Surveys of sea urchins (Centrostephanus rodgersii and Heliocidaris erythrogramma) and associated barrens habitat, Kent Group, Tasmania 1974, 1981

Quantitative surveys were undertaken at five sites in the Kent Group, north eastern Tasmania (Murray Pass, Winter Cove, Little Squally Cove,and southern end of Erith Island) by divers using underwater visual census methods to survey the reef habitat. Additional spot dive surveys were undertaken at northern side of East Cove, Garden Cove, Winter Cove, Squally Cove (Deal Island), northern and southern sides of West Cove (Erith Island) and north east and north west coasts of Dover Island.


Divers recorded numbers of sea urchins (Centrostephanus rodgersii and Heliocidaris erythrogramma), as well as extent of urchin barrens, size of algal patches, and measured boundaries of macroalgal patches of Macrocystis angustifolia, Phyllospora comosa and Ecklonia radiata-fucoid communities. Spot dives detailed additional qualitative observations of C. rodgersii.

Simple

Identification info

Date (Creation)
2008-04-28T10:00:00

Principal investigator

School of Zoology, University of Tasmania (UTAS) - Shepherd, Scoresby, Dr
Purpose
To determine the distribution of the long spined sea urchin (Centrostephanus rodgersii) and the purple urchin (Heliocidaris erythrogramma) and associated barrens habitat in the Kent Group, north eastern Tasmania.
Status
Completed

Principal investigator

South Australian Research and Development Institute (SARDI) - Shepherd, Scoresby, Dr
SARDI Aquatic Sciences
2 Hamra Avenue
West Beach
SA
5024
Australia

Point of contact

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Johnson, Craig, Prof.
IMAS - Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
ORCID ID >

Topic category
  • Biota

Extent

N
S
E
W


Temporal extent

Time period
1974-01-01T00:00:00 1983-01-12T00:00:00

Vertical element

Minimum value
5
Maximum value
50
Identifier
EPSG::5715
Name
MSL depth
Maintenance and update frequency
Not planned

Resource format

Title
Microsoft Excel (xls)
Date
Edition
2003
Global Change Master Directory Earth Science Keywords v.5.3.8
  • Oceans | Marine Biology | Marine Invertebrates
  • Biosphere | Aquatic Habitat | Reef Habitat
  • Biosphere | Vegetation | Algae
CAAB - Codes for Australian Aquatic Biota v2.
  • 25 211001
  • Centrostephanus rodgersii
  • 25 247001
  • Heliocidaris erythrogramma
  • 54 079001
  • Macrocystis angustifolia
  • 54 102001
  • Phyllospora comosa
  • 54 080001
  • Ecklonia radiata
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Keywords (Theme)
  • Urchin density
  • Extent of sea urchin barren
  • Size of algal patches within barrens
  • Boundaries of macroalgal patches

Resource constraints

Classification
Unclassified

Resource constraints

Use limitation
The data described in this record are the intellectual property of S. Shepherd

Resource constraints

Linkage
http://i.creativecommons.org/l/by/2.5/au/88x31.png

License Graphic

Title
Creative Commons Attribution 2.5 Australia License


>

Website
http://creativecommons.org/licenses/by/2.5/au/

License Text

Other 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).
Other constraints
Please contact C. Johnson for access to the data

Associated resource

Title
Surveys of the long spined sea urchin Centrostephanus rodgersii
Date (Creation)
2011-08-31T00:00:00
Language
English
Character encoding
UTF8
Supplemental Information
Reference: 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.

Content Information

Content type
Physical measurement
Name
Urchin density

Name
Extent of sea urchin barren

Name
Size of algal patches within barrens

Name
Boundaries of macroalgal patches

Distribution Information

Distribution format
  • Microsoft Excel (xls)

Distributor

Point of contact

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Johnson, Craig, Prof.
ORCID ID >

Resource lineage

Statement
Echinoid counts were undertaken at East Cove in May 1974 and March 1981 using dive survey methods. The diver swam along 3 straight-line transects perpendicular to the shore and along curved transects parallel to the shore at fixed depths of 5, 10 and 15 m. On perpendicular transects, the diver swam down the slope to the seaward edge of the reef and returned to shore along a parallel line (at 5m distance from outward line). The fixed depth transects were ca. 350 m long. On each transect swim, the number of sea urchins (C. rodgersii and H. erythrogramma) were recorded within 1 m of the line for each 2 minute interval of swimming time. Divers recorded extent of urchin barrens, size of algal patches (within barrens), and boundaries of macroalgal patches of M. angustifolia, P. comosa and E. radiata - fucoid communities were measured. Data from timed swims were converted to density estimates using the calibration of swimming speed applied in abalone studies (Johnson et al., 2005, Shepherd, 1985). Data were recorded on a map and contours constructed from this. Maps were digitised and mean densities calculated (by integration with contour bands). Additional spot dives where qualitative observations on C. rodgersii were made were conducted in the Kent Group (1974: Deal Island, sites, Erith Island - 1 site; 1981: Deal Island - 4 sites, Erith Island - 2 sites, and Dover Island - 2 sites). For these, divers recorded C. rodgersii along straight-line transects perpendicular to the shore from ca. 2 m to the sand-edge of the reef. Barrens type (Type I, under and overstorey both removed; and Type II, understorey removed, but overstorey of E. radiata/ other large fucoids largely intact).
Hierarchy level
Dataset

Metadata

Metadata identifier
8a7983d0-14d2-11dd-bdaa-00188b4c0af8

Language
English
Character encoding
UTF8

Point of contact

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - IMAS Data Manager

Type of resource

Resource scope
Dataset
Metadata linkage
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/8a7983d0-14d2-11dd-bdaa-00188b4c0af8

Point of truth URL of this metadata record

Date info (Creation)
2021-03-30T21:54:54
Date info (Revision)
2021-03-30T21:54:54

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


Keywords

Boundaries of macroalgal patches Extent of sea urchin barren Size of algal patches within barrens Urchin density
Global Change Master Directory Earth Science Keywords v.5.3.8
Biosphere | Aquatic Habitat | Reef Habitat Biosphere | Vegetation | Algae Oceans | Marine Biology | Marine Invertebrates

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