Determining diet is a key prerequisite for understanding species interactions, food web
structure and ecological dynamics. In recent years, there has been considerable …

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 …

Exposure to methylmercury (MeHg) can result in detrimental health effects in wildlife. With
advances in ecological indicators and analytical techniques for measurement of MeHg in a …

Temporal variation characterizes many of Earth's ecosystems. Despite this, little is known
about how food webs respond to regular variation in time, such as occurs broadly with …

Amino acid nitrogen isotopic analysis is a relatively new method for estimating trophic
position. It uses the isotopic difference between an individual's 'trophic'and 'source'amino …

Identifying the composition of avian diets is a critical step in characterizing the roles of birds
within ecosystems. However, because birds are a diverse taxonomic group with equally …

The annual migration of∼ 1.2 million wildebeest (Connochaetes taurinus) through the
Serengeti Mara Ecosystem is the largest remaining overland migration in the world. One of …

The measurement of stable carbon (δ13C) and nitrogen (δ15N) isotopes in tissues of
organisms has formed the foundation of isotopic food web reconstructions, as these values …

Diets estimated from different proxies such as stable isotopes, stomach contents, and dental
microwear often disagree, leading to nominally well‐supported but greatly differing …

Managing Arctic marine resources to be resilient to environmental changes requires
knowledge of how climate change is affecting marine food webs and fisheries. Changes to …