Trophic shifts involving native and exotic fish during hydrologic recession in floodplain wetlands

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dc.contributor.authorMazumder, Den_AU
dc.contributor.authorJohansen, MPen_AU
dc.contributor.authorSaintilan, Nen_AU
dc.contributor.authorIles, Jen_AU
dc.contributor.authorKobayashi, Ten_AU
dc.contributor.authorKnowles, Len_AU
dc.contributor.authorWen, Len_AU
dc.date.accessioned2021-08-19T23:25:09Zen_AU
dc.date.available2021-08-19T23:25:09Zen_AU
dc.date.issued2011-12-28en_AU
dc.date.statistics2021-08-19en_AU
dc.description.abstractStable isotopes (δ13C and δ15N) and gut contents were analysed for two species of co-occurring native and exotic fish in three shallow water bodies within an Australian riparian wetland system. During a period of hydrologic recession we found depletions in δ13C of up to −25‰ for algae and −2‰ for sediment organic matter (SOM). The native Hypseleotris sp. (carp gudgeon) and the exotic Cyprinus carpio (common carp) were depleted in δ13C up to −3.2‰, indicating that the SOM was the dominant dietary source of carbon for the two species of fish in both high- and the receded low-water conditions. In the low-water conditions, however, there was a five-fold increase in the occurrence of insects in the gut of the exotic C. carpio and the trophic positions of C. carpio and Hypseleotris sp. were more similar in all three water bodies than at high-water conditions. Our results indicate that there were shifts in dietary sources and trophic positions during hydrologic recession and provide evidence that flow reductions in wetland systems can increase the dietary overlap between native and exotic fishes. © Society of Wetland Scientists 2011en_AU
dc.identifier.citationMazumder, D., Johansen, M., Saintilan, N., Illes, J., Kobayashi, T., Knowles, L., & Wen, L. (2011). Trophic shifts involving native and exotic fish during hydrologic recession in floodplain wetlands. Wetlands, 32, 267–275. doi:10.1007/s13157-011-0262-8en_AU
dc.identifier.issn1943-6246en_AU
dc.identifier.journaltitleWetlandsen_AU
dc.identifier.pagination267-275en_AU
dc.identifier.urihttps://doi.org/10.1007/s13157-011-0262-8en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11396en_AU
dc.identifier.volume32en_AU
dc.language.isoenen_AU
dc.publisherSpringer Nature Limiteden_AU
dc.subjectDieten_AU
dc.subjectEnvironmenten_AU
dc.subjectFooden_AU
dc.subjectStable isotopesen_AU
dc.subjectWetlandsen_AU
dc.subjectFishesen_AU
dc.subjectAustraliaen_AU
dc.subjectOrganic matteren_AU
dc.subjectAlgaeen_AU
dc.subjectInsectsen_AU
dc.subjectWateren_AU
dc.titleTrophic shifts involving native and exotic fish during hydrologic recession in floodplain wetlandsen_AU
dc.typeJournal Articleen_AU
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