Effect of temperature and ration size on carbon and nitrogen stable isotope trophic fractionation

By C. Barnes, Christopher J. Sweeting, S. Jennings, J. Barry, Nicholas V.C. Polunin. 2007

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The problem of isotopic baseline: Reconstructing the diet and trophic position of fossil animals (2011, background): “Hot, arid soils inhibit atmospheric Nfixation (Bate, 1981; Granhall, 1981; Ambrose, 1991) and are characterized by more open nutrient cycling (Swap et al., 2004) resulting in higher δ15N values.”
Rates and components of carbon turnover in fish muscle: insights from bioenergetics models and a whole-lake 13C addition (2011, background): “Conversely, if the isotopic shift is closer to 2.0% as suggested by Pinnegar and Polunin (1999) and Barnes et al. (2007), our half-life estimates increase by an average of +30%, although results are variable (range: 20% decrease to 100% increase).”
Nursery habitat use and foraging ecology of the brown stingray Dasyatis lata determined from stomach contents, bulk and amino acid stable isotopes (2011, unknown): “…in TEFs owing to variables such as species, tissue type, diet, environment, method of excretion and biochemical composition (Pinnegar & Polunin 1999, Vander Zanden & Rasmussen 2001, McCutchan et al. 2003, Vanderklift & Ponsard 2003, MacNeil et al. 2006, Barnes et al. 2007, Caut et al. 2009).”