Ground truthing towed video images from North Pen Llyn horse mussel (Modiolus modiolus) reef

The Pen Llyn a'r Sarnau Special Area of Conservation (SAC) was initially selected for two of the Annex II habitat types listed in the Habitats Directive - reefs and estuaries. Monitoring trials were developed in relation to these two features. During the late 1990's there was a dynamic period where the development of marine monitoring and surveillance under the Habitats and Species Directive was undertaken. The presence of the horse mussel Modiolus modiolus off the north Pen Llyn is thought to have been known since the early 19th Century. The extent of the biogenic reef feature was considered an important attribute to monitor as part of the Pen Llyn a'r Sarnau SAC. This dataset consists of digital footage of the horse mussel (Modiolus modiolus) reef collected in 1999. Data was collected to validate the results of an acoustic monitoring survey of the Modiolus modiolus reefs present within the SAC.

Identifier: NRW_DS87108

Alternative Title

Lluniau fideo agos o greigres Modiolus modiolus gogledd Pen Llyn

Metadata Language: English

Lineage: A ground truthed RoxAnn(TM) was used to confirm the presence of Modiolus modiolus reef features see on the side scan sonar images. In 2010 a subset of videos were re-analysed to provide further habitat and species detail.

Additional Information: See section 3.3.1 Sanderson, WG. Bennell, J. Rees, EIS, Holt, RHF. 2001. Extent of north Pen Llyn Modiolus modiolus reef - the potential use of acoustic methods. within CCW Marine Monitoring Report No. 1.

Dataset Reference Date (Publication): 2001-03-31

Temporal Extent

Begin date: 1999-07-28

End date: 1999-07-29

Topic category

Oceans

Owner

Natural Resources Wales (NRW)

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

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

Originator

University of Wales, Bangor. School of Ocean Sciences

Bangor, Gwynedd, LL57 2DG

http://www.bangor.ac.uk

Extent

Geographic Extent: Wales (WLS)

Vertical Extent

Medin Extent Keyword: benthic boundary layer

Vertical Extent

Minimum value (metres): 0

Maximum value (metres): 50

Vertical CRS

Format Type and Description

Movie Movie ()

Specification

Video clips : 4 DVD's in .VOB format

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: A ground truthed RoxAnn(TM) was used to confirm the presence of Modiolus modiolus reef features see on the side scan sonar images. In 2010 a subset of videos were re-analysed to provide further habitat and species detail.

Keywords

GEMET - INSPIRE themes, version 1.0

Type: Theme

Citation

Date (Publication): 2008-06-01

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

Keywords

NRW Thesaurus

marine research
marine environment (marine habitats) (seas) (oceans) (maritime environment)
benthic marine communities

Type: Theme

Citation

Date (Publication): 2023-12-31

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

Keywords

SeaDataNet Parameter Discovery Vocabulary

Shellfish abundance and biomass in water bodies

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 programme of surveillance and monitoring for judging the condition of the features of Pen Llyn a'r Sarnau cSAC : 1. Progress to March 2001

NRW Related Title: The establishment of a programme of surveillance and monitoring for judging the condition of the features of Pen Llyn a'r Sarnau cSAC : 1. Progress to March 2001

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 on this data. NRW may release, publish or disseminate it freely.

Use Constraints

Use constraints type: Other restrictions

Other constraints: © CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.

Metadata

File Identifier: 4f4c4942-4343-5764-6473-3837313038 XML

Metadata Language: English

Resource type: Dataset

Metadata Date: 2024-05-31T09:14:19.517Z

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

Access the portal

Full access to the portal and metadata.

Ground truthing towed video images from North Pen Llyn horse mussel (Modiolus modiolus) reef

Identification

Temporal Extent

Extent

Extent

Vertical 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