Robustly quantifying dietary resource use and trophic position using stable isotopes
requires accurate trophic discrimination factors (TDF; Δ13C and Δ15N for carbon and …

Stable isotopes of carbon, nitrogen, and sulfur are used as ecological tracers for a variety of
applications, such as studies of animal migrations, energy sources, and food web pathways …

Stable isotope analysis provides a powerful tool to identify the energy sources which fuel
consumers, to understand trophic interactions and to infer consumer trophic position (TP), an …

Compound‐specific stable isotope analysis (CSIA) of individual amino acids (AA s) has
become a powerful analytical tool in trophic ecology. Heavily fractionating “trophic” AA s (eg …

Stable isotope analysis has emerged as one of the primary means for examining the
structure and dynamics of food webs, and numerous analytical approaches are now …

Compound-specific isotopic analysis of amino acids (CSIA-AA) has emerged in the last
decade as a powerful approach for tracing the origins and fate of nitrogen in ecological and …

Use of stable isotope ratios to trace pathways of organic matter among consumers requires
knowledge of the isotopic shift between diet and consumer. Variation in trophic shift among …

The development of the isotopic niche, an n-dimensional hypervolume (with n being the
number of isotopes) occupied by a population in delta space, has revolutionized the study of …

Summary 1 The use of stable isotopic techniques to study animal diets and trophic levels
requires a priori estimates of discrimination factors (Δ13C and Δ15N, also called …

Summary 1 Although conceptually robust, it has proven difficult to find practical measures of
niche width that are simple to obtain, yet provide an adequate descriptor of the ecological …