Trophic structure of benthic resources and consumers varies across a regulated floodplain wetland

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dc.contributor.authorKelleway, JJen_AU
dc.contributor.authorMazumder, Den_AU
dc.contributor.authorWilson, GGen_AU
dc.contributor.authorSaintilan, Nen_AU
dc.contributor.authorKnowles, Len_AU
dc.contributor.authorIles, Jen_AU
dc.contributor.authorKobayashi, Ten_AU
dc.date.accessioned2010-07-05T00:49:59Zen_AU
dc.date.available2010-07-05T00:49:59Zen_AU
dc.date.issued2010-04-27en_AU
dc.date.statistics2010-04-27en_AU
dc.description.abstractRiverine food webs are often laterally disconnected (i.e. between watercourses) in regulated floodplain wetlands for prolonged periods. We compared the trophic structure of benthic resources and consumers (crustaceans and fish) of the three watercourses in a regulated floodplain wetland (the Gwydir Wetlands, Australia) that shared the same source water but were laterally disconnected. The crustaceans Cherax destructor (yabby), Macrobrachium australiense (freshwater prawn), the exotic fish Cyprinus carpio (European carp) and Carassius auratus (goldfish) showed significantly different δ13C values among the watercourses, suggesting spatial differences in primary carbon sources. Trophic positions were estimated by using δ15N values of benthic organic matter as the base of the food web in each watercourse. The estimated trophic positions and gut contents showed differences in trophic positions and feeding behaviours of consumers between watercourses, in particular for Melanotaenia fluviatilis (Murray–Darling rainbowfish) and M. australiense. Our findings suggest that the observed spatial variation in trophic structure appears to be largely related to the spatial differences in the extent and type of riparian vegetation (i.e. allochthonous carbon source) across the floodplain that most likely constituted part of the benthic resources. © 2010, CSIRO Publishingen_AU
dc.identifier.citationKelleway, J., Mazumder, D., Wilson, G. G., Saintilan, N., Knowles, L., Iles, J., & Kobayashi, T. (2010). Trophic structure of benthic resources and consumers varies across a regulated floodplain wetland. Marine and Freshwater Research, 61(4), 430-440. doi:10.1071/MF09113en_AU
dc.identifier.govdoc1843en_AU
dc.identifier.issn1323-1650en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleMarine and Freshwater Researchen_AU
dc.identifier.pagination430-440en_AU
dc.identifier.urihttp://dx.doi.org/10.1071/MF09113en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1743en_AU
dc.identifier.volume61en_AU
dc.language.isoenen_AU
dc.publisherCSIRO Publishingen_AU
dc.subjectCarbon sourcesen_AU
dc.subjectPlantsen_AU
dc.subjectRiversen_AU
dc.subjectSpatial distributionen_AU
dc.subjectStable isotopesen_AU
dc.subjectWateren_AU
dc.titleTrophic structure of benthic resources and consumers varies across a regulated floodplain wetlanden_AU
dc.typeJournal Articleen_AU
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