Data

Biophysical Processes in the Torres Strait Marine Ecosystem 2004

Australian Ocean Data Network
CSIRO O&A Data Centre (QLD), (Point of contact) CSIRO O&A, Information & Data Centre (Point of contact) CSIRO Oceans & Atmosphere - Dutton Park (Associated with) CSIRO Oceans & Atmosphere - Hobart (Associated with)
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://marlin.csiro.au/geonetwork/srv/eng/catalog.search#/metadata/e06810a0-34c0-431e-e043-08114f8c95f2&rft.title=Biophysical Processes in the Torres Strait Marine Ecosystem 2004&rft.identifier=Anzlic Identifier: ANZCW0703009448&rft.publisher=Australian Ocean Data Network&rft.description=These data are the result of Geoscience Australia survey 266 to the central Torres Strait region, with the survey being the first of two by Geoscience Australia carried out in 2004. They form part of a larger field-based program managed by the Torres Strait CRC aimed at identifying and quantifying the principal physical and biological processes operating in Torres Strait. The impetus for the program is the threat of widespread seagrass dieback and its effects on local dugong and turtle populations and the implications for indigenous islander communities. The principal aim of the survey was to investigate the seabed geomorphology and sedimentary processes in the vicinity of Turnagain Island and to infer the possible effects (if any) on the distribution, abundance and survival of seagrasses. The Turnagain Island region was chosen because it is a known site of recent widespread seagrass dieback. The survey consisted of a detailed geophysical survey using swath (multi-beam) sonar and shallow seismic equipment that was supplemented with a detailed sampling program consisting of 301 near-bed water samples, 54 seabed grabs, 5 vibrocores and 69 camera stations. Four oceanographic moorings were also deployed for the duration of the survey to measure the local tide, wave and wind-driven currents. A regional survey was initially undertaken, followed by a detailed study of two areas: Area A - located approximately 2.5 km SW of Turnagain Island which contained sand ridges and seagrass beds, and Area B - located approximately 2.0 km SE of Turnagain Island which contained sandwaves and no seagrass beds.In a new application of the swath (multi-beam) data, the total volume of sediment transported during the survey was estimated from changes in the high-resolution seabed bathymetry collected during the repeat surveys.Preliminary results of the study found that seagrasses in the region are subject to frequent and significant changes in environmental conditions, with implications for limited dispersal and survival. A follow-up survey was undertaken in October 2004.Progress Code: completedMaintenance and Update Frequency: unknownStatement: All data was collected on the Survey between 28 March 2004 and 18 April 2004. Geophysical data was processed after the survey . Samples were analysed between July 2004 and October 2005. Metadata collated for the Torres Strait Inventory 2013 Project.&rft.creator=Anonymous&rft.date=2013&rft.coverage=westlimit=142; southlimit=-11; eastlimit=143; northlimit=-9; projection=WGS84&rft.coverage=westlimit=142; southlimit=-11; eastlimit=143; northlimit=-9; projection=WGS84&rft_rights=Sample metadata and analysis are available via the MARS database and web pages. www.ga.gov.au/oracle/mars. Multibeam, Subbottom profiler and oceanographic data collected. Oceanographic models. Survey Report available via Geoscience Australia sales centre. Biophysical Processes in theTorres Strait Marine Ecosystem - post cruise report. Geoscience Australia Record 2005/11.&rft_subject=biota&rft_subject=geoscientificInformation&rft_subject=Earth Science | Oceans | Bathymetry/Seafloor Topography | Seafloor Topography&rft_subject=Earth Science | Oceans | Coastal Processes | Sediment Transport&rft_subject=Earth Science | Oceans | Marine Sediments | Sediment Transport&rft_subject=Earth Science | Oceans | Ocean Acoustics | Acoustic Reflectivity&rft_subject=Earth Science | Oceans | Tides | Tidal Currents&rft_subject=Acoustic Equipment/Echosounders&rft_subject=Cameras - Still - Underwater&rft_subject=Cameras - Video - Underwater&rft_subject=Digital Imaging (acquisition and/or analysis)&rft_subject=Grabs&rft_subject=Moored Instruments&rft_subject=SONAR&rft_subject=Underwater Surveys (acquisition and/or analysis)&rft_subject=Water Column Samplers&rft_subject=Marine Features (Australia) | Torres Strait, QLD&rft_subject=Torres Strait Research Repository 2013&rft_subject=Ship: James Kirby (RV)&rft.type=dataset&rft.language=English Access the data
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Sample metadata and analysis are available via the MARS database and web pages. www.ga.gov.au/oracle/mars.
Multibeam, Subbottom profiler and oceanographic data collected. Oceanographic models.
Survey Report available via Geoscience Australia sales centre.
Biophysical Processes in theTorres Strait Marine Ecosystem - post cruise report. Geoscience Australia Record 2005/11.

