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.

Dynodydd: NRW_DS87108

Teitl Amgen

Lluniau fideo agos o greigres Modiolus modiolus gogledd Pen Llyn

Laith Metadata: English

Datganiad: 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.

Gwybodaeth ychwanegol: 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.

Dyddiad cyfeirnod y set ddata (Cyhoeddiad): 2001-03-31

Ystod amser

Dyddiad cychwyn: 1999-07-28

Dyddiad gorffen: 1999-07-29

Categori pwnc

Oceans

Perchennog

Natural Resources Wales (NRW)

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

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

Cychwynnwr

University of Wales, Bangor. School of Ocean Sciences

Bangor, Gwynedd, LL57 2DG

http://www.bangor.ac.uk

Rhychwant

Hyd: Wales (WLS)

Map representing the geographic extent of the dataset

Maint Fertigol

Maint allweddair MEDIN: benthic boundary layer

Maint Fertigol

Gwerth lleiaf: 0

Gwerth uchaf: 50

System Gyfeirio Cydlynu Fertigol

Fformat - Math a Disgrifiad

Movie Movie ()

Math

Video clips : 4 DVD's in .VOB format

Ansawdd Data

Cwmpas Ansawdd: Dataset

Cydymffurfiad: 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
Eglurhad
Gradd: false

Datganiad: 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.

Allweddair

GEMET - INSPIRE themes, version 1.0

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2008-06-01

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

Allweddair

NRW Thesaurus

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

Math: Theme

Dyfyniad

Dyddiad (Cyhoeddiad): 2023-12-31

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

Allweddair

SeaDataNet Parameter Discovery Vocabulary

Shellfish abundance and biomass in water bodies

Math: Theme

Dyfyniad

Dyddiad (Adolygu): 2021-01-06

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

Cod: British National Grid (EPSG::27700)

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

Teitlau cysylltiedig CNC: 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

Teitlau cysylltiedig CNC: 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

Cyfyngiadau

Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus

Math o Gyfyngiad: Other restrictions

Cyfarwyddeb Cyfyngiadau Mynediad

Cyfyngiadau: no limitations

Testun cyfyngiadau mynediad

Cyfyngiadau eraill: There are no access restrictions on this data. NRW may release, publish or disseminate it freely.

Defnyddiwch gyfyngiadau

Cyfyngiadau Defnyddio: Other restrictions

Cyfyngiadau eraill: © 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

Dynodydd Ffeil: 4f4c4942-4343-5764-6473-3837313038 XML

Laith Metadata: English

Math o adnodd: Dataset

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

Enw Safonol Metadata: NRW

Fersiwn Metadata: 1.0

Pwynt Cyswllt

Natural Resources Wales (NRW)

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

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

Corff Cyhoeddi

Mynediad i'r Porth

Mynediad llawn i'r porth a'r metadata.

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

Dull adnabod

Ystod amser

Rhychwant

Rhychwant

Maint Fertigol

Maint Fertigol

Dosbarthiad

Ansawdd

Ansawdd Data

Allweddeiriau

Allweddair

Dyfyniad

Allweddair

Dyfyniad

Allweddair

Dyfyniad

System Cyfeirio Gofodol

Cynnwys

Gwybodaeth Cynnwys

Proffil CNC

Elfennau CNC

Cyfyngiadau

Cyfyngiadau

Cyfyngiadau ar Fynediad a Defnydd Cyhoeddus

Cyfarwyddeb Cyfyngiadau Mynediad

Testun cyfyngiadau mynediad

Defnyddiwch gyfyngiadau

Metadata

Metadata

Corff Cyhoeddi