trichoptera.