Management options to minimise formation of urchin barrens: kelp lines - assessment of changes in kelp growth at the kelp-barren interface

Linear video transects (40m total length; 20m into barrens and 20m into kelp from original fixed marker on the benthos) were used to assess changes in kelp growth in several points along the kelp - urchin barren interface in north-east Tasmania (St. Helens Island, Sloop Rock and Elephant Rock research areas). The video transects were deployed in the same position, and assessed at different points of time. The video was analysed in the laboratory to assess percentage of kelp and barren cover, as well as the kind of substratum, kelp species identifiable and number of sea urchins (Centrostephanus rodgerii and Heliocidaris erythrogramma) and other benthic organisms when present (rock lobster and abalone).

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
ORCID ID >

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
ORCID ID >

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
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
ORCID ID >

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
ORCID ID >

Spatial representation type
Text, table
Temporal resolution
P0Y6M0DT0H0M0S
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
5
Maximum value
20
Identifier
EPSG::5715
Name
MSL depth
Maintenance and update frequency
Not planned

Resource format

Title
Windows Movie Maker
Date
Edition
2.1

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
  • Biosphere | Vegetation | Macroalgae
Keywords (Taxon)
  • Centrostephanus rodgersii
  • Jasus edwardsii
  • Haliotis rubra
  • Ecklonia radiata
  • Phyllospora comosa
  • Macrocystis pyrifera
  • Heliocidaris erythrogramma
Keywords (Theme)
  • Urchin barren
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Keywords (Theme)
  • Substratum type
  • Urchin barren coverage
  • Kelp coverage
  • Urchin abundance
  • Rock lobster abundance
  • Abalone abundance

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
Urchin barren coverage

Name
percentage
Name
Kelp coverage

Name
percentage
Name
Urchin abundance

Name
Number per m2
Name
Rock lobster abundance

Name
Number per m2
Name
Abalone abundance

Name
Number per m2

Distribution Information

Distribution format
  • Windows Movie Maker

  • Microsoft Excel (xlsx)

Resource lineage

Statement
Fixed position video transects (40m long) were deployed perpendicular to the Kelp-Barren interface (in most cases this would be perpendicular to the coast line). The transect was deployed 20 metres into the barren zone, always following the same bearing on the diver's compass. After the transect has been video recorded, the process was repeated 20 metres into the Kelp zone. The video was recorded along the transect line maintaining a constant speed (3 m/s) and a constant distance between the lens and the substrate. Photos derived from the videos were analysed using ImageJ software. The position of the kelp-barrens interface was also determined from still images derived from the video footage to determine any positional shifts in this interface relative to the orginal fixed marker(s). Photos across the entire transect (into barrens and into the kelp bed) were analysed (per m2) to assess the percentage cover of Barren and Kelp, with the percentage adjusted to the nearest multiple of 25 (25%, 50%, 75% or 100%). In addition the number of C. rodgersii (H. erythrogramma, Rock lobsters and abalone were counted, if they were visible) were counted.
Hierarchy level
Dataset

Resource lineage

Statement
GPS used datum WGS84. The video transects were recorded using a SONY Handycam, model DCRTRV900E or a NIKON D300S Digital Camera.
Hierarchy level
Collection hardware

Metadata

Metadata identifier
205ba802-5277-4724-951a-338d40e575f4

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/205ba802-5277-4724-951a-338d40e575f4

Point of truth URL of this metadata record

Date info (Creation)
2020-09-17T17:57:07
Date info (Revision)
2020-09-17T17:57:07

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


Keywords

Abalone abundance Kelp coverage Rock lobster abundance Substratum type Urchin abundance Urchin barren Urchin barren coverage
Global Change Master Directory Earth Science Keywords v.5.3.8
Biosphere | Aquatic Habitat | Reef Habitat Biosphere | Ecological Dynamics | Community Structure Biosphere | Vegetation | Macroalgae Oceans | Marine Biology | Marine Habitat Oceans | Marine Biology | Marine Invertebrates

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Associated resources

Not available