Chemical Diversity in South-eastern Australian Saline Lakes II: Biotic Implications
This study explores how differences in ionic composition of south-eastern Australian saline lake waters, caused by path differentiation according to the Eugster-Jones-Hardie models of solute evolution and halite recycling, influence species composition of ostracod faunas. Ostracod occurrences are reported as physiologically important ionic ratios set in a marine-meteoric framework, with chemical boundaries determined by mixing and evaporation models. The occurrence of halophilous ostracods coincides with changes in the ionic structure of lake waters. Chemical diversity is found to be biologically important, with most ostracods preferring a specific pathway of the Eugster-Jones-Hardie models. Path preference predominantly reflects the different tolerance ranges of species to a combination of Na<sup>+</sup>/H<sup>+</sup>, Na<sup>+</sup>/Ca<sup>2+</sup> and alkalinity/Cl<sup>-</sup> activity ratios, which probably govern acid-base balance and Na<sup>+</sup> and CA<sup>2+</sup> regulation. An Alkalinity/Cl<sup>-</sup> activity ratio of ~-2.3 corresponds to the main division in the ostracod data and reflects the abrupt change in alkalinity/Cl<sup>-</sup> ratios that occurs when a seawater-like solute matrix is diluted with a large amount of meteoric water (95%). Most halobiont ostracods occur in waters enriched with Na-Cl as a result of halite recycling. Evidence is presented that the same geochemical processes are relevant to other aquatic organisms (e.g. zooplankton, diatoms, insects) found in salt water.
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Identification info
- Date (Publication)
- 2003-01-01T00:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/69449
- Cited responsible party
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Role Organisation / Individual Name Details Author Radke, L.C.
1 Author Juggins, S.
2 Author Halse, S.A.
3 Author De Deckker, P.
4 Author Finston, T.
5
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Role Organisation / Individual Name Details Custodian EGD
Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
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External Publication
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Scientific Journal Paper
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- Theme
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water resources
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AU-SA
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AU-VIC
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- Australian and New Zealand Standard Research Classification (ANZSRC)
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Earth Sciences
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Published_External
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Creative Commons Attribution 4.0 International Licence
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CC-BY
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4.0
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Australian Government Security ClassificationSystem
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- 2018-11-01T00:00:00
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
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Related Product
Download the article from Marine and Freshwater Research, Vol 54, pp. 895-912. [PDF 468KB]
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Unknown
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External Publication
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
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urn:uuid/a05f7892-ed7a-7506-e044-00144fdd4fa6
- Title
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GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
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- Resource scope
- Non geographic dataset
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nonGeographicDataset
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Geoscience Australia - short identifier for metadata record with
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- Citation identifier
- eCatId/69449
- Date info (Revision)
- 2018-04-22T08:17:45
- Date info (Creation)
- 2009-08-26T00:00:00
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- https://pid.geoscience.gov.au/dataset/ga/122551