Authors / CoAuthors
Radke, L.C. | Webber, E.
Abstract
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 co-located 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 wave-generated currents. Data and samples were acquired using the Defence Science & 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 128 sample data set comprises major, minor and trace elements derived from x-ray fluorescence analysis of surface seabed sediments (~0-2 cm). Sediment surface area data are also presented. More Information: Radke, L.C., Huang, Z., Przeslawski, R., Webster, I.T., McArthur, M.A., Anderson, T.J., P.J. Siwabessy, Brooke, B. 2011. Including biogeochemical factors and a temporal component in benthic habitat maps: influences on infaunal diversity in a temperate embayment. Marine and Freshwater Research 62 (12): 1432 - 1448. Huang, Z., McArthur, M., Radke, L., Anderson, T., Nichol, S., Siwabessy, J. and Brooke, B. 2012. Developing physical surrogates for benthic biodiversity using co-located samples and regression tree models: a conceptual synthesis for a sandy temperature embayment. International Journal of Geographical Information Science DOI:10.1080/13658816.2012.658808.
Product Type
dataset
eCat Id
79255
Contact for the resource
Custodian
Owner
Custodian
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Digital Object Identifier
Keywords
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- Marine Data
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- coasts
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- habitat
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- marine biodiversity
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- geochemistry
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- mapping
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- CERF
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- marine
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- ACT
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Marine Geoscience
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- Published_External
Publication Date
2014-01-01T00:00:00
Creation Date
Security Constraints
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Status
Purpose
Maintenance Information
asNeeded
Topic Category
oceans
Series Information
Lineage
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 wash-out of fine sediment during retrieval to the surface. The surface sediments (~0-2 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 freeze-dried and ground in a PSZ mill, after first removing a sub-sample (unground) for surface area analysis. Major and trace elements were determined by X-ray fluorescence at Geoscience Australia using a Phillips PW204 4kW sequential spectrometer. Surface areas were determined using a 5-point Brunauer-Emmett-Teller (BET) adsorption isotherm on a Quantachrome NOVA 2200e analyser, with nitrogen used as the adsorbate. The samples were first cleaned of organic matter by slow heating for 12 hours to 350oC. Data quality is moderate (+/- 10%). A C-NAV system was used to provide geographical position with a manufacturer accuracy of 10 cm RMS. Acknowledgments: 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), Matthew Carey, Peter Harris, Mike Hughes, Jodie Smith and Anna Potter provided field support. Billie Poignand and Kylia Wall dried and ground these samples, while Tony Watson undertook the surface area analysis and Liz Webber undertook the XRF analysis. This dataset is also available online via the OzCoasts (www.ozcoasts.org.au) and MARS (http://www.ga.gov.au/oracle/mars/) databases.
Parent Information
Extents
[-35.13, -35.0, 150.67725, 150.78]
Reference System
Spatial Resolution
Service Information
Associations
Source Information
Data sources not available