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Organic biomarkers to describe the major carbon inputs and cycling of organic matter in the central Great Barrier Reef region

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dc.contributor Australian Institute Of Marine Science
dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science (aims) en BRINKMAN, DIANE BURNS, KATHRYN 2017-03-21T01:21:04Z 2013-02-28T06:52:57Z 2017-03-21T01:21:04Z 2019-05-09T01:24:16Z 2013-02-28T06:52:57Z 2013-02-28T06:52:57Z 2017-03-21T01:21:04Z 2019-05-09T01:24:16Z 2011-06-10
dc.identifier 8825 en
dc.identifier.citation Burns KA and Brinkman DL (2011) Organic biomarkers to describe the major carbon inputs and cycling of organic matter in the central Great Barrier Reef region. Estuarine Coastal and Shelf Science. 93: 132-141. en
dc.identifier.issn 0272-7714
dc.description Link to abstract/full text - en
dc.description.abstract Controversy surrounds the sources and transport of land derived pollutants in the Great Barrier Reef ecosystem because there is insufficient knowledge of the mechanism of movement of organic contaminants and the cycling of organic matter in this dynamic system. Thus a sediment and sediment trap study was used to describe the composition of resuspended and surface sediments in the south central Great Barrier Reef and its lagoon. This region is characterised by strong tides (6-8 m at Mackay) and trade winds regularly about 15-20 knots. A series of organic biomarkers detailed the cyclical processes of sediment resuspension, recolonising with marine algae and bacteria, packaging into zooplankton faecal pellets and resettlement to sediments where the organics undergo further diagenesis. With each cycle the inshore sediments are diluted with CaCO(3) reef sediments and moved further offshore with the strong ebb tide currents. This results in transport of land derived materials offshore and little storage of organic materials in the lagoon or reef sediments. These processes were detailed by inorganic measurements such as %CaCO(3) and Al/Ca ratios, and by the compositions of hydrocarbon, sterol, alcohol, and fatty acid lipid fractions. Persistent contaminants such as coal dust from a coastal loading facility can be detected in high concentration inshore and decreasing out to the shelf break at 180 m approximately 40 nautical miles offshore. The normal processes would likely be amplified during cyclonic and other storms. The lipids show the sources of carbon to include diatoms and other phytoplankton, creanaerchaeota, sulfate reducing and other bacteria, land plants including mangrove leaves, plus coal dust and other petroleum contaminants. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
dc.description.uri en
dc.language English
dc.language en en
dc.relation.ispartof Null
dc.relation.ispartof Estuarine Coastal and Shelf Science - pages: 93: 132-141 en
dc.relation.isreferencedby Link to Metadata Record - en
dc.relation.uri en
dc.subject Great Barrier Reef
dc.subject Marine-sediments
dc.subject Carbon Cycling
dc.subject Ionization-mass-spectrometry
dc.subject North Pacific-ocean
dc.subject Sediment Transport
dc.subject Ancient Sediments
dc.subject Biomarkers
dc.subject Particulate Matter
dc.subject Subsurface Intrusions
dc.subject Lipids
dc.subject Fatty-acids
dc.subject Tetraether Lipids
dc.subject Marine & Freshwater Biology
dc.subject Continental-shelf
dc.subject Oceanography
dc.subject Seasonal-variations
dc.title Organic biomarkers to describe the major carbon inputs and cycling of organic matter in the central Great Barrier Reef region
dc.type journal article en
dc.identifier.doi 10.1016/j.ecss.2011.04.001
dc.identifier.wos WOS:000291907500005

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