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Full description

These data are the result of Geoscience Australia survey 266 to the central Torres Strait region, with the survey being the first of two by Geoscience Australia carried out in 2004. They form part of a larger field-based program managed by the Torres Strait CRC aimed at identifying and quantifying the principal physical and biological processes operating in Torres Strait. The impetus for the program is the threat of widespread seagrass dieback and its effects on local dugong and turtle populations and the implications for indigenous islander communities. The principal aim of the survey was to investigate the seabed geomorphology and sedimentary processes in the vicinity of Turnagain Island and to infer the possible effects (if any) on the distribution, abundance and survival of seagrasses.

The Turnagain Island region was chosen because it is a known site of recent widespread seagrass dieback. The survey consisted of a detailed geophysical survey using swath (multi-beam) sonar and shallow seismic equipment that was supplemented with a detailed sampling program consisting of 301 near-bed water samples, 54 seabed grabs, 5 vibrocores and 69 camera stations. Four oceanographic moorings were also deployed for the duration of the survey to measure the local tide, wave and wind-driven currents. A regional survey was initially undertaken, followed by a detailed study of two areas: Area A - located approximately 2.5 km SW of Turnagain Island which contained sand ridges and seagrass beds, and Area B - located approximately 2.0 km SE of Turnagain Island which contained sandwaves and no seagrass beds.

In a new application of the swath (multi-beam) data, the total volume of sediment transported during the survey was estimated from changes in the high-resolution seabed bathymetry collected during the repeat surveys.

Preliminary results of the study found that seagrasses in the region are subject to frequent and significant changes in environmental conditions, with implications for limited dispersal and survival. A follow-up survey was undertaken in October 2004.

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Progress Code: completed
Maintenance and Update Frequency: unknown
Statement: All data was collected on the Survey between 28 March 2004 and 18 April 2004. Geophysical data was processed after the survey . Samples were analysed between July 2004 and October 2005. Metadata collated for the Torres Strait Inventory 2013 Project.

Notes

Credit
We thank the crew and master of the RV James Kirby for their dogged assistance throughout the survey. We are grateful of Prof. Bob Henderson (School of Earth Sciences, James Cook University) for permission to use the RV James Kirby and hire the shallow swath sonar, Chirper and vibrocoring equipment. We are indebted to Toshi Nakada (Torres Strait Regional Authority) for advice on indigenous issues and the Torres Strait Island community for their support of the survey. Financial support was provided by Geoscience Australia, Reef CRC, and Queensland Department of Primary Industry and Fisheries. Dr Alan Butler (CSIRO - Marine Research) provided guidance on survey design. Alex McLachlan, Neil Ramsay, Tony Watson, and Richard Brown of the sedimentology laboratory at Geoscience Australia managed all sample analyses and are thanked for their timely and efficient production of the texture and composition data. The video footage was edited by Jakob Harris (Geoscience Australia). The original report benefited from reviews by Drs Brendan Brooke and Phil O'Brien of Geoscience Australia.
Credit
Heap AD
Credit
Hemer M
Credit
Daniell J
Credit
Mathews E
Credit
Harris PT
Credit
Kerville S and O’Grady L.

Data time period: 2004-03-28 to 2004-04-18

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143,-9 143,-11 142,-11 142,-9 143,-9

142.5,-10

text: westlimit=142; southlimit=-11; eastlimit=143; northlimit=-9; projection=WGS84

Subjects
Acoustic Equipment/Echosounders | Cameras - Still - Underwater | Cameras - Video - Underwater | Digital Imaging (acquisition and/or analysis) | Earth Science | Oceans | Bathymetry/Seafloor Topography | Seafloor Topography | Earth Science | Oceans | Coastal Processes | Sediment Transport | Earth Science | Oceans | Marine Sediments | Sediment Transport | Earth Science | Oceans | Ocean Acoustics | Acoustic Reflectivity | Earth Science | Oceans | Tides | Tidal Currents | Grabs | Marine Features (Australia) | Torres Strait, QLD | Moored Instruments | SONAR | Ship: James Kirby (RV) | Torres Strait Research Repository 2013 | Underwater Surveys (acquisition and/or analysis) | Water Column Samplers | biota | geoscientificInformation |

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Other Information
Heap et al (2005) - Post Cruise Report (Data Link)

url : https://www.marine.csiro.au/data/trawler/download.cfm?file_id=2958

Original Metadata Link (ANZCW0703009448) (Documentation Link)

url : https://www.ga.gov.au/meta/ANZCW0703009448.html

Identifiers
  • Local : Anzlic Identifier: ANZCW0703009448
  • Local : Marlin Record Number: 14236
  • global : e06810a0-34c0-431e-e043-08114f8c95f2