Late holocene evolution of the coastal and estuarine lakes of the Snowy River floodplain (SE Australia): salinity regimes, nutrient dynamics and anthropogenic impacts

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dc.contributor.authorMacGregor, Aen_AU
dc.contributor.authorGell, PAen_AU
dc.contributor.authorTibby, Jen_AU
dc.contributor.authorHarrison, JJen_AU
dc.contributor.authorJacobsen, GEen_AU
dc.contributor.authorHancock, Gen_AU
dc.date.accessioned2009-12-07T05:07:45Zen_AU
dc.date.accessioned2010-04-30T04:57:09Zen_AU
dc.date.available2009-12-07T05:07:45Zen_AU
dc.date.available2010-04-30T04:57:09Zen_AU
dc.date.issued2007-07en_AU
dc.date.statistics2007-07en_AU
dc.description.abstractCoastal lake and estuarine systems across south eastern Australia act as both sedimentary and biological amplifiers, and are more sensitive to cumulative catchment-driven hydrological change than previously recognised (see Tibby et al., this volume). Deciphering natural responses to climate change and geomorphology, and ensuing historical responses to catchment clearance and regulation reveals whether these systems now lie within pre-disturbance variability, and the extent to which anthropogenic change is unidirectional. A multi-proxy palaeoecological assessment of the terminal coastal and estuarine lakes of the Snowy River floodplain will be presented. The Snowy River is one of Australia’s hallmark river systems. Its catchment has been substantially modified since the mid 1800s. The ecological and water quality impacts of a major inter-basin transfer of up to 99% of its flow since the mid 1960s are poorly understood. Incorporating a diatom-water quality inference model, stable isotope and fossil pigment reconstruction, this study has examined (a) notions of variability in the progressive evolution of the system (b) how the records compare to that of a relatively un-impacted (control) system nearby (c) the influence of natural perturbations on the ecology of these lakes (with respect to salinity and nutrient status), as well as (d) the nature and timing of anthropogenic disturbance. Explained as a combination of land clearance, drainage practices, and more recently, substantial flow diversion in the Snowy River, recent water quality changes are as pronounced as any experienced through the Holocene. However, they have occurred at a rate faster than those brought on by past climatic or geomorphic change.en_AU
dc.description.sponsorshipInternational Union for Quaternary Researchen_AU
dc.identifier.citationMacGregor, A., Gell, P., Tibby, J., Harrison, J., Jacobsen, G. E., & Hancock, G. (2007). Late holocene evolution of the coastal and estuarine lakes of the Snowy River floodplain (SE Australia): salinity regimes, nutrient dynamics and anthropogenic impacts. International Union for Quaternary Research XVII Congress (INQUA) – “The Tropics: Heat Engine of the Quaternary”, 28th July – 3rd August 2007. Cairns, Australia: Cairns Convention Centre. In Quaternary International, 167-168, 256.en_AU
dc.identifier.conferenceenddate3 August 2017en_AU
dc.identifier.conferencenameInternational Union for Quaternary Research XVII Congress (INQUA) – “The Tropics: Heat Engine of the Quaternary”en_AU
dc.identifier.conferenceplaceCairns, Australiaen_AU
dc.identifier.conferencestartdate28 July 2017en_AU
dc.identifier.govdoc1044en_AU
dc.identifier.issn1040-6182en_AU
dc.identifier.journaltitleQuaternary Internationalen_AU
dc.identifier.pagination256en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/2610en_AU
dc.identifier.volume167-168en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectQuaternary perioden_AU
dc.subjectCoastal regionsen_AU
dc.subjectAquatic ecosystemsen_AU
dc.subjectAustraliaen_AU
dc.subjectSalinityen_AU
dc.subjectNutrientsen_AU
dc.titleLate holocene evolution of the coastal and estuarine lakes of the Snowy River floodplain (SE Australia): salinity regimes, nutrient dynamics and anthropogenic impactsen_AU
dc.typeConference Abstracten_AU
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