Authors / CoAuthors
Radke, L.C. | Trafford, J.
Abstract
This resource contains geochemistry data for the Oceanic Shoals Commonwealth Marine Reserve (CMR) in the Timor Sea collected by Geoscience Australia during September and October 2012 on RV Solander (survey GA0339/SOL5650). This dataset comprises total sediment metabolism (dissolved inorganic carbon production) measurments and DIC pools in the upper 2 cm of the seabed. The Oceanic Shoals Commonwealth Marine Reserve survey was undertaken as an activity within the Australian Government's National Environmental Research Program Marine Biodiversity Hub and was the key component of Research Theme 4 - Regional Biodiversity Discovery to Support Marine Bioregional Plans. Hub partners involved in the survey included the Australian Institute of Marine Science, Geoscience Australia, the University of Western Australia, Museum Victoria and the Museum and Art Gallery of the Northern Territory. Data acquired during the survey included: multibeam sonar bathymetry and acoustic backscatter; sub-bottom acoustic profiles; physical samples of seabed sediments, infauna and epibenthic biota; towed underwater video and still camera observations of seabed habitats; baited video observations of demersal and pelagic fish, and; oceanographic measurements of the water column from CTD (conductivity, temperature, depth) casts and from deployment of sea surface drifters. Further information on the survey is available in the post-survey report published as Geoscience Australia Record 2013/38 (Nichol et al. 2013): Nichol, S.L., Howard, F.J.F., Kool, J., Stowar, M., Bouchet, P., Radke, L., Siwabessy, J., Przeslawski, R., Picard, K., Alvarez de Glasby, B., Colquhoun, J., Letessier, T. & Heyward, A. 2013. Oceanic Shoals Commonwealth Marine Reserve (Timor Sea) Biodiversity Survey: GA0339/SOL5650 - Post Survey Report. Record 2013/38. Geoscience Australia: Canberra. (GEOCAT #76658).
Product Type
dataset
eCat Id
78798
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
- ( Theme )
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- marine biodiversity
- ( Theme )
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- marine park
- ( Theme )
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- geochemistry
- ( Theme )
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- continental shelf
- ( Theme )
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- seabed
- ( Theme )
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- NERP Marine Biodiversity Hub
- ( Theme )
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- marine
- ( Theme )
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- NERP
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- AU-WA
- 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
Legal Constraints
Status
Purpose
Maintenance Information
asNeeded
Topic Category
oceans
Series Information
Lineage
Bottom sediments were collected using either a Smith McIntyre grab or a Box Core. Surface sediment (0-2 cm) was syringed into falcon vials. Pore waters were removed within 20 minutes of collection, and salinity, temperature and pH measurements were taken. The pore waters were then filtered (0.45 µm) into 3 ml gas-tight vials (pre-charged with 0.025 HgCl2). The procedure was repeated on pore waters from a second bulk sample that was incubated for ~24 hrs at sea surface temperatures. Dissolved inorganic carbon (DIC) concentrations were determined using a DIC analyser and infrared-based CO2 detector. (Geoscience Australia). CO2 production rates were calculated by concentration differences over the incubation period, after correction for CaCO3 fluxes. The average %RSD of the precisions and accuracies of the dissolved inorganic carbon measurements were 1.1 +/-1.1%. The accuracy of the wet/dry weight used in the calculations were better than 1%. Thanks to the crew of the RV Solander for help with sample collection. DIC analyses were provided by R. Falkner and A. Taylor.
Parent Information
Extents
[-12.23, -11.3, 126.9, 127.46]
Reference System
Spatial Resolution
Service Information
Associations
Source Information
NERP Marine Biodiversity Hub