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2001 Strategic Environmental Assessment SEA2 Technical report - A review of pockmarks in the UK part of the North Sea, with particular respect to their biology

As part of the Department of Trade and Industry's (now Department of Energy and Climate Change) Strategic Environmental Assessment (SEA2), this report reviews pockmarks in the North Sea. Pockmarks frequently contain unusual densities of fish, typically large gadoids such as cod, torsk and ling. High densities of fish otoliths have been found in one North Sea pockmark. The existence of cemented sediment in the base of pockmarks can provide a refuge for fish and a hard substrate for colonisation by epifauna such as anthozoa. Deep active pockmarks, such as the three studied in block 15/25, are known to contain species dependent on high sulphide concentrations, originating from seepage or enhanced sedimentation. Some of these species are not found elsewhere in the open North Sea. The 20 m deep "Scanner" pockmark in block 15/25 is the only pockmark in the UK sector of the North Sea whose biology has been studied in detail. It is the only known habitat of the gutless nematode Astononema southwardorum.

Simple

Date (Publication)
2001-08-01
Identifier
British Geological Survey / BGS_SEA_17
Custodian
  British Geological Survey (BGS) - Paul Henni
Murchison House, West Mains Road , Edinburgh , EH9 3LA , UK
+44 (0)131 667 1000
Originator
  Department for Energy and Climate Change (DECC)
Admiralty Way , London , SW1A 2HD , UK
+44 0300 060 4000
+44 (0) 1823 284077
Maintenance and update frequency
notPlanned Not planned
Name
Documents
Keywords
  • NDGO0001
SeaDataNet Parameter Discovery Vocabulary
  • Fauna abundance per unit area of the bed
  • Fish taxonomy-related abundance per unit area of the bed
  • Habitat characterisation
  • Zoobenthos generic abundance
GEMET - INSPIRE themes, version 1.0
  • Geology
  • Habitats and biotopes
SeaVoX Vertical Co-ordinate Coverages
  • crust
  • sediment
Use limitation
The SEAs data were produced as part of the UK Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment programme; Crown Copyright, all rights reserved. The DECC SEA must be acknowledged in any maps or publications that make use of the data. All the data files are freely available to the public. The Strategic Environmental Assessment (SEA) data portal provides free access to available data and reports which have been produced through the SEA process. The site is run and managed by BGS on behalf of the Department of Energy and Climate Change (DECC). Many files can be downloaded directly from this website. Those that are too large to download can be ordered via the website for postal delivery from BGS. BGS (NERC) has been contracted by DECC to publish SEA datasets on its behalf. All intellectual property rights (including , without limitation, copyrights, database rights and all other rights which subsist or may at any time in the future subsist in the Dataset(s)) in the Dataset(s) ('Intellectual Property Rights') are owned by DECC (formerly the Department of Trade and Industry, and the Department for Business, Enterprise and Regulatory Reform). BGS has been authorised by DECC to use SEA datasets for all purposes but on a 'not-for-profit basis'. BGS has been authorised by DECC to pass on SEA datasets to third parties so that they can use them for all purposes but on a 'not-for-profit' basis.
Access constraints
intellectualPropertyRights Intellectual property rights
Distance
5  http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#m
Metadata language
EnglishEnglish
Topic category
  • Biota
  • Environment
  • Geoscientific information
  • Oceans
Date (Revision)
2006-01-01
Unique resource identifier
North Sea
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Begin date
2001-01-01
End date
2001-01-01
Supplemental Information
http://www.offshore-sea.org.uk/site/index.php
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326
Distribution format
OnLine resource
Strategic Environmental Assessment (SEA) data portal

The Strategic Environmental Assessment (SEA) data portal provides free access to available data and reports which have been produced through the UK Department of Energy and Climate Change SEA process. The site is run and managed by BGS on behalf of the Department of Energy and Climate Change (DECC). Many files can be downloaded directly from this website. Those that are too large to download can be ordered via the website for postal delivery from BGS.

Hierarchy level
dataset Dataset
Statement
This report was written by Professor Paul Dando (School of Ocean Sciences, University of Wales, Bangor) as part of the UK Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment programme. Various reports and data sources well used to compile the report.
File identifier
aba64100-c107-4de3-e044-0003ba6f30bd XML
Metadata language
EnglishEnglish
Hierarchy level
dataset Dataset
Date stamp
2011-08-30
Metadata standard name
MEDIN Discovery Metadata Standard
Metadata standard version
Version 2.3.5
Point of contact
  British Geological Survey (BGS) - Mary Mowat
+44 (0)131 667 1000
+44 (0)131 668 4140
 
 

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