Palaeoecological evidence for sustained change in a shallow Murray River (Australia) floodplain lake: regime shift or press response

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dc.contributor.authorKattel, Gen_AU
dc.contributor.authorGell, PAen_AU
dc.contributor.authorZawadzki, Aen_AU
dc.contributor.authorBarry, LAen_AU
dc.date.accessioned2017-04-27T01:53:16Zen_AU
dc.date.available2017-04-27T01:53:16Zen_AU
dc.date.issued2017-02-01en_AU
dc.date.statistics2017-04-27en_AU
dc.description.abstractPaleolimnological techniques can reveal long-term perturbations and associated stable state transitions of lake ecosystems. However, such transitions are difficult to predict since changes to lake ecosystems can be abrupt or gradual. This study examined whether there were past transitions in the ecological regime of Kings Billabong, a shallow River Murray wetland in southeast Australia. A 94-cm-long core, covering c. 90 years of age, was analysed at 1 cm resolution for subfossil cladocerans, diatoms and other proxies. Prior to river regulation (c. 1930), the littoral to planktonic ratios of cladocerans and diatoms, and bulk sediment δ13C values were high, while the period from c. 1930 to c. 1970 experienced considerable changes to the wetland ecosystem. The abrupt nature of changes of planktonic cladocerans and diatoms, particularly after the onset of river regulation (1930s), was triggered by inundation, high rates of sedimentation and shifts in bulk sediment δ15N values. However, the transition of a once littoral-dominated community, to one favouring an increasingly turbid, plankton-dominated trophic condition following river regulation was relatively slow and lasted for decades. The progression to a new regime was likely delayed by the partial recovery of submerged plant communities and related internal dynamics.© 2016, Springer International Publishing Switzerland.en_AU
dc.identifier.citationKattel, G., Gell, P., zawadzki, A., & Barry, L. A. (2017). Palaeoecological evidence for sustained change in a shallow Murray River (Australia) floodplain lake: regime shift or press response?. Hydrobiologia, 787, 269-290. doi:10.1007/s10750-016-2970-9en_AU
dc.identifier.govdoc8049en_AU
dc.identifier.issn1573-5117en_AU
dc.identifier.journaltitleHydrobiologiaen_AU
dc.identifier.pagination269-290en_AU
dc.identifier.urihttps://doi.org/10.1007/s10750-016-2970-9en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/8633en_AU
dc.identifier.volume787en_AU
dc.language.isoenen_AU
dc.publisherSpringer Linken_AU
dc.subjectRiversen_AU
dc.subjectSustainable developmenten_AU
dc.subjectFloodsen_AU
dc.subjectLakesen_AU
dc.subjectIsotopesen_AU
dc.subjectWetlandsen_AU
dc.titlePalaeoecological evidence for sustained change in a shallow Murray River (Australia) floodplain lake: regime shift or press responseen_AU
dc.typeJournal Articleen_AU
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