Abstract:
In-situ underwater images were gathered during the expedition JR17003a of RRS James Clark Ross to the eastern Antarctic Peninsula in March 2018.
The BAS' Shallow Underwater Camera System (SUCS) has been used to estimate faunal density, biomass and species abundance of the benthos and to provide an overview of the conditions of the underwater landscape.
Funding was provided by NERC urgency grant NE/R012296/1 'Benthic biodiversity under Antarctic ice-shelves - baseline assessment of the seabed exposed by the 2017 calving of the Larsen-C Ice Shelf'.
Keywords:
Antarctic, benthic biodiversity, faunal assemblage, habitat heterogeneity, vulnerable marine ecosystems
Linse, K., Grant, S., Whittle, R., Reid, W., McKenzie, M., Federwisch, L., Polfrey, S., & Apeland, B. (2020). Benthic seafloor images from Prince Gustav Channel and Duse Bay, Eastern Antarctic Peninsula, March 2018 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/48dcef16-6719-45e5-a335-3a97f099e451
| Use Constraints: | This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v.3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
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| Creation Date: | 2020-10-13 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Katrin Linse |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Susie Grant |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Dr Rowan Whittle |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Mr Scott Polfrey |
| Role(s) | Technical Contact |
| Organisation | British Antarctic Survey |
| Name | Ms Bjorg Apeland |
| Role(s) | Technical Contact |
| Organisation | British Antarctic Survey |
| Name | Dr William D K Reid |
| Role(s) | Investigator |
| Organisation | Newcastle University |
| Name | Ms Melanie McKenzie |
| Role(s) | Investigator |
| Organisation | Museums Victoria |
| Name | Ms Luisa Federwisch |
| Role(s) | Investigator |
| Organisation | Alfred Wegener Institute |
| Parent Dataset: | N/A |
| Reference: | Peter M. Almond, Katrin Linse, Simon Dreutter, Susie M. Grant, Huw J. Griffiths, Rowan J. Whittle, Melanie Mackenzie, William D.K. Reid. In-situ image analysis of habitat heterogeneity and benthic biodiversity in the Prince Gustav Channel, Eastern Antarctic Peninsula. Submitted Oct 2020 to Frontiers in Marine Science. | |
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| Quality: | Standard protocols for SUCS deployment and image capture were followed. Data entry of SUCS' image geolocation data was linked to vessel's USBL system. Data entry of image number was double checked by independent person. | |
| Lineage/Methodology: | The in-situ underwater still images and short videos were gathered with BAS' Shallow Underwater Camera System (SUCS) during the expedition JR17003a of RRS James Clark Ross to the eastern Antarctic Peninsula in March 2018. The SUCS for JR17003a comprised three units: 1. The UIC unit consisting of (i) the PC with monitor, (ii) the cable metering sheave indicator and (iii) the deck box. 2. The deck unit consisting of (i) the winch, (ii) UW-cable, (ii) the deck monitor and (iii) the metering sheave on the mid-ships gantry. 3. The UW-unit of the tripod consisting of (i) the UW-housing including the camera, booster and power distribution board, (ii) the UW-light, and (iii) the USBL. The SUCS includes 1000 m of fibre-optic cable, allowing operation to approximately 900m depth. The LabView interface together with the fibre-optic upgrade enables high- resolution photo stills (2448 x 2050) and video footage (720 x 480) to be taken simultaneously. The field of view when the SUCS is standing on the seafloor is covering 0.51 m2 of seafloor. The SUCS and Agassiz gears, when both deployed at the same site, increase the value of the data obtained. This is because specimens trawled in the latter and identified by detailed morphological inspection or using molecular methods improve the likelihood and confidence of correct identifications of individuals seen in the SUCS images. The SUCS was deployed at 12 stations (ranging in depth from 200 m to 800 m), according to weather and accessibility due to ice conditions. The SUCS was used extensively during the time when heavier gear could not be operated due to problems with the 30t winch, allowing coverage of a wider range of depth stations. On one occasion SUCS deployment was delayed because of very cold temperatures (-15°C) affecting the backlight of the winch monitor screen. This was resolved by re-routing the image output to an alternative monitor, and using a portable heater for subsequent deployments. Normal protocol involved three consecutive photo transects, the direction of which was determined by the bridge according to wind direction (to allow the ship to sit comfortably in dp), each 100 m apart, with each complete transect consisting of 10 photos, themselves each 10 m apart. Duplicates of each photo were taken with different light levels, to allow distinguishing of different features. At two locations the three transects were not fully completed because of icebergs in close vicinity to the ship or problems with gear. Additional photos were sometimes taken during the 10 m relocation if the camera showed a good view, however these photos will not be included in subsequent analysis. Short videos using the SUCS camera were taken at some transect points or during relocations. |
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| Temporal Coverage: | |
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| Start Date | 2018-03-02 |
| End Date | 2018-03-08 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -64.13298 |
| Northernmost | -63.68463 |
| Longitude | |
| Westernmost | -58.49838 |
| Easternmost | -56.57873 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | 168 m |
| Max Depth | 915 m |
| Location: | |
| Location | Antarctica |
| Detailed Location | Antarctic Peninsula, Duse Bay, Prince Gustav Channel, Anderson Island |
| Data Collection: | The Shallow Underwater Camera System with Labview SUCS software and Prosilica camera system developed by the British Antarctic Survey, http://vocab.nerc.ac.uk/collection/B76/current/B7600022/. High- resolution photo stills (2448 x 2050) covering 0.51 m2 of seafloor and video footage resolution (720 x 480). |
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| Data Storage: | Data comprises 15 cruise event folders of still image files and short videos in the .png and .avi format, respectively, and 1 csv file with contextual information for each event. |
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