Source partitioning using stable isotopes: coping with too many sources

By D. Phillips, J. Gregg. Oecologia, 2003

2,121 citations recorded by the source corpus.

Subfields: Ecology, Geochemistry and Petrology, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/02ec6fe21b52e5a175a549faa1ff742bdb2521f7

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Ecology

1. Keith A. Hobson
2. S. Bearhop
3. S. Newsome
4. Richard Inger
5. S. Iverson
6. J. Yeakel
7. D. Hoeinghaus
8. N. Karnovsky

In Geochemistry and Petrology

1. Keith A. Hobson
2. S. Bearhop
3. Richard Inger
4. I. Jones
5. A. Bond
6. R. Terry
7. B. Semmens
8. G. Sarà

In Global and Planetary Change

1. Keith A. Hobson
2. S. Bearhop
3. S. Iverson
4. Richard Inger
5. G. Sarà
6. S. Newsome
7. R. Sara
8. N. Karnovsky

Citations in the corpus

• Feeding habits and trophic levels of bluefin tuna Thunnus thynnus of different size classes in the Mediterranean Sea (2007, methodology): “ISOSOURCE software (Phillips and Gregg, 2003; Newsome et al., 2004; Sarà et al., 2004) was used to calculate all mixing models.”
• Overlap and partitioning of the ecological and isotopic niches (2010, methodology): “2; Phillips 2001, Phillips and Gregg 2003).”
• Use of sulfur and nitrogen stable isotopes to determine the importance of whitebark pine nuts to Yellowstone grizzly bears (2003, methodology): “With two isotopic ratios (δ15N, δ34S), unique solutions only exist for contributions of three or fewer sources when standard mixing models are used (Phillips and Gregg 2003). However, there were five major food sources for the Yellowstone bears (Table 2). Consequently, the IsoSource model described ”
• On raptors and rodents: testing the ecological fidelity and spatiotemporal resolution of cave death assemblages (2010, methodology): “The mixing model analysis was done using IsoSource version 1.3.1 (Phillips and Gregg 2003).”
• Carnivory is Positively Correlated with Latitude among Omnivorous Mammals: Evidence from Brown Bears, Badgers and Pine Martens (2009, background): “Although the use of two stable isotopes allows for determination of inputs from only three isotopically distinct sources, the recent development of probabilistic models has made it possible to estimate the range of dietary inputs from more than three sources (Phillips & Gregg 2003).”
• To fit or not to fit: evaluating stable isotope mixing models using simulated mixing polygons (2013, methodology): “This means that if a particular dietary source is within a polygon of other sources, it need not contribute to themixing model (Phillips & Gregg 2003) and will usually not be important in the mixing polygon simulation.”
• Delayed ontogenic dietary shift and high levels of omnivory in green turtles (Chelonia mydas) from the NW coast of Africa (2009, background): “Combinations that sum to the observed mixture of isotopic signatures within a small tolerance (±0.1% in this study) are considered to be feasible solutions, from which the frequency and range of potential source contributions can be determined ( Phillips and Gregg 2003 ).”
• Applications of stable isotope analyses to avian ecology (2008, methodology): “More advanced methods have relaxed these restrictions, although the outputs of these multi-source mixing models have a much lower resolution (Phillips & Gregg 2003).”
• ANTHROPOGENIC ENRICHMENT ALTERS A MARINE BENTHIC FOOD WEB (2005, methodology): “Descriptive statistics for mixed-diet analyses—mean, standard deviation, and 1–99 percentile ranges, were reported from the IsoSource program.”
• Tracing the ecophysiology of ungulates and predator–prey relationships in an early Pleistocene large mammal community (2008, methodology): “This model has been satisfactorily applied to studies of the diet of living carnivores (Phillips, 2001; Phillips and Koch, 2002; Phillips and Gregg, 2003) as well as to derive inferences on the diet of extinct species, including Neanderthals and anatomically modern humans (Drucker and Bocherens,…”
• Stable isotopes (δ13C, δ15N) and modelling as tools to estimate the trophic ecology of cultivated oysters in two contrasting environments (2007, methodology): “Modelling As proposed by Phillips and Gregg (2003), a mixing model was used to calculate the contributions of the potential OMS (PhyOM, TOM, MPB, ULV, and SOM) to the oysters’ diets.”
• Applying stable isotopes to examine food‐web structure: an overview of analytical tools (2012, positive): “That is, researchers often interpret some measure of central tendency (e.g. the median or mode) as the definitive solution, a conclusion which is clearly not justified by the structure of the model (Phillips & Gregg, 2003).”
• Combining sources in stable isotope mixing models: alternative methods (2005, methodology): “In this case, the IsoSource method (Phillips and Gregg 2003) can be used to bound the range of source contributions consistent with isotopic mass balance.”
• Isotopic ecology ten years after a call for more laboratory experiments (2009, methodology): “Most studies rely on two isotopes (13C and 15N), and thus: d13CT ¼ fAd13CA ] fBd13CB ] fCd13CC ð8Þ d15NT ¼ fAd15NA ] fBd15NB ] fCd15NC ð9Þ 1 ¼ fA ] fB ] fC: ð10Þ Phillips & Gregg (2001, 2003) have developed methods to (1) estimate the uncertainty in source proportions (fi) based on the variance in…”