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The effects of river run-off on water clarity across the central Great Barrier Reef

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dc.contributor Australian Institute Of Marine Science
dc.contributor Sch Geog Planning & Environm Management
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor University Of Queensland
dc.contributor Queensland University Of Technology (qut)
dc.contributor Ctr Trop Water & Aquat Ecosyst Res
dc.contributor Biophys Oceanog Grp
dc.contributor Univ Queensland
dc.contributor Australian Inst Marine Sci BRODIE, J. FABRICIUS, K. E. LOGAN, M. WEEKS, S. 2014-07-18T05:13:01Z 2017-03-21T00:54:58Z 2014-07-18T05:13:01Z 2019-05-09T01:04:05Z 2017-03-21T00:54:58Z 2014-07-18T05:13:01Z 2017-03-21T00:54:58Z 2019-05-09T01:04:05Z 2014-07-15
dc.identifier.citation Fabricius KE, Logan M, Weeks S, Brodie J (2014) The effects of river run-off on water clarity across the central Great Barrier Reef. Marine Pollution Bulletin 84(1-2): 191-200 en_US
dc.identifier.issn 0025-326X
dc.description.abstract Changes in water clarity across the shallow continental shelf of the central Great Barrier Reef were investigated from ten years of daily river load, oceanographic and MODIS-Aqua data. Mean photic depth (i.e., the depth of 10% of surface irradiance) was related to river loads after statistical removal of wave and tidal effects. Across the 25,000 km(2) area, photic depth was strongly related to river freshwater and phosphorus loads (R-2 = 0.65 and 0.51, respectively). In the six wetter years, photic depth was reduced by 19.8% and below water quality guidelines for 156 days, compared to 9 days in the drier years. After onset of the seasonal river floods, photic depth was reduced for on average 6-8 months, gradually returning to clearer baseline values. Relationships were strongest inshore and midshelf (similar to 12-80 km from the coast), and weaker near the chronically turbid coast. The data show that reductions in river loads would measurably improve shelf water clarity, with significant ecosystem health benefits. Crown Copyright (C) 2014 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (
dc.description.sponsorship We thank Marites Canto for help in processing the remote sensing data, and the NASA Ocean Biology Processing Group for both the SeaWiFS and MODIS-Aqua satellite-to-in situ matchups for the Secchi depth data. Many thanks to the State of Queensland's Department of Environment and Heritage Protection (DEHP) for providing the wave rider buoy data, the river flow and river nutrient load data, and the sea level observations data, and to the Bureau of Meteorology for providing the rainfall and wind data. Many thanks also to Eric Wolanski for numerous discussions and sharing ideas. The study was funded by the Australian Marine Institute of Marine Science, and the Australian Government's National Environmental Research Program (NERP) Tropical Ecosystems Hub.
dc.description.uri en_US
dc.language English
dc.language.iso en en_US
dc.publisher Elsevier Open Access en_US
dc.relation.ispartof Null
dc.rights Attribution 3.0 Australia *
dc.rights.uri *
dc.subject Generalized Additive Mixed Models
dc.subject River Floods
dc.subject Flood-plume
dc.subject Inner-shelf
dc.subject Environmental Sciences
dc.subject Lagoon
dc.subject Nutrient Runoff
dc.subject Marine & Freshwater Biology
dc.subject Suspended Sediment
dc.subject Fine Sediment
dc.subject Photic Depth
dc.subject Great Barrier Reef
dc.subject Turbidity
dc.subject Chlorophyll
dc.subject Coastal Waters
dc.subject Coral-reefs
dc.subject Australia
dc.subject Environmental Sciences & Ecology
dc.title The effects of river run-off on water clarity across the central Great Barrier Reef
dc.type journal article en_US
dc.identifier.doi 10.1016/j.marpolbul.2014.05.012
dc.identifier.wos WOS:000338804700035

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