Data

Direct determination of organic carbon in modern reef sediments and calcareous organisms from the central Great Barrier Reef

Name: Direct determination of organic carbon in modern reef sediments and calcareous organisms from the central Great Barrier Reef
Published: 2026

Australian Institute of Marine Science

Australian Institute of Marine Science (AIMS)

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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://apps.aims.gov.au/metadata/view/32d9c412-b1c4-408c-af60-220aba86172f&rft.title=Direct determination of organic carbon in modern reef sediments and calcareous organisms from the central Great Barrier Reef&rft.identifier=https://apps.aims.gov.au/metadata/view/32d9c412-b1c4-408c-af60-220aba86172f&rft.publisher=Australian Institute of Marine Science (AIMS)&rft.description=Over 200 modern sediment samples were obtained from nearshore stations in Bowling Green Bay and stations located across the inner and middle shelf regions of the central Great Barrier Reef. Surface sediments (0-1 cm) were collected using a frame-supported Van Veen grab sampler, then transferred to glass jars and stored frozen. Vibrocore samples were collected in August 1984 from the lagoon of Davies Reef. Samples of different species of the calcareous algae Halimeda were collected from the reef front at Davies Reef. All frozen samples were later freeze dried and homogenized in an agate ring mill. Halimeda samples were ground using a mortar and pestle.Measurements were conducted using a Beckman Tocamaster Model 915B total carbon analyser which simultaneously measures dissolved and particulate organic carbon. The samples were syringe-injected into a stream of oxygen and swept into a catalytic combustion tube held at 950°C. All carbonaceous material is oxidized to CO2, which was then swept into a nondispersive infrared analyzer sensitized to measure CO2. The transient CO2 present was directly proportional to total carbon in sample. The presence of relatively large amounts of carbonates, predominantly aragonite and high magnesium calcite in Recent coral reef sediments is a serious problem for many analytical techniques routinely used in the determination of organic carbon. This research was undertaken to develop an improved method for direct determination of organic carbon in calcareous marine sediments, organisms and particulate matter.Maintenance and Update Frequency: notPlannedStatement: Statement: Calcium carbonate, acid-washed silica sand (BDH, 40-100 mesh), potassium hydrogen phthallate and phosphoric acid were all AR grade. Humic acid (sodium salt) (36.7% C) was obtained from Aldrich Chemical Co. Coal (75.43% C) was obtained from the Standards Association of Australia. Organic carbon-free water was prepared by distillation from acid potassium permanganate treated distilled water. Ultra-high purity oxygen (&rft.creator=Australian Institute of Marine Science (AIMS) &rft.date=2026&rft.coverage=westlimit=147.649581; southlimit=-18.819378; eastlimit=147.649581; northlimit=-18.819378&rft.coverage=westlimit=147.649581; southlimit=-18.819378; eastlimit=147.649581; northlimit=-18.819378&rft.coverage=westlimit=147.228339; southlimit=-19.356961; eastlimit=147.228339; northlimit=-19.356961&rft.coverage=westlimit=147.228339; southlimit=-19.356961; eastlimit=147.228339; northlimit=-19.356961&rft_rights=Creative Commons Attribution-NonCommercial 3.0 Australia License http://creativecommons.org/licenses/by-nc/3.0/au/&rft_rights=Use Limitation: All AIMS data, products and services are provided as is and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.&rft_rights=Attribution: Format for citation of metadata sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: Australian Institute of Marine Science (AIMS). (2011). Direct determination of organic carbon in modern reef sediments and calcareous organisms from the central Great Barrier Reef. https://apps.aims.gov.au/metadata/view/32d9c412-b1c4-408c-af60-220aba86172f, accessed[date-of-access].&rft_rights=Resource Usage:Use of the AIMS data is for not-for-profit applications only. All other users shall seek permission for use by contacting AIMS. Acknowledgements as prescribed must be clearly set out in the user's formal communications or publications.&rft_subject=oceans&rft.type=dataset&rft.language=English Access the data

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Creative Commons Attribution-NonCommercial 3.0 Australia License
http://creativecommons.org/licenses/by-nc/3.0/au/

Use Limitation: All AIMS data, products and services are provided "as is" and AIMS does not warrant their fitness for a particular purpose or non-infringement. While AIMS has made every reasonable effort to ensure high quality of the data, products and services, to the extent permitted by law the data, products and services are provided without any warranties of any kind, either expressed or implied, including without limitation any implied warranties of title, merchantability, and fitness for a particular purpose or non-infringement. AIMS make no representation or warranty that the data, products and services are accurate, complete, reliable or current. To the extent permitted by law, AIMS exclude all liability to any person arising directly or indirectly from the use of the data, products and services.

Attribution: Format for citation of metadata sourced from Australian Institute of Marine Science (AIMS) in a list of reference is as follows: "Australian Institute of Marine Science (AIMS). (2011). Direct determination of organic carbon in modern reef sediments and calcareous organisms from the central Great Barrier Reef. https://apps.aims.gov.au/metadata/view/32d9c412-b1c4-408c-af60-220aba86172f, accessed[date-of-access]".

Resource Usage:Use of the AIMS data is for not-for-profit applications only. All other users shall seek permission for use by contacting AIMS. Acknowledgements as prescribed must be clearly set out in the user's formal communications or publications.

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Over 200 modern sediment samples were obtained from nearshore stations in Bowling Green Bay and stations located across the inner and middle shelf regions of the central Great Barrier Reef. Surface sediments (0-1 cm) were collected using a frame-supported Van Veen grab sampler, then transferred to glass jars and stored frozen. Vibrocore samples were collected in August 1984 from the lagoon of Davies Reef. Samples of different species of the calcareous algae Halimeda were collected from the reef front at Davies Reef. All frozen samples were later freeze dried and homogenized in an agate ring mill. Halimeda samples were ground using a mortar and pestle.Measurements were conducted using a Beckman Tocamaster Model 915B total carbon analyser which simultaneously measures dissolved and particulate organic carbon. The samples were syringe-injected into a stream of oxygen and swept into a catalytic combustion tube held at 950°C. All carbonaceous material is oxidized to CO2, which was then swept into a nondispersive infrared analyzer sensitized to measure CO2. The transient CO2 present was directly proportional to total carbon in sample.
The presence of relatively large amounts of carbonates, predominantly aragonite and high magnesium calcite in Recent coral reef sediments is a serious problem for many analytical techniques routinely used in the determination of organic carbon. This research was undertaken to develop an improved method for direct determination of organic carbon in calcareous marine sediments, organisms and particulate matter.

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Maintenance and Update Frequency: notPlanned

Statement: Statement: Calcium carbonate, acid-washed silica sand (BDH, 40-100 mesh), potassium hydrogen phthallate and phosphoric acid were all AR grade. Humic acid (sodium salt) (36.7% C) was obtained from Aldrich Chemical Co. Coal (75.43% C) was obtained from the Standards Association of Australia. Organic carbon-free water was prepared by distillation from acid potassium permanganate treated distilled water. Ultra-high purity oxygen (

Notes

Credit
Sandstrom, Mark W, Dr (Principal Investigator)

Modified: 25 09 2026

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text: westlimit=147.649581; southlimit=-18.819378; eastlimit=147.649581; northlimit=-18.819378

text: westlimit=147.228339; southlimit=-19.356961; eastlimit=147.228339; northlimit=-19.356961

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Other Information

Direct determination of organic carbon in modern reef sediments and calcareous organisms after dissolution of carbonate: Sandstrom MW, Tirendi F and Nott A (1986) Direct determination of organic carbon in modern reef sediments and calcareous organisms after dissolution of carbonate. Marine Geology 70: 321-329.

local : articleId=1947

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Identifiers

global : 32d9c412-b1c4-408c-af60-220aba86172f