Data

Photosynthesis and respiration in the ascidian, Didemnum molle, on the Great Barrier Reef

Name: Photosynthesis and respiration in the ascidian, Didemnum molle, on the 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/4ddb7c3d-9190-4042-94ec-0c9025e5ed6e&rft.title=Photosynthesis and respiration in the ascidian, Didemnum molle, on the Great Barrier Reef&rft.identifier=https://apps.aims.gov.au/metadata/view/4ddb7c3d-9190-4042-94ec-0c9025e5ed6e&rft.publisher=Australian Institute of Marine Science (AIMS)&rft.description=Photosynthesis and respiration of ascidian/algal symbiosis (Didemnum molle/Prochloron) was measured at 5 m over 24 h using an in situ respirometer at Heron Island. Several colonies were incubated within each of 3 chambers.Readings from a light sensor and oxygen probes were automatically logged and read to tape [no longer available] then averaged by computer. The rate of photosynthesis to respiration, and percent contribution of Prochloron to ascidian respiration (CPAR) was calculated. Due to cloud conditions at the time of incubations, irradience was also calculated as for idealised light conditions. Chlorophyll a content, wet and dry weights of colonies were calculated.Respiration rate was determined by Winkler titration using water samples taken from whole colonies of various sizes (g wet weight) incubated at Lizard Island (Great Barrier Reef) at 2m depth. Colonies were differentiated between white and brown. To determine the energy contribution of Prochloron to Didemnum molle from photosynthesis and respiration rates.Maintenance and Update Frequency: notPlanned&rft.creator=Australian Institute of Marine Science (AIMS) &rft.date=2026&rft.coverage=westlimit=151.94667; southlimit=-23.47316; eastlimit=151.94667; northlimit=-23.47316&rft.coverage=westlimit=151.94667; southlimit=-23.47316; eastlimit=151.94667; northlimit=-23.47316&rft.coverage=westlimit=145.46667; southlimit=-14.66667; eastlimit=145.46667; northlimit=-14.66667&rft.coverage=westlimit=145.46667; southlimit=-14.66667; eastlimit=145.46667; northlimit=-14.66667&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). (2010). Photosynthesis and respiration in the ascidian, Didemnum molle, on the Great Barrier Reef. https://apps.aims.gov.au/metadata/view/4ddb7c3d-9190-4042-94ec-0c9025e5ed6e, 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). (2010). Photosynthesis and respiration in the ascidian, Didemnum molle, on the Great Barrier Reef. https://apps.aims.gov.au/metadata/view/4ddb7c3d-9190-4042-94ec-0c9025e5ed6e, 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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Photosynthesis and respiration of ascidian/algal symbiosis (Didemnum molle/Prochloron) was measured at 5 m over 24 h using an in situ respirometer at Heron Island. Several colonies were incubated within each of 3 chambers.Readings from a light sensor and oxygen probes were automatically logged and read to tape [no longer available] then averaged by computer. The rate of photosynthesis to respiration, and percent contribution of Prochloron to ascidian respiration (CPAR) was calculated. Due to cloud conditions at the time of incubations, irradience was also calculated as for idealised light conditions. Chlorophyll a content, wet and dry weights of colonies were calculated.Respiration rate was determined by Winkler titration using water samples taken from whole colonies of various sizes (g wet weight) incubated at Lizard Island (Great Barrier Reef) at 2m depth. Colonies were differentiated between white and brown.
To determine the energy contribution of Prochloron to Didemnum molle from photosynthesis and respiration rates.

Lineage

Maintenance and Update Frequency: notPlanned

Notes

Credit
Olson, Richard R (Randy), Dr (Principal Investigator)

Modified: 18 09 2026

This dataset is part of a larger collection

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text: westlimit=151.94667; southlimit=-23.47316; eastlimit=151.94667; northlimit=-23.47316

text: westlimit=145.46667; southlimit=-14.66667; eastlimit=145.46667; northlimit=-14.66667

Subjects

oceans |

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Other Information

In situ measurement of photosynthesis and respiration in the ascidian-Prochloron symbiosis Didemnum molle: Olson RR and Porter JW (1985) In situ measurement of photosynthesis and respiration in the ascidian-Prochloron symbiosis Didemnum molle. 5: 257-262. In: Proceedings of the 5th International Coral Reef Congress, Tahiti, 27 May-1 June 1985. Antenne Museum-Ephe.

local : articleId=8286

Identifiers

global : 4ddb7c3d-9190-4042-94ec-0c9025e5ed6e