Data

Organic geochemistry data for surface seabed sediments in Jervis Bay, NSW (August 2008 and February 2009)

Australian Ocean Data Network
CSIRO O&A, Information & Data Centre (Point of contact) Geoscience Australia Marine Data Manager, (Point of contact)
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This material is released under the Creative Commons Attribution 3.0 Australia Licence.

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Brief description

Geoscience Australia carried out marine surveys in Jervis Bay (NSW) in 2007, 2008 and 2009 (GA303, GA305, GA309, GA312) to map seabed bathymetry and characterise benthic environments through colocated sampling of surface sediments (for textural and biogeochemical analysis) and infauna, observation of benthic habitats using underwater towed video and stills photography, and measurement of ocean tides and wavegenerated currents. Data and samples were acquired using the Defence Science and Technology Organisation (DSTO) Research Vessel Kimbla. Bathymetric mapping, sampling and tide/wave measurement were concentrated in a 3x5 km survey grid (named Darling Road Grid, DRG) within the southern part of the Jervis Bay, incorporating the bay entrance. Additional sampling and stills photography plus bathymetric mapping along transits was undertaken at representative habitat types outside the DRG. This 50 sample data set comprises %TOC, %TN, TOC/TN ratios, and carbon and nitrogen isotopic ratios for surface (0.0 to 2.0 cm) sediments from Jervis Bay. This dataset is a contribution to the CERF Marine Biodiversity Hub.

Lineage

Progress Code: completed
Maintenance and Update Frequency: notPlanned
Statement: Bottom sediments were collected using a small Shipek type grab sampler.This device can collect an intact sample of sediment up to 5 cm by 12 cm in area and 5 cm thick. Upon triggering, the grab immediately covers the sample, which prevents washout of fine sediment during retrieval to the surface. The surface sediments (~0 to 2 cm) within the grab were spooned into falcon vials and the porewaters were removed by centrifugation (9000 rpm; 5 minutes). The samples were then frozen for transport to the laboratories at Geoscience Australia where they were freezedried, ground in a PSZ mill and decarbonated. The decarbonated powders were sent to Environmental Isotopes Pty Ltd (Sydney) for isotopic analysis by mass spectrometry.

Notes

Credit
Geoscience Australia unertook a series of field campaigns in Jervis Bay (Dec 2007 to present) as part of the Surrogates Program in the Commonwealth (Australia) Environmental Research Facilities (CERF) Marine Biodiversity Hub. Thanks are owning to a range of people for there generous contributions to this study. Scott Corson (the master of the M.V. Kimbla)
Credit
Matthew Carey
Credit
Peter Harris
Credit
Mike Hughes
Credit
Jodie Smith and Anna Potter provided field support. Billie Poignand and Kylia Wall prepared the samples for isotopic analysis. The isotopic analyses were undertaken at Environmental Isotopes Pty Ltd (Sydney) by Dr Anita Andrew. This dataset is also available online via the OzCoasts (www.ozcoasts.org.au) and MARS (http://www.ga.gov.au/oracle/mars/) databases.

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150.76,-35.09 150.76,-35.12 150.7126,-35.12 150.7126,-35.09 150.76,-35.09

150.7363,-35.105

text: westlimit=150.71260000000001; southlimit=-35.119999999999997; eastlimit=150.75999999999999; northlimit=-35.090000000000003

Subjects
Commonwealth Environment Research Facilities | oceans |

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Download dataset (.zip 842 KB) (Data Link)

uri : https://www.marine.csiro.au/datacentre/projects/cerf/Surrogates_Data_Delivered/geochemistry/geochemistry_jervis_bay.zip

Identifiers
  • Local : Marlin Record Number: 8917
  • global : bc1b3741-e76f-5039-e044-00144f7bc0f4