Establishment of a Permanent Monitoring Site at Mid Channel Rocks, Milford Haven

Data from a study undertaken to establish a permanent monitoring site on Mid Channel Rocks, Milford Haven. The work was commissioned following the grounding of the Sea Empress oil tanker on the Mid Channel Rocks, Milford Haven on February 15th 1996. On the four days following the grounding, the tanker remained in the immediate vicinity of these rocks, grounding and floating free several times. An estimated 70,000 tonnes of oil were spilled within one nautical mile of the Mid-Channel Rocks. A considerable volume of dispersant was applied from the air in the nearby area. This is expected to have led to significantly elevated hydrocarbon levels in the water column, possibly including the more toxic oil fractions where fresh oil was dispersed. The objectives of this project were to establish a permanent sublittoral monitoring site at a rock substrate location close to the source of the spilled oil and which was amongst the most likely to have been subjected to elevated water column hydrocarbon load and to undertake a baseline survey to document epibenthic rock community and species composition, diversity, richness and condition. Data was captured in order to establish a permanent sublittoral monitoring site at a rock substrate location close to the source of the spilled oil and to undertake a baseline survey to document epibenthic rock community and species composition, diversity, richness and condition.

Identifier: NRW_DS110209

Alternative Title

Sefydlu Safle Monitro Parhaol yn y Mid Channel Rocks, Aberdaugleddau

Metadata Language: English

Lineage: Divers using standard SCUBA apparatus carried out the survey work. Procedures were carried out under HSE DOW 1981 regulations and JNCC diving rules (Holt, 1993). Once the study sites were marked out, a variety of data collecting exercises were carried out: Community descriptions were obtained from defined areas using Marine Nature Conservation Review (MNCR) techniques. Particular rock faces were chosen which were typical of the main habitat / community types and careful studies were undertaken to list all conspicuous species present and note abundances. Counts of species in quadrats and also suction samples were undertaken at both the Lower Infralittoral and Circalittoral Study Sites. This project followed immediately on from one which surveyed selected locations along the South Pembrokeshire coast from Milford Haven to Caldey. Mid Channel Rocks was one of the sites surveyed and the work was carried out with the present monitoring study in mind. The only data associated with this project is held within the report.

Dataset Reference Date (Publication): 1998-06-30

Temporal Extent

Begin date: 1997-07-17

End date: 1997-07-28

Topic category

Environment
Biota

Owner

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Originator

MarineSeen

Estuary Cottage, Bentlass, Hundleton, Pembrokeshire, SA71 5RN, Wales

http://www.marineseen.com/

Originator

Subsea Survey

13-14 Merlins Cross, Lower Lamphey Road, Pembroke, Pembrokeshire, SA71 4AG

<!__ Nowebsite __!>

Extent

Geographic Extent: Wales (WLS)

Vertical Extent

Medin Extent Keyword: benthic boundary layer

Format Type and Description

Documents Documents ()

Specification

Report (MS Word and PDF-format) Postscript (MS Word)

Data quality

Quality Scope: Dataset

Conformity: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation
Degree: false

Lineage: Divers using standard SCUBA apparatus carried out the survey work. Procedures were carried out under HSE DOW 1981 regulations and JNCC diving rules (Holt, 1993). Once the study sites were marked out, a variety of data collecting exercises were carried out: Community descriptions were obtained from defined areas using Marine Nature Conservation Review (MNCR) techniques. Particular rock faces were chosen which were typical of the main habitat / community types and careful studies were undertaken to list all conspicuous species present and note abundances. Counts of species in quadrats and also suction samples were undertaken at both the Lower Infralittoral and Circalittoral Study Sites. This project followed immediately on from one which surveyed selected locations along the South Pembrokeshire coast from Milford Haven to Caldey. Mid Channel Rocks was one of the sites surveyed and the work was carried out with the present monitoring study in mind. The only data associated with this project is held within the report.

Keywords

GEMET - INSPIRE themes, version 1.0

Species distribution

Type: Theme

Citation

Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus

Milford Haven
Sea Empress
oil
oil tankers
dispersant
oil dispersants
hydrocarbon analysis
hydrocarbons
marine biology (subtidal biology) (littoral biology) (sublittoral biology)(intertidal biology)(see also seashore)
marine surveys (intertidal & subtidal surveys) (littoral survey) (sublittoral surveys) (bathymetric survey) (see also marine monitoring and MNCR)
rock communities
baseline survey
marine and freshwater inventory
permanent monitoring site
Mid Channel Rocks
toxic oil fractions
sublittoral monitoring site
water column hydrocarbon load
epibenthic rock community
diversity
richness
condition

Type: Theme

Citation

Date (Publication): 2023-12-31

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary

Pollution events
Zoobenthos generic abundance
Zoobenthos taxonomy-related counts

Type: Theme

Citation

Date (Revision): 2021-01-06

Code: geonetwork.thesaurus.external.theme.rdf+xml

Code: British National Grid (EPSG::27700)

Content Information

NRW Profile

Custom Elements

NRW Related Title: The establishment of a permanent monitoring site at Mid Channel Rocks, Milford Haven

Constraints

Limitations on Public Access and Use

Restriction type: Other restrictions

Access Constraints Directive

Limitations: no limitations

Access Constraints Text

Other constraints: There are no access restrictions to this data. NRW may release, publish or disseminate it freely.

Use Constraints

Use constraints type: Other restrictions

Other constraints: © CNC/NRW There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source.

Metadata

File Identifier: 4f4c4942-4343-5764-6473-313130323039 XML

Metadata Language: English

Resource type: Dataset

Metadata Date: 2024-05-31T09:38:35.489Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Publishing Body

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Full access to the portal and metadata.

Establishment of a Permanent Monitoring Site at Mid Channel Rocks, Milford Haven

Identification

Temporal Extent

Extent

Extent

Vertical Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body