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dc.contributor.authorMorris, C
dc.contributor.authorLee, SY
dc.contributor.authorvan de Merwe, J
dc.date.accessioned2018-07-19T12:30:26Z
dc.date.available2018-07-19T12:30:26Z
dc.date.issued2015
dc.identifier.issn1470-160X
dc.identifier.doi10.1016/j.ecolind.2015.03.028
dc.identifier.urihttp://hdl.handle.net/10072/117701
dc.description.abstractNitrogen stable isotope values (δ15N) have commonly been used as a qualitative indicator of catchment urbanization in estuaries, but no quantitative relationship has to date been established between δ15N and degree of urbanization. We sampled five species of common estuarine fish (Mugil cephalus, Acanthopagrus australis, Sillago ciliata, Gerres subfasciatus and Herklotsichthys castelnaui) of different trophic levels from six estuaries in Southeast Queensland, Australia, to test if a quantitative relationship exists between fish δ15N and urbanization in the catchment. Degree of urbanization (urban %) in the catchment adjacent to the tidal estuary was measured using polygons constructed in Google Earth images, and verified using data from the detailed Queensland Land Use Mapping Project (QLUMP). Significant linear relationships exist between fish δ15N and urban % in most cases irrespective of the section of the estuary (upper, middle and lower) where the fish were caught, with no difference in slope and elevation between lines established for different sections. Inclusion of additional fish δ15N data from other Australian estuaries in a combined multiple regression model adding trophic level as a predictor generated a significant relationship predicting increase in fish δ15N values with increasing urban % and trophic level. There is therefore a generic quantitative relationship between estuarine fish δ15N values and degree of urbanization applicable to different fish species, geographic location or feeding habit. While the generality of this relationship needs to be tested further in other geographic locations, our findings potentially improve the applicability of fish δ15N values as a quantitative indicator of urban influence in estuaries.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeNetherlands
dc.relation.ispartofpagefrom41
dc.relation.ispartofpageto49
dc.relation.ispartofjournalEcological Indicators
dc.relation.ispartofvolume56
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchEnvironmental sciences
dc.subject.fieldofresearchBiological sciences
dc.subject.fieldofresearchMarine and estuarine ecology (incl. marine ichthyology)
dc.subject.fieldofresearchcode34
dc.subject.fieldofresearchcode41
dc.subject.fieldofresearchcode31
dc.subject.fieldofresearchcode310305
dc.titleδ15N of estuarine fishes as a quantitative indicator of urbanization
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.description.versionAccepted Manuscript (AM)
gro.facultyGriffith Sciences, School of Environment and Science
gro.rights.copyright© 2015 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorvan de Merwe, Jason P.
gro.griffith.authorLee, Joe Y.
gro.griffith.authorHyde, Ciaran A.


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