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- Publisher
- Springer Journals
- Copyright
- Copyright © 2001 by Springer-Verlag
- Subject
- Life Sciences; Ecology; Plant Sciences; Hydrology/Water Resources
- ISSN
- 0029-8549
- eISSN
- 1432-1939
- DOI
- 10.1007/s004420000571
- pmid
- 24577645
- Publisher site
- See Article on Publisher Site
Abstract
Oecologia (2001) 127:166–170 DOI 10.1007/s004420000571 Donald L. Phillips Mixing models in analyses of diet using multiple stable isotopes: a critique Received: 30 January 2000 / Revision: 20 July 2000 / Accepted: 10 October 2000 / Published online: 10 January 2001 © Springer-Verlag 2001 Stable isotope analysis is used frequently to determine which simplifies to: the relative contributions of different food sources to an () DX %X in diet = × 100 (1a) animal’s diet (Hobson 1999). Isotopic ratios for the ani- () DA' +DB' +DC' mal tissues and each of its potential food sources are de- where X represents one of the food sources A, B, or C, termined. The similarity of the ratios for the animal tis- and DX rep resents the corresponding line distance DA′, sues with those of individual food sources (after correct- DB′, or DC′. ing for fractionation during digestion and assimilation) Whitledge and Rabeni (1997) used reciprocal distanc- gives an idea of their relative importance in the diet; in es in the formula: other words “you are what you eat” (DeNiro and Epstein 1978). Two food sources can be partitioned using the ()11 /1 DA' +/ DB' +1/ DC' − / DX 13 %X
Journal
Oecologia – Springer Journals
Published: Apr 1, 2001