Rosebank & Lochnagar

Mission 1

Images | Videos

Location: Rosebank-Lochnagar, North East Atlantic, UK
Position: Faroe-Shetland Channel
Depth: 1100m
Water Temperature: No data
Dates: Pre-drilling visit 4 – 13 April 2007
Post-drilling visit 7 – 13 June 2007
Industry Partners  
Gas & Oil Company Chevron
ROV Operator: Subsea7
Rig operator: Transocean
SERPENT Representatives: Dr Andrew Gates
   

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Mission Plan

SERPENT carried out a mission in collaboration with Chevron UK to study the ecology of the deepwater Faroe-Shetland Channel; in particular the effects of drilling disturbance. The mission took place on the semi-submersible drilling rig Transocean Rather in two parts; one pre-drilling and one post-drilling visit.

The pre-drilling visit was used to observe the environment prior to disturbance and to set up some experiments on the seabed. The follow-up visit was used to repeat the pre-drilling surveys and to recover the experiments.

Sample collection

During the pre-drilling visit the Subsea 7 Centurion 05 HD work class ROV was used to collect video transects centred on the proposed location of the BOP prior to drilling disturbance. These were repeated during the post-drilling visit in order to assess the disturbance caused by the drilling operations.

A number of experiments were also deployed during the first visit and recovered in the second. These included a protocol new to SERPENT to collect deep water biofilms to study the micro-organisms that grow on surfaces in the deep sea and bioturbation experiments to monitor the reworking of the disturbed sediment by the organisms living in the mud on the seabed.

For best images, please visit the Rosebank Gallery
Visit the database archive for more detail.

Eco highlights

Rays images
Rays were the most common fish observed at Rosebank.

Sea spiders images
Nymponid pycnogonids (Sea spiders) were common at Rosebank. A number of different species were observed including the two above. The pycnogonid on the right is carrying juveniles.

Octopus images
Cephalopods: Two different species of octopus were present at Rosebank. Left: A benthic octopus resting on the seabed. Right: a pelagic cirrate octopus observed swimming during ROV transit.

Soft corals images
A number of different Alcyonaceans (soft corals) were present attached to rocks on the seabed.

Sponge images
Porifera (Sponges): There were a number of different sponge species observed during the SERPENT visit. The unidentified sponge on the left was commonly attached to larger rocks while the giant clubsponge (Chondrocladia gigantea) (right) was the only specimen of an uncommon species observed during the visit

For further information please contact:
Dr Andrew Gates or Dr Daniel Jones, SERPENT Project, National Oceanography Centre, Southampton, UK.

Rosebank & Lochnagar location map Dr Andrew Gates

About Andy
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T: +44 (0)2380 596363
E: arg3@noc.soton.ac.uk