δ15N versus δ13C bi-plot showing the mean isotope values of aquatic consumers in Lake Constance during summer (August and September). Horizontal and vertical bars represent ± SD of total pooled data. The standard ellipse areas (SEAc) represent the core isotopic niche for each trophic guild (comprising ~ 40% of the data; (Jackson et al. 2011)).

 
 
  Part of: Gugele SM, Baer J, Spießl C, Yohannes E, Blumenshine S, Roberts BJ, Mota-Ferreira MR, Brinker A (2023) Stable isotope values and trophic analysis of invasive three-spined stickleback in Upper Lake Constance points to significant piscivory. NeoBiota 87: 73-102. https://doi.org/10.3897/neobiota.87.100355