Jess Stevens presents 'A Beginner’s Guide to Stable Isotope Analysis in Trophic Ecology: An Open Educational Resource', Dec. 11

Jess Stevens, M.S. candidate in Biology will present 'A Beginner's Guide to Stable Isotope Analysis in Trophic Ecology: An Open Educational Resource' on Dec. 11.

Abstract

This capstone serves as an open educational resource for college-level students and introduces the core ideas and applications of stable isotope analysis (SIA) in trophic ecology. It opens with an explanation of what stable isotopes are and how natural variation in isotope ratios arises through fractionation, providing the chemical grounding needed to understand their ecological relevance. A brief historical overview follows, highlighting the technological and conceptual developments that allowed SIA to move from geochemistry into mainstream ecological research. Building on this foundation, the project outlines several key considerations that guide effective study design, including the selection of appropriate sample types, tissue turnover rates, and the environmental and physiological factors that shape isotopic signatures. Practical information is also provided on preparing samples and analyzing them in the laboratory. Finally, this capstone focuses on the analytical tools used to interpret isotope data by summarizing the major approaches for estimating trophic position, characterizing isotopic niche structure, and evaluating dietary contributions. To support learning and encourage active engagement, each section includes assessment and application questions that prompt readers to check their understanding, examine assumptions, and connect theoretical concepts to real world examples.

Event details

Event location - Zoom
Event date - Dec. 11, 2025
Event start time - 10:30 a.m.
Event end time - 11:30 a.m.

Zoom link