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dc.contributor.authorHadwen, Wade L
dc.contributor.authorSpears, Mark
dc.contributor.authorKennard, Mark J
dc.date.accessioned2017-05-03T13:16:33Z
dc.date.available2017-05-03T13:16:33Z
dc.date.issued2010
dc.date.modified2010-09-01T08:07:44Z
dc.identifier.issn0018-8158
dc.identifier.doi10.1007/s10750-010-0303-y
dc.identifier.urihttp://hdl.handle.net/10072/33241
dc.description.abstractStream food web function is often assessed using carbon stable isotope assessments of the relative contribution of autochthonous and allochthonous sources of organic matter to consumer diets. As a result, variability in source signatures can strongly influence the assessment of carbon flows. To examine the implications of temporal source variability on food web interpretations, benthic algal d13C signatures were measured over 8 weeks in five streams in subtropical Queensland, Australia. All food webs were largely driven by benthic algal carbon; however, substantial week-to-week variation in benthic algal d13C signatures modified the calculated contributions of algae to consumer diets, with differences in autochthonous contributions of up to 11% between weeks. In addition, variable algal signatures led to many occasions in which the d13C signatures of some consumers was beyond the range of available sources, meaning the mixing model analyses did not have a valid solution. Together, these findings suggest that temporal variability in algal d13C signatures can strongly influence the interpretation of carbon flows in stream food webs. Future food web studies should assess the temporal variability of sources prior to sampling consumers, in order to characterise end member signatures and their relevance to consumers at the time of collection.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent377105 bytes
dc.format.extent50100 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.languageEnglish
dc.language.isoen_AU
dc.publisherSpringer
dc.publisher.placeNetherlands
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom239
dc.relation.ispartofpageto251
dc.relation.ispartofjournalHydrobiologia
dc.relation.ispartofvolume651
dc.rights.retentionY
dc.subject.fieldofresearchCommunity Ecology (excl. Invasive Species Ecology)
dc.subject.fieldofresearchFreshwater Ecology
dc.subject.fieldofresearchEcosystem Function
dc.subject.fieldofresearchEarth Sciences
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchBiological Sciences
dc.subject.fieldofresearchcode060202
dc.subject.fieldofresearchcode060204
dc.subject.fieldofresearchcode050102
dc.subject.fieldofresearchcode04
dc.subject.fieldofresearchcode05
dc.subject.fieldofresearchcode06
dc.titleTemporal variability of benthic algal δ13C signatures influences assessments of carbon flows in stream food webs
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.rights.copyright© 2010 Springer Netherlands. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. The original publication is available at www.springerlink.com
gro.date.issued2010
gro.hasfulltextFull Text
gro.griffith.authorKennard, Mark J.
gro.griffith.authorHadwen, Wade L.
gro.griffith.authorSpears, Mark D.


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