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dc.contributor.authorJardine, Timothy D
dc.contributor.authorKidd, Karen A
dc.contributor.authorCunjak, Richard A
dc.date.accessioned2017-05-03T15:30:01Z
dc.date.available2017-05-03T15:30:01Z
dc.date.issued2009
dc.date.modified2010-06-03T09:02:51Z
dc.identifier.issn0887-3593
dc.identifier.doi10.1899/09-046.1
dc.identifier.urihttp://hdl.handle.net/10072/29987
dc.description.abstractStable H isotope ratios (D/H, expressed as dD) hold promise as an additional tool for elucidating food sources for consumers in aquatic ecosystems. We tested the applicability of dD as a food source tracer in streams of New Brunswick, Canada. First, we analyzed dD and d13C in biofilm and terrestrial leaves and compared signal-to-noise ratios (variability within sources vs variability between sources) between the 2 elements. Signal-to-noise ratios were roughly similar, and 23 of the 31 sites had isotopically distinct food sources based on dD compared to 20 of 31 based on d13C. Second, we used mixing models to estimate % aquatic H and % aquatic C for benthic invertebrates at a subset of sites. Of 16 samples, only 1 had d13C that was outside the range of the 2 food sources (yielding % aquatic C . 100%), but 12 of the 16 samples had dD outside the range of the food sources, a result suggesting confounding effects of water and lipids on total body H content. Last, we analyzed dD in laboratory-reared consumers (brook trout and water striders) and in their diet before and after lipid extraction to estimate diet-tissue fractionation. Large differences between consumer and diet were apparent before lipid extraction, but no significant differences were found after lipid extraction. All of these measures indicate that dD could serve as a complementary, but not alternative, isotopic method for estimating food sources for consumers in streams. Further laboratory trials are needed to explore the influence of lipids on dD values.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent365391 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherNorth American Benthological Society
dc.publisher.placeUSA
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom885
dc.relation.ispartofpageto893
dc.relation.ispartofissue4
dc.relation.ispartofjournalJournal of the North American Benthological Society
dc.relation.ispartofvolume28
dc.rights.retentionY
dc.subject.fieldofresearchFreshwater Ecology
dc.subject.fieldofresearchEcology
dc.subject.fieldofresearchFisheries Sciences
dc.subject.fieldofresearchcode060204
dc.subject.fieldofresearchcode0602
dc.subject.fieldofresearchcode0704
dc.titleAn evaluation of deuterium as a food source tracer in temperate streams of eastern Canada
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.rights.copyright© 2009 North American Benthological Society. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
gro.date.issued2009
gro.hasfulltextFull Text
gro.griffith.authorJardine, Timothy


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