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Turnover rates of nitrogen stable isotopes in the salt marsh mummichog, Fundulus heteroclitus, following a laboratory diet switch

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dc.contributor.author Logan, John
dc.contributor.author Haas, Heather
dc.contributor.author Deegan, Linda A.
dc.contributor.author Gaines, Emily F.
dc.date.accessioned 2006-01-03T16:20:46Z
dc.date.available 2006-01-03T16:20:46Z
dc.date.issued 2005-09-19
dc.identifier.uri http://hdl.handle.net/1912/371
dc.description Author Posting. © The Authors, 2005. This is the author's version of the work. It is posted here by permission of Springer-Verlag GmbH for personal use, not for redistribution. The definitive version was published in Oecologia 147 (2006): 391-395, doi:10.1007/s00442-005-0277-z.
dc.description.abstract Nitrogen stable isotopes are frequently used in ecological studies to estimate trophic position and determine movement patterns. Knowledge of tissue-specific turnover and nitrogen discrimination for the study organisms is important for accurate interpretation of isotopic data. We measured δ15 N turnover in liver and muscle tissue in juvenile mummichogs, Fundulus heteroclitus, following a laboratory diet switch. Liver tissue turned over significantly faster than muscle tissue suggesting the potential for a multiple tissue stable isotope approach to study movement and trophic position over different time scales; metabolism contributed significantly to isotopic turnover for both liver and muscle. Nitrogen diet-tissue discrimination was estimated at between 0.0 and 1.2‰ for liver and –1.0 and 0.2‰ for muscle. This is the first experiment to demonstrate a significant variation in δ15 N turnover between liver and muscle tissues in a fish species. en
dc.description.sponsorship This study was funded by NSF LTER grant OCE-9726921. en
dc.format.extent 170793 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.relation.uri http://dx.doi.org/10.1007/s00442-005-0277-z
dc.subject Discrimination en
dc.subject Liver en
dc.subject Metabolism en
dc.subject Trophic level en
dc.title Turnover rates of nitrogen stable isotopes in the salt marsh mummichog, Fundulus heteroclitus, following a laboratory diet switch en
dc.type Preprint en


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