Fig. 3
From: Trophic niche partitioning of littoral fish species from the rocky intertidal of Helgoland, Germany
Stable isotope biplots of nitrogen stable isotopes (δ 15N) versus carbon stable isotopes (δ 13C) of the fish species Ctenolabrus rupestris, Pomatoschistus minutus, Pomatoschistus pictus, Myoxocephalus scorpius and Taurulus bubalis collected from 2009 to 2011. Baseline organisms Littorina littorea and Mytilus edulis are represented as mean values. a Samples are marked according to their sampling year; b samples are marked according to species