Sublittoral Monitoring Trials of North Pen Llyn 1998
Treialon monitro isarforol o ogledd Pen Llŷn 1998

  • English
  • wel
  • All

The data was captured in order to assess the suitability of the biotope classification monitoring method trialled. A measure biotope richness as an attribute of north Pen Llyn reefs, was measured over three surveys transects between July and August 1998. Surveyors were experienced in Phase 2 survey methodology and each record was