4713f93c-d458-4c28-9b03-17f2c750cb2a urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-06-23T09:12:06 creation ISO 19115 2016 Halimeda growth on the Great Barrier Reef 4713f93c-d458-4c28-9b03-17f2c750cb2a Growth of the two most common Halimeda species (H. copiosa and H. opuntia) was studied at 4 sites on Davies Reef over 6 tagging periods between February 1981 and February 1982. Comparative data was collected from Myrmidon Reef for one tagging period (November 1981 to January 1982).A total of 1685 branch tips were tagged over the period of a year during visits to the reef at approximately 2-month intervals. New growth was recorded by detailed drawings mid-way and at the end of the period. If growth was too complex to record in the field, those samples were collected and taken back to the laboratory; new batches were tagged as replacements. The laboratory samples were photocopied, dried and weighed, and the total surface area measured with a Licor LI-3000 area meter.Variables recorded were: days, number of samples, time of year (Feb/Mar, Apr/May, Jun/Aug, Aug/Oct, Oct/Dec, Dec/Feb). Halimeda community habitat variables were: hole, bommie, leeward slope, windward slope.Rates were calculated for number of new segments per day. Rates of production were calculated in two ways based on (1) the number of branch tips per unit biomass and the rate of new segment production; and (2) the rate of loss of tagged branches in conjunction with rates of new segment production. Rates of contribution of Halimeda debris to sediment composition were also calculated. To quantify the growth of Halimeda on the central Great Barrier Reef. Supplements a study of Halimeda on reefs (of which Davies is one) across the Great Barrier Reef, see separate metadata record. {"type": "Polygon", "coordinates": [[[147.37, -18.84], [147.66, -18.84], [147.66, -18.25], [147.37, -18.25], [147.37, -18.84]]]} 147.37 147.66 -18.84 -18.25 Growth of Halimeda in reefal and inter-reefal environments: Drew EA and Abel KM (1983) Growth of Halimeda in reefal and inter-reefal environments. pp. 299-304. In: Baker JT, Carter RM, Sammarco PW and Stark KP (eds) Proceedings: Inaugural Great Barrier Reef Conference, Townsville Aug 28 - Sept 2, 1983. James Cook University Press. documentDigital Growth of Halimeda in reefal and inter-reefal environments: Drew EA and Abel KM (1983) Growth of Halimeda in reefal and inter-reefal environments. pp. 299-304. In: Baker JT, Carter RM, Sammarco PW and Stark KP (eds) Proceedings: Inaugural Great Barrier Reef Conference, Townsville Aug 28 - Sept 2, 1983. James Cook University Press. Halimeda biomass, growth rates and sediment generation on reefs in the Central Great Barrier Reef province: Drew EA (1983) Halimeda biomass, growth rates and sediment generation on reefs in the Central Great Barrier Reef province. Coral Reefs 2: 101-110. documentDigital Halimeda biomass, growth rates and sediment generation on reefs in the Central Great Barrier Reef province: Drew EA (1983) Halimeda biomass, growth rates and sediment generation on reefs in the Central Great Barrier Reef province. Coral Reefs 2: 101-110. AIMS Web Site documentDigital audio/basic AIMS Web Site documentDigital audio/basic AIMS Web Site documentDigital audio/basic AIMS Web Site documentDigital audio/basic Unnamed resource documentDigital License Graphic PNG Unnamed resource documentDigital HTML