New Associate Editor: David Soto

Today, we are pleased to be the latest new member of the Methods in Ecology and Evolution Associate Editor Board. David Soto joins us from the University of Leuven in Belgium and you can find out a little more about him below.

David Soto

“I am an isotope ecologist with interests in developing new stable isotope methods and techniques for tracing spatio-temporal changes in food webs, and understanding animal movement and large-scale migration. My current research focus is on aquatic food webs using isotopic tracers such as hydrogen isotopes, and on insect migration patterns predicting natal origins by combining isoscapes and likelihood-based geospatial assignment methods.”

David is currently working on isotopic methodologies to quantify the linkages and support of aquatic and terrestrial primary production sources into Afrotropical aquatic food webs. He recently developed a new method to distinguish dietary sources combining stable isotopes and trace metal accumulation data. Other recent published articles investigated the use of hydrogen isotopes to track fish provenance and to infer butterfly migration movements across the Sahara. He is also collaborating with the IsoriX core team to develop a new method and R package to infer spatial origins of migratory animals using mixed models.

We are thrilled to welcome David as a new Associate Editor and we look forward to working with him on the journal.

Jellyfish Help Scientists to Fight Food Fraud

Below is a press release about the Methods paper ‘Stable isotope-based location in a shelf sea setting: accuracy and precision are comparable to light-based location method‘ taken from the University of Southampton.

©Katie St John Glew

©Katie St John Glew

Animals feeding at sea inherit a chemical record reflecting the area where they fed, which can help track their movements, according to a new study by scientists from the University of Southampton.

Chemical testing of the source of marine food products could be a powerful tool to help to fight food fraud, maintain healthy sustainable fish stocks or marine protected areas, and ensure consumer confidence in marine eco-labelling. Continue reading

Why Accurate Stable Isotope Discrimination Factors are so Important: A cautionary tale (involving kea)

Post provided by AMANDA GREER

Stable isotopes as a tool for ecologists

Our research into the foraging ecology of this cheeky parrot (kea: Nestor notabilis) prompted us to develop a simple method to establish discrimination factors © Andruis Pašukonis

Our research into the foraging ecology of this cheeky parrot (kea: Nestor notabilis) prompted us to develop a simple method to establish discrimination factors © Andruis Pašukonis

Isotopes are atoms that have the same number of protons and electrons but differ in their number of neutrons; they are lighter and heavier forms of the same element. Unlike radioactive isotopes, stable isotopes do not decay over time.

The ratio of heavy to light stable carbon (δ13C) and nitrogen (δ15N) isotopes in an animal’s tissues depend on its diet, although offset by a certain amount. This integration of δ13C and δ15N from an animal’s diet into its tissues allows ecologists to use stable isotope analysis to investigate a species’ present and historical diets, food-web structures, niche shifts,  migration patterns and more.   Continue reading