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Visual evidence of reduced seafloor conditions and indications of a cold-seep ecosystem from the Hatton–Rockall basin (NE Atlantic)

Lookup NU author(s): Dr Alan Jamieson, Dr Thomas Linley



This is the authors' accepted manuscript of an article that has been published in its final definitive form by Cambridge University Press, 2019.

For re-use rights please refer to the publisher's terms and conditions.


Copyright © Marine Biological Association of the United Kingdom 2018 High definition video from a towed camera system was used to describe the deep-sea benthic habitats within an elongate depression located at the western margin of Rockall Bank in the Hatton–Rockall Basin. At depths greater than 1190 m, an extensive area (10 km long by 1.5 km wide) of what appeared to be reduced sediments, bacterial mats and flocculent matter indicated possible cold-seep habitat. Plumes of sediment-rich fluid were observed alongside raised elongate features that gave topographic relief to the otherwise flat seafloor. In the deepest section of the depression (1215 m) dense flocculent matter was observed suspended in the water column, in places obscuring the seabed. Away from the bacterial mats, the habitat changed rapidly to sediments dominated by tube-dwelling polychaete worms and then to deep-sea sedimentary habitats more typical for the water depth (sponges and burrowing megafauna in areas of gentle slopes, and coral gardens on steeper slopes).

Publication metadata

Author(s): Neat FC, Jamieson AJ, Stewart HA, Narayanaswamy BE, Collie N, Stewart M, Linley TD

Publication type: Article

Publication status: Published

Journal: Journal of the Marine Biological Association of the United Kingdom

Year: 2019

Volume: 99

Issue: 2

Pages: 271-277

Print publication date: 01/03/2019

Online publication date: 27/03/2018

Acceptance date: 02/02/2018

Date deposited: 15/06/2018

ISSN (print): 0025-3154

ISSN (electronic): 1469-7769

Publisher: Cambridge University Press


DOI: 10.1017/S0025315418000115


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