Journal articles on the topic 'Coorong lagoon'

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1

Hossain, M. A., Q. Ye, S. C. Leterme, and J. G. Qin. "Spatial and temporal changes of three prey-fish assemblage structure in a hypersaline lagoon: the Coorong, South Australia." Marine and Freshwater Research 68, no. 2 (2017): 282. http://dx.doi.org/10.1071/mf15212.

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Estuaries and coastal lagoons are the dynamic interface among marine, freshwater and terrestrial environments. The Coorong, an Australian wetland, has been ecologically degraded by protracted drought and subsequent low freshwater flow, and transformed into a hyper-saline lagoon system. The Coorong consists of the North and South lagoons and connects to the Southern Ocean through a narrow channel at Murray Estuary. The present study investigated spatiotemporal variation of three primary prey-fish assemblage in the Murray Estuary and Coorong. Spatial change in prey-fish assemblage was detected, but temporal variation was not obvious. Prey-fish assemblage was dominated by greater abundance of small-mouth hardyhead (Atherinosoma microstoma) in the South Lagoon. There was low abundance of sandy sprat (Hyperlophus vittatus) and Tamar goby (Afurcagobius tamarensis) in North Lagoon, and complete absence of both species in South Lagoon. The spatial variation in the distribution of prey-fish assemblage was attributed to elevated salinity gradients (Murray Estuary: 2–30; North Lagoon: 11–75; and South Lagoon: 40–85). The change of prey-fish assemblage is mainly driven by the salinity variation in the Murray Estuary and Coorong. The present study has improved our understanding on the dynamics of small-bodied prey-fish assemblage and key environmental factors regulating fish distribution in the Murray Estuary and Coorong.
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2

L Groome, Roger. "At the End of the River: The Coorong and Lower Lakes." Pacific Conservation Biology 16, no. 4 (2010): 290. http://dx.doi.org/10.1071/pc110290.

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This is a marvelous text (29 cm X 23 cm, 247 pp) on the Coorong and other waters at the mouth of the Murray River in South Australia, their social and environmental values, and the problems which beset them. The Coorong itself is an unusual 110 kilometers long but narrow lagoon, running southeast along the coast from the Murray mouth. Authored principally by Associate Professor David Paton of the University of Adelaide, the text also contains vignettes by 22 other contributors. Its ten chapter are illustrated by 150 colour photographs (no less than 35 photographers contributed) and 35 are so delightful sketches. Almost 300 references are included, plus 50 tables and diagrams.
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3

Palinska, Katarzyna A., Joachim Scholz, Katja Sterflinger, Gisela Gerdes, and Yvonne Bone. "Microbial mats associated with bryozoans (Coorong Lagoon, South Australia)." Facies 41, no. 1 (December 1999): 1–14. http://dx.doi.org/10.1007/bf02537456.

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4

Bone, Y., and R. E. Wass. "Sub‐Recent bryozoan‐serpulid buildups in the Coorong lagoon, South Australia." Australian Journal of Earth Sciences 37, no. 2 (June 1, 1990): 207–14. http://dx.doi.org/10.1080/08120099008727921.

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5

Lower, C. S., J. H. Cann, and D. Haynes. "Microfossil evidence for salinity events in the Holocene Coorong Lagoon, South Australia." Australian Journal of Earth Sciences 60, no. 5 (July 2013): 573–87. http://dx.doi.org/10.1080/08120099.2013.823112.

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6

Cann, J. H., and C. V. Murray-Wallace. "Interstadial age (MIS5c) beach-dune barrier deposits in the Coorong Lagoon, South Australia." Australian Journal of Earth Sciences 59, no. 8 (December 2012): 1127–34. http://dx.doi.org/10.1080/08120099.2012.727869.

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7

Kingsford, Richard T., Keith F. Walker, Rebecca E. Lester, William J. Young, Peter G. Fairweather, Jesmond Sammut, and Michael C. Geddes. "A Ramsar wetland in crisis - the Coorong, Lower Lakes and Murray Mouth, Australia." Marine and Freshwater Research 62, no. 3 (2011): 255. http://dx.doi.org/10.1071/mf09315.

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The state of global freshwater ecosystems is increasingly parlous with water resource development degrading high-conservation wetlands. Rehabilitation is challenging because necessary increases in environmental flows have concomitant social impacts, complicated because many rivers flow between jurisdictions or countries. Australia’s Murray–Darling Basin is a large river basin with such problems encapsulated in the crisis of its Ramsar-listed terminal wetland, the Coorong, Lower Lakes and Murray Mouth. Prolonged drought and upstream diversion of water dropped water levels in the Lakes below sea level (2009–2010), exposing hazardous acid sulfate soils. Salinities increased dramatically (e.g. South Lagoon of Coorong >200 g L–1, cf. modelled natural 80 g L–1), reducing populations of waterbirds, fish, macroinvertebrates and littoral plants. Calcareous masses of estuarine tubeworms (Ficopomatus enigmaticus) killed freshwater turtles (Chelidae) and other fauna. Management primarily focussed on treating symptoms (e.g. acidification), rather than reduced flows, at considerable expense (>AU$2 billion). We modelled a scenario that increased annual flows during low-flow periods from current levels up to one-third of what the natural flow would have been, potentially delivering substantial environmental benefits and avoiding future crises. Realisation of this outcome depends on increasing environmental flows and implementing sophisticated river management during dry periods, both highly contentious options.
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8

Bone, Y. "Geological note: Population explosion of the bryozoanmembranipora aciculatain the Coorong Lagoon in late 1989." Australian Journal of Earth Sciences 38, no. 1 (February 1991): 121–23. http://dx.doi.org/10.1080/08120099108727960.

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9

Cann, John H., Robert P. Bourman, and Elizabeth J. Barnett. "Holocene Foraminifera as Indicators of Relative Estuarine-Lagoonal and Oceanic Influences in Estuarine Sediments of the River Murray, South Australia." Quaternary Research 53, no. 3 (May 2000): 378–91. http://dx.doi.org/10.1006/qres.2000.2129.

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AbstractIn southeastern South Australia, the River Murray debouches through a coastal barrier separating euryhaline estuarine-lagoonal waters from the Southern Ocean. Depending upon the relative freshwater outflow of the river and ingress of the ocean, water salinity varies greatly within the lower estuary. Ammonia beccarii and Elphidium articulatum are euryhaline species of foraminifera that characterize the estuary and back-barrier Coorong Lagoon. The inner-shelf marine environment hosts an assemblage in which Discorbis dimidiatus, E. crispum, E. macelliforme, and various cibicidid species predominate. In cored sediments recovered from the shallow lower estuary, the relative abundance of A. beccarii + E. articulatum was compared with that of D. dimidiatus + E. crispum + E. macelliforme + other species. These data, and AMS radiocarbon ages determined for foraminifera and ostracods, provide evidence of a change from maximum oceanic influence (5255 ± 60 yr B.P.) to maximum estuarine influence (3605 ± 70 yr B.P.). Over this same time interval, sea level fell relatively by about 2 m. However, the event was also contemporaneous with falling water levels in several Victorian lakes, and it is thus attributed to onset of climatic aridity. Reduced precipitation in the River Murray catchment and reduced freshwater outflow enhanced development of the flood-tide delta and constriction of the mouth.
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10

Pollet, Thomas, Mathilde Schapira, Marie-Jeanne Buscot, Sophie C. Leterme, James G. Mitchell, and Laurent Seuront. "Prokaryotic aminopeptidase activity along a continuous salinity gradient in a hypersaline coastal lagoon (the Coorong, South Australia)." Saline Systems 6, no. 1 (2010): 5. http://dx.doi.org/10.1186/1746-1448-6-5.

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11

Webster, Ian T. "The hydrodynamics and salinity regime of a coastal lagoon – The Coorong, Australia – Seasonal to multi-decadal timescales." Estuarine, Coastal and Shelf Science 90, no. 4 (December 2010): 264–74. http://dx.doi.org/10.1016/j.ecss.2010.09.007.

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12

Jeffries, T. C., J. R. Seymour, K. Newton, R. J. Smith, L. Seuront, and J. G. Mitchell. "Increases in the abundance of microbial genes encoding halotolerance and photosynthesis along a sediment salinity gradient." Biogeosciences Discussions 8, no. 4 (July 28, 2011): 7551–74. http://dx.doi.org/10.5194/bgd-8-7551-2011.

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Abstract. Biogeochemical cycles are driven by the metabolic activity of microbial communities, yet the environmental parameters that underpin shifts in the functional potential coded within microbial community genomes are still poorly understood. Salinity is one of the primary determinants of microbial community structure and can vary strongly along gradients within a variety of habitats. To test the hypothesis that shifts in salinity will also alter the bulk biogeochemical potential of aquatic microbial assemblages, we generated four metagenomic DNA sequence libraries from sediment samples taken along a continuous, natural salinity gradient in the Coorong lagoon, Australia, and compared them to physical and chemical parameters. A total of 392483 DNA sequences obtained from four sediment samples were generated and used to compare genomic characteristics along the gradient. The most significant shifts along the salinity gradient were in the genetic potential for halotolerance and photosynthesis, which were more highly represented in hypersaline samples. At these sites, halotolerance was achieved by an increase in genes responsible for the acquisition of compatible solutes – organic chemicals which influence the carbon, nitrogen and methane cycles of sediment. Photosynthesis gene increases were coupled to an increase in genes matching Cyanobacteria, which are responsible for mediating CO2 and nitrogen cycles. These salinity driven shifts in gene abundance will influence nutrient cycles along the gradient, controlling the ecology and biogeochemistry of the entire ecosystem.
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13

Jeffries, T. C., J. R. Seymour, K. Newton, R. J. Smith, L. Seuront, and J. G. Mitchell. "Increases in the abundance of microbial genes encoding halotolerance and photosynthesis along a sediment salinity gradient." Biogeosciences 9, no. 2 (February 20, 2012): 815–25. http://dx.doi.org/10.5194/bg-9-815-2012.

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Abstract. Biogeochemical cycles are driven by the metabolic activity of microbial communities, yet the environmental parameters that underpin shifts in the functional potential coded within microbial community genomes are still poorly understood. Salinity is one of the primary determinants of microbial community structure and can vary strongly along gradients within a variety of habitats. To test the hypothesis that shifts in salinity will also alter the bulk biogeochemical potential of aquatic microbial assemblages, we generated four metagenomic DNA sequence libraries from sediment samples taken along a continuous, natural salinity gradient in the Coorong lagoon, Australia, and compared them to physical and chemical parameters. A total of 392483 DNA sequences obtained from four sediment samples were generated and used to compare genomic characteristics along the gradient. The most significant shifts along the salinity gradient were in the genetic potential for halotolerance and photosynthesis, which were more highly represented in hypersaline samples. At these sites, halotolerance was achieved by an increase in genes responsible for the acquisition of compatible solutes – organic chemicals which influence the carbon, nitrogen and methane cycles of sediment. Photosynthesis gene increases were coupled to an increase in genes matching Cyanobacteria, which are responsible for mediating CO2 and nitrogen cycles. These salinity driven shifts in gene abundance will influence nutrient cycles along the gradient, controlling the ecology and biogeochemistry of the entire ecosystem.
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14

Lam-Gordillo, Orlando, Luke M. Mosley, Stuart L. Simpson, David T. Welsh, and Sabine Dittmann. "Loss of benthic macrofauna functional traits correlates with changes in sediment biogeochemistry along an extreme salinity gradient in the Coorong lagoon, Australia." Marine Pollution Bulletin 174 (January 2022): 113202. http://dx.doi.org/10.1016/j.marpolbul.2021.113202.

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15

Tulipani, Svenja, Kliti Grice, Evelyn Krull, Paul Greenwood, and Andrew T. Revill. "Salinity variations in the northern Coorong Lagoon, South Australia: Significant changes in the ecosystem following human alteration to the natural water regime." Organic Geochemistry 75 (October 2014): 74–86. http://dx.doi.org/10.1016/j.orggeochem.2014.04.013.

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16

Kim, D. H., K. T. Aldridge, J. D. Brookes, and G. G. Ganf. "The effect of salinity on the germination of Ruppia tuberosa and Ruppia megacarpa and implications for the Coorong: A coastal lagoon of southern Australia." Aquatic Botany 111 (November 2013): 81–88. http://dx.doi.org/10.1016/j.aquabot.2013.06.008.

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17

Chamberlayne, Briony K., Jonathan J. Tyler, and Bronwyn M. Gillanders. "Elemental concentrations of waters and bivalves in the fresh to hypersaline Coorong Lagoons, South Australia: Implications for palaeoenvironmental studies." Estuarine, Coastal and Shelf Science 255 (July 2021): 107354. http://dx.doi.org/10.1016/j.ecss.2021.107354.

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18

Wedderburn, Scotte D., Colin P. Bailey, Steven Delean, and David C. Paton. "Population and osmoregulatory responses of a euryhaline fish to extreme salinity fluctuations in coastal lagoons of the Coorong, Australia." Estuarine, Coastal and Shelf Science 168 (January 2016): 50–57. http://dx.doi.org/10.1016/j.ecss.2015.11.015.

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19

Clara, Inês, Brenda Dyack, John Rolfe, Alice Newton, Darien Borg, Ramunas Povilanskas, and Ana C. Brito. "The value of coastal lagoons: Case study of recreation at the Ria de Aveiro, Portugal in comparison to the Coorong, Australia." Journal for Nature Conservation 43 (June 2018): 190–200. http://dx.doi.org/10.1016/j.jnc.2017.10.012.

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20

Michalík, Jozef, Otília Lintnerová, Patrycja Wójcik-Tabol, Andrzej Gaździcki, Jacek Grabowski, Marián Golej, Vladimír Šimo, and Barbara Zahradníková. "Paleoenvironments during the Rhaetian transgression and the colonization history of marine biota in the Fatric Unit (Western Carpathians)." Geologica Carpathica 64, no. 1 (February 1, 2013): 39–62. http://dx.doi.org/10.2478/geoca-2013-0003.

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Abstract Terminal Triassic environmental changes are characterized by an integrated study of lithology, litho- and cyclostratigraphy, paleontology, mineralogy, geochemistry and rock magnetism in the Tatra Mts. The Carpathian Keuper sequence was deposited in an arid environment with only seasonal rivers, temporal lakes and swamps with scarce vegetation. Combination of a wide range of δ18O values (-0.7 to + 2.7) with negative δ13C values documents dolomite precipitation either from brackish or hypersaline lake water, or its derivation from pore water comparably to the Recent Coorong B-dolostone. Negative δ13C values indicate microbial C productivity. Rhaetian transgressive deposits with restricted Rhaetavicula fauna accumulated in nearshore swamps and lagoons. Associations of foraminifers, bivalves and sharks in the Zliechov Basin were controlled by physical factors. Bivalve mollusc biostromes were repetitively destroyed by storms, and temporary firm bottoms were colonized by oysters and burrowers. Subsequent black shale deposition recorded input of eolian dust. Bottom colonization by pachyodont bivalves, brachiopod and corals started much later, during highstand conditions. Facies evolution also revealed by geochemical data, C and O isotope curves reflect eustatic and climatic changes and help reconstruct the evolution of Rhaetian marine carbonate ramp. The Fatra Formation consists of 100 kyr eccentricity and 40 kyr obliquity cycles; much finer rhythmicity may record monsoonlike climatic fluctuations. Fluvial and eolian events were indicated by analysis of grain size and content of clastic quartz, concentrations of foraminiferal (Agathammina) tests in thin laminae indicates marine ingression events. Magnetic susceptibility (MS) variations reflect the distribution of authigenic and detrital constituents in the sequence. Increasing trend of MS correlates with the regressive Carpathian Keuper sequence and culminates within the bottom part of the Fatra Formation. Decreasing trend of MS is observed upwards the transgressive deposits of the Fatra Formation.
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21

Priestley, Stacey C., Jonathan Tyler, Savannah R. Liebelt, Luke M. Mosley, Wei Wen Wong, Yuexiao Shao, Zara Woolston, et al. "N and C Isotope Variations Along an Extreme Eutrophication and Salinity Gradient in the Coorong Lagoon, South Australia." Frontiers in Earth Science 9 (February 14, 2022). http://dx.doi.org/10.3389/feart.2021.727971.

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The Coorong Lagoon is a unique hydrological and depositional system at the terminus of the Murray–Darling Basin, the largest river system in Australia. It exhibits large salinity, nutrient, and organic matter gradients, providing a modern analogue to study and validate the use of δ15N and δ13C as tracers of past and contemporary geochemical cycles in estuarine environments. To this end, water and surface sediment samples were analyzed for particulate organic nitrogen (PON) and carbon (POC) concentrations, and the respective δ15N and δ13C signatures of particulate nitrogen and carbon. PON and POC exhibited positive relationships to chlorophyll-a, indicating the dominance of phytoplankton production upon suspended organic matter. There was also a general trend of increasing δ15N of PON (δ15NPON) values and decreasing δ13C of particulate carbon (δ13CPC) values with increasing salinity and eutrophication in the restricted South Lagoon. In a multiple linear regression for δ15NPON, the best two predictors in combination are PON and C:N molar ratio, highlighting the importance of productivity and the type or source of organic matter. For δ13CPC, the best two predictors are total dissolved phosphorus and latitude, suggesting influences from productivity and proximity to the ocean. Sediment δ15N values across the Coorong Lagoon overlap with the δ15NPON in the water column, suggesting that PON derived from algal material represents the main source of nitrogen to lagoon sediments. We hypothesize that limited N loss via denitrification leads to PON being recycled almost exclusively to ammonium, due to low rates of nitrification and dominance of dissimilatory nitrate reduction to ammonium (DNRA). We propose that preferential volatilization of 14N in ammonia increases the δ15N of ammonium assimilated by phytoplankton, thereby increasing the δ15N within suspended organic matter and surface sediment in the South Lagoon. By contrast, the gradient exhibited in δ13CPC data was countered by a relatively constant sedimentary organic carbon δ13C. Data from the Coorong, therefore, suggest that δ15N values in sediments can be used to infer palaeoproductivity in this hypereutrophic and hypersaline depositional environment, however, the measured δ13CPC may be influenced by δ13CDIC or preferential loss of 13C during sedimentation that alter the sedimentary δ13C record of organic carbon.
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22

Brookes, Justin D., Peisheng Huang, Sherry Y. Zhai, Matthew S. Gibbs, Qifeng Ye, Kane T. Aldridge, Brendan Busch, and Matthew R. Hipsey. "Environmental Flows to Estuaries and Coastal Lagoons Shape the Salinity Gradient and Generate Suitable Fish Habitat: Predictions From the Coorong, Australia." Frontiers in Environmental Science 10 (April 7, 2022). http://dx.doi.org/10.3389/fenvs.2022.796623.

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Freshwater flows to estuaries shape habitat, transport nutrients to drive productivity, and generate a salinity gradient that impacts water quality and provides spawning cues for fish. The aim of this study was to quantify how environmental flows improved outcomes for a coastal lagoon system (the Coorong, South Australia), considering the export, and prevention of ingress, of salt from the system, and the increased available habitat for key fish biota. A hydrodynamic model was used to simulate salinity and water temperature, and to determine the salt exchange between the Coorong and ocean for the observed conditions with environmental water release included. Scenario simulations showed that maintaining river flow is shown to arrest salt intrusion from the ocean into the Coorong. Without environmental water, the net import of salt into the Coorong would have been considerably greater, ranging between 1.86 million tonnes in 2018–19 to approximately 2.33 million tonnes in 2019–20. The fresher conditions created by environmental water provision supported a considerable expansion of suitable fish habitat area, derived from a simple habitat index based on salinity and water temperature. Without environmental water the habitat suitable for mulloway would have contracted by 38% over the 3 year investigation period. A similar trend is evident for black bream, Tamar goby, greenback flounder, yelloweye mullet, congolli and smallmouth hardyhead. The results highlighted the importance of cumulative benefits from delivering environmental water over multiple years, with different results obtained if the environmental water provided regularly or just focused over a single year. The approach used in this work to relate hydrological changes from water management to indicators of habitat suitability through changes to physical attributes provides information to inform the evaluation of environmental watering, as well as a tool to support future decision making to maximise the benefits from this precious resource.
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23

"Dynamic Assessment of Oceanic Connectivity in a Coastal Lagoon—the Coorong, Australia." Journal of Coastal Research 27, no. 1 (September 17, 2010): 131. http://dx.doi.org/10.2112/jcoastres-d-10-00079.1.

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