BGS Hosted Metadata
Organisms identified from OFOBS images from PS118 Profiles 6_9 (Weddell Sea) and 69 (Powell Basin), April - May 2019
This dataset contains the object ID, morphotaxonomic name, and approximate size (in mm) of over 70,000 organisms identified from select Ocean Floor Observation and Bathymetry System (OFOBS) images from the cruise PS118 to the Weddell Sea from April - May 2019. Images were collected for assessing epibenthic megafauna communities and establishing temporal baselines for future studies.
This work has been supported by Natural Environment Research Council (NERC) Independent Research Fellowship NE/S014756/1, awarded to EM. TK is funded by a Cambridge International and Newnham College Scholarship, administered by Cambridge Trust. RW and HG are funded by UK Research and Innovation (UKRI) Future Leaders Fellowship MR/ W01002X/1 "The past, present and future of unique cold-water benthic (seafloor) ecosystems in the Southern Ocean" awarded to RW. HG is also funded by BIOPOLE, funded by the NERC, under National Capability Science Multi-Centre award scheme (NC-SM2).
Simple
- Date (Creation)
- 2025-03-18
- Date (Revision)
- 2025-03-18
- Date (Publication)
- 2025-03-18
- Date (released)
- 2025-03-18
- Edition
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1.0
- Unique resource identifier
- https://doi.org/10.5285/7fb2f0c1-413c-4cd6-84ab-a504bf431290
- Codespace
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doi
- Unique resource identifier
- GB/NERC/BAS/PDC/02031
- Codespace
- Unique resource identifier
- NE/S014756/1
- Codespace
-
award
- Other citation details
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Please cite this item as: Khan, T.M., Griffiths, H.J., Whittle, R.J., Stephenson, N., Delahooke, K., Purser, A., Manica, A., & Mitchell, E.G. (2025). Organisms identified from OFOBS images from PS118 Profiles 6_9 (Weddell Sea) and 69 (Powell Basin), April - May 2019 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/7fb2f0c1-413c-4cd6-84ab-a504bf431290
- Credit
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No credit.
- Status
- Completed
- Point of contact
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Organisation name Individual name Electronic mail address Role University of Cambridge Khan, Tasnuva Ming Author British Antarctic Survey Khan, Tasnuva Ming Author British Antarctic Survey Griffiths, Huw J Author British Antarctic Survey Whittle, Rowan J Author University of Cambridge Stephenson, Nile Author Cambridge Museum of Zoology
Stephenson, Nile Author University of Cambridge Delahooke, Kate
Author Alfred Wegener Institute for Polar and Marine Research Purser, Autun Author University of Cambridge Manica, Andrea Author University of Cambridge Mitchell, Emily G Author NERC EDS UK Polar Data Centre Point of contact
- Maintenance and update frequency
- As needed
- Maintenance note
- Completed
- Theme
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OFOBS
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Photographic survey
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Powell Basin
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Weddell Sea
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annotations
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- Place
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Powell Basin Weddell Sea
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GEMET - INSPIRE themes, version 1.0
- Access constraints
- Other restrictions
- Other constraints
- no limitations to public access
- Access constraints
- Other restrictions
- Other constraints
- no limitations
- Use constraints
- License
- Other constraints
- Open Government Licence v3.0
- Use constraints
- Other restrictions
- Other constraints
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This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/
- Use constraints
- Other restrictions
- Other constraints
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This data is governed by the NERC data policy and supplied under Open Government Licence v.3
- Use constraints
- Other restrictions
- Other constraints
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None.
- Unique resource identifier
- url
- Codespace
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url
- Association Type
- dependency
- Unique resource identifier
- url
- Codespace
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url
- Association Type
- Cross reference
- Spatial representation type
- Text, table
- Language
- English
- Character set
- UTF8
- Topic category
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- Biota
- Oceans
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- Begin date
- 2019-03-06
- End date
- 2019-03-31
- Supplemental Information
-
It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.
- Title
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European Petroleum Survey Group (EPSG) Geodetic Parameter Registry
- Date (Publication)
- 2008-11-12
- Cited responsible party
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Organisation name Individual name Electronic mail address Role European Petroleum Survey Group
Publisher
- Unique resource identifier
- urn:ogc:def:crs:EPSG::3031
- Version
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6.18.3
Distributor
- Distributor contact
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Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Distributor
- Distributor format
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Name Version text/csv
- Units of distribution
-
bytes
- Transfer size
- 7864320
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--link
http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=7fb2f0c1-413c-4cd6-84ab-a504bf431290 Get Data
- Hierarchy level
- Dataset
- Statement
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Methodology:
OFOBS Data was collected on the AWI Polarstern cruise PS118 from April-May 2019 in order to assess epibenthic megafauna communities and establishing temporal baselines for comparison with future studies. OFOBS photos contain latitude, longitude, and the water depth at which the photo was taken. Each photograph had three laser dots placed in an equilateral triangle (50 cm sides) near the center of the photograph.
We annotated two profiles: Profile 69_1 (Powell Basin, approx. 2000 m water depth) and Profile_6_9 (Weddell Sea, approx. 420m water depth), as these two profiles provided the maximum variation in substrate and water depth for this cruise. Photo annotations were made on Inkscape. We scaled each photo using the laser dots and used a sample box of 1.5m x 1.5 m for annotations for the Powell Basin, and 2 m x 1.5 m for the Weddell Sea. We identified, at least to class, often to genus and species levels, every macrobenthic organism visible in the photographs. Bounding boxes were ellipses.
Images can be downloaded from PANGAEA.
Annotations are found in the two csv files: "OFOBS_annotations_Powell_Basin.csv", "OFOBS_annotations_Weddell_Sea.csv".
The headers in these files refer to:
Morphotaxa - the best possible ID name for the observed individual
Ids - an object ID assigned by Inkscape when annotating
rx - the length of the ellipse (mm)
ry - the width of the ellipse (mm)
Area - the area of the ellipse (mm2), calculated using (0.5rx)*(0.5ry)*pi
Image - the filename of the annotated image. These images can be downloaded from PANGAEA.
These annotations were then condensed into site-by-taxa matrices in R. These can be found in the two further CSV files: "Abundance_Powell_Basin.csv", "Abundance_Weddell_Sea.csv".
The headers in these files refer to:
Image - the filename of the image.
encrustor_percentage (%) - an estimate of area coverage of the substrate by organisms - they are likely hard parts that settle on/are attached to the seafloor - they may be disarticulated/broken portions of stylasterids, lace corals, cup corals, or urchin spines, i.e., impossible to ascertain provenance.
Other columns - morphotaxa observed.
Data collection:
Inkscape Version 1.1
R
Data quality:
Annotations are made to the lowest taxonomic level possible based on the resolution of the seabed photographs.
Metadata
- File identifier
- 7fb2f0c1-413c-4cd6-84ab-a504bf431290 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
-
dataset
- Date stamp
- 2025-03-18
- Metadata standard name
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ISO 19115 Geographic Information - Metadata
- Metadata standard version
-
ISO 19115:2003(E)
- Metadata author
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Organisation name Individual name Electronic mail address Role NERC EDS UK Polar Data Centre Point of contact
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