IMAS Metadata Catalogue
Management options to minimise formation of urchin barrens: assessing dynamics of incipient urchin barrens patches in eastern Tasmania using timed swims
Timed GPS-tracked swims using SCUBA (45 and 30 minutes), were used to assess the changes in frequency and size of Centrostephanus rodgerii incipient barrens in eastern Tasmania. The number of C. rodgerii and Heliocidaris erythrogramma in each incipient barren were also assessed.
Simple
Identification info
- Date (Creation)
- 2011-09-16T15:58:00
Principal investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Johnson, Craig, Prof.
IMAS-Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
Collaborator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Ling, Scott, Dr (Research Associate)
IMAS-Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
researchAssistant
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Sanderson, Craig, Dr (Senior Technical Officer)
IMAS-Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
- Purpose
- Assessment of Management Options to Minimise Formation of 'Barrens' Habitat by the Long-Spined Sea Urchin (Centrostephanus rodgersii) in Tasmania
- Credit
- Juan Gabriel Dominguez Sarimento
- Credit
- Emma Flukes
- Credit
- Funding: FRDC project 2007/045
- Status
- Completed
Principal investigator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Johnson, Craig, Prof.
IMAS - Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
Collaborator
Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - Ling, Scott, Dr (Marine Experimental and Quantitative Ecologist)
IMAS - Sandy Bay
Private Bag 129
Hobart
TAS
7001
Australia
- Spatial representation type
- Text, table
- Temporal resolution
-
P1Y0M0DT0H0M0S
- Topic category
-
- Biota
Extent
N
S
E
W
))
Temporal extent
- Time period
- 2007-11-01T00:00:00 2011-02-28T00:00:00
Vertical element
- Minimum value
- 10
- Maximum value
- 15
- Identifier
- EPSG::5715
- Name
- MSL depth
- Maintenance and update frequency
- Not planned
Resource format
- Title
- Microsoft Excel (xlsx)
- Date
- Edition
- 2007
- Global Change Master Directory Earth Science Keywords v.5.3.8
-
- Oceans | Marine Biology | Marine Invertebrates
- Biosphere | Aquatic Habitat | Reef Habitat
- Oceans | Marine Biology | Marine Habitat
- Biosphere | Ecological Dynamics | Community Structure
- Keywords (Taxon)
-
- Centrostephanus rodgersii
- Heliocidaris erythrogramma
- Keywords (Theme)
-
- Urchin barren
- Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
- Keywords (Theme)
-
- Substratum type
- Number of incipient barren patches
- Incipient barren area
- Depth
- Number of C. rodgersii
- Number of H. erythrogramma
Resource constraints
- Classification
- Restricted
Resource constraints
- Use limitation
- The data described in this record are the intellectual property of University of Tasmania through the Institute for Marine and Antarctic Studies
Resource constraints
- Linkage
-
http://i.creativecommons.org/l/by-sa/2.5/au/88x31.png
License Graphic
- Title
- Creative Commons Attribution-Share Alike 2.5 Australia License
- Website
-
http://creativecommons.org/licenses/by-sa/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
- See point of contact for access to the data. Data will be available upon publication.
Associated resource
- Title
- FRDC project 2007/045
- Date (unknown)
- 2011-09-16T00:00:00
- Language
- English
- Character encoding
- UTF8
- Supplemental Information
- References: Final FRDC Report in draft format.
Content Information
- Content type
- Physical measurement
- Name
-
Substratum type
- Name
-
Number of incipient barren patches
- Name
-
Incipient barren area
- Name
- m2
- Name
-
Depth
- Name
- metres
- Name
-
Number of C. rodgersii
- Name
- Small (<70mm) or Large (>70mm)
- Name
-
Number of H. erythrogramma
Distribution Information
- Distribution format
-
-
Microsoft Excel (xlsx)
-
Microsoft Excel (xlsx)
Resource lineage
- Statement
- Two swims are used to assess each site. The diver had a foam float on the surface housing a GPS device (track log turned on, WGS84) to track the swim positions. The swim direction was parallel to the coastline (along shore) with the diver maintaining a steady depth between 10 and 15 metres. Swims were 30 minutes in duration for "Abalone Activity" sites and 45 minutes in duration for translocated lobster experiment sites, with the diver maintaining a constant speed during this time. Time at which barrens were observed were recorded by the diver in situ with positional estimates (lat, lon) obtained for the barrens by synchronising diver time (watch/ dive computer) with that of the GPS. For each incipient barren found, the diver recorded the approximately grazed area in square metres and the number of C. rodgerii and H. erythrogramma present in the barren. In the case that the barren was too large to be assessed instantaneously (i.e. ~more than 10m), the diver recorded the time upon entering the patch and the time when exiting the patch and an approximate width of the barren (this data was used in the lab to estimate the size of the barren from GPS coordinates), in this case the diver didn't count sea urchin individuals but approximated the overall number of C. rodgerii within the grazed area to the nearest 10, 50 or 100 urchins depending on the size of the patch/ population, i.e. if population was approximately 100 units to the nearest "10" individual urchins was used, if population 500 units of the nearest "50" was used, i.e. estimates were approximated to within the nearest 10% of overall population size.
- Hierarchy level
- Dataset
Resource lineage
- Statement
- GPS used datum WGS84.
- Hierarchy level
- Collection hardware
Metadata
- Metadata identifier
-
8720b9de-26b7-46c7-998b-77f169799a10
- Language
- English
- Character encoding
- UTF8
Principal investigator
Point of contact
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/8720b9de-26b7-46c7-998b-77f169799a10
Point of truth URL of this metadata record
- Date info (Creation)
- 2020-09-17T18:00:54
- Date info (Revision)
- 2020-09-17T18:00:54
Metadata standard
- Title
- ISO 19115-3:2018
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available