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Macroalgal coverage from video surveys of long spined sea urchin (Centrostephanus rodgersii) barrens habitat, eastern Tasmania, Australia (2001-2002)

Latest version published by CSIRO Oceans and Atmosphere on Sep 10, 2019 CSIRO Oceans and Atmosphere

The macroalgal cover was recorded from video surveys of the spatial extent of C. rodgersii "barrens" on rocky reef habitats using a towed underwater video system. Sampling took place at 13 regions along the east coast of Tasmania, each comprising 3 subsites. Thus, at each site, ca. 6-7 km of inshore rocky reef was surveyed for barren habitat using this method, with the entire survey covering > 80 km of reef.

Substratum types were resolved as either "unclassified reef" if the substratum type was unclear (usually where macroalgal cover prevented a clear view of the substratum) or, where the substratum could be discerned, "flat rock" with little apparent relief, "boulder reef", "cobble", "gravel", "pebble", or "sand". Habitat types denoted either C. rodgersii barrens, or habitat dominated by particular canopy-forming species.

Absence records are recorded. Macroalagal cover per taxa is measured as percent cover in 3 categories of 'Dominant algal species, >80% of canopy','Common algal species, 40-80% of canopy' and 'Rare algal species, <40% of canopy' for each observation.

Metadata record is and data download was from the IMAS Data Portal on 2019-09-05 via

Data Records

The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 28,533 records. 2 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.

  • Event (core)
  • Occurrence 
  • ExtendedMeasurementOrFact 

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.


Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 28,533 records in English (4 MB) - Update frequency: unknown
Metadata as an EML file download in English (10 KB)
Metadata as an RTF file download in English (9 KB)


The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Attribution Constraints The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link). Usage Constraints The data described in this record are the intellectual property of the University of Tasmania through the School of Zoology and the Tasmanian Aquaculture and Fisheries Institute. By using this data you are accepting the license agreement and terms specified above. You accept all risks and responsibility for losses, damages, costs and other consequences resulting directly or indirectly from using this site and any information or material available from it.


Researchers should respect the following rights statement:

The publisher and rights holder of this work is CSIRO Oceans and Atmosphere. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License.

GBIF Registration

This resource has not been registered with GBIF


GOOS EOV: Macroalgal Canopy Cover and Composition; Samplingevent


Who created the resource:

Craig Johnson
Principal Investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) IMAS - Hobart, Private Bag 129 7001 Hobart Tasmania

Who can answer questions about the resource:

Craig Johnson
Principal Investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) IMAS - Hobart, Private Bag 129 7001 Hobart Tasmania

Who filled in the metadata:

Craig Johnson
Principal Investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) IMAS - Hobart, Private Bag 129 7001 Hobart Tasmania

Who else was associated with the resource:

Dave Watts
OBIS Australia Node Manager
CSIRO Oceans & Atmosphere PO Box 1538 7001 Hobart Tasmania AU +61 3 6232 5062

Geographic Coverage

East coast of Tasmania

Bounding Coordinates South West [-43.597, 146.918], North East [-40.914, 148.372]

Taxonomic Coverage


Genus  Caulerpa spp.,  Cystophora spp,  Perithalia spp.
Species  Carpoglossum confluens,  Durvillaea potatorum,  Ecklonia radiata,  Lessonia corrugata,  Macrocystis pyrifera,  Phyllospora comosa

Temporal Coverage

Start Date / End Date 2001-10-26 / 2002-08-17

Bibliographic Citations

  1. Johnson, C., Ling, S., Ross, J., Shepherd, S. and Miller, K., 2005. Establishment of the long-spined sea urchin (Centrostephanus rodgersii) in Tasmania: First assessment of potential threats to fisheries. FRDC Final Report, Project No. 2001/044. University of Tasmania, Tasmanian Aquaculture and Fisheries Institute, School of Zoology.

Additional Metadata

marine, harvested by iOBIS

Alternative Identifiers