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Variability and long-term change in the demography of the sponge Rhopaloeides odorabile, across the central Great Barrier Reef

Created 24/06/2017

Updated 09/10/2017

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Demographic surveys of the sponge, Rhopaloeides odorabile, were conducted across the continental shelf in the central Great Barrier Reef during January and February 2005 using SCUBA.

The inner-shelf reefs surveyed (within 20 km of the coastline) were fringing reefs at Curacoa Island, Pelorus Island and Dunk Island. The mid-shelf reefs chosen (between 40 and 60 km from the coastline) were Davies Reef, Kelso Reef and Small Kelso Reef. The outer-shelf reefs surveyed (beyond 60 km from the coastline) were Pith Reef, Dip Reef and Fork Reef.

Five replicate 25 m x10 m belt transects, randomly laid along the depth continuum, parallel to the reef slope, were placed at each of three sites, separated by 100 to 200m, on the exposed south-east face of each reef, at depths between 3 and 15 m. This habitat was chosen as Rhopaloeides odorabile prefers high energy environments.

For each Rhopaloeides odorabile specimen recorded on each transect, the greatest dimensions for length, width and height were measured to the nearest half centimetre, using a ruler, to allow calculation of volume measurements (estimated for an overall hemispherical, rectangular or, occasionally, a prism shape). Volume estimates also correlate well with actual biomass. Sponge individuals were grouped into four size classes: 4300 cm³ (very large). The depth of each sponge was also recorded.

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Title Variability and long-term change in the demography of the sponge Rhopaloeides odorabile, across the central Great Barrier Reef
Language English
Licence Other
Landing Page https://devweb.dga.links.com.au/data/dataset/8eb039a2-3a04-4207-a0f2-4b5dff4cc379
Contact Point
Australian Institute of Marine Science
adc@aims.gov.au
Geospatial Coverage {"type": "Point", "coordinates": [147.016667, -18.216667]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Variability and long-term change in the demography of the sponge Rhopaloeides odorabile, across the central Great Barrier Reef". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/variability-and-long-term-change-in-the-demography-of-the-sponge-rhopaloeides-odorabile-across-

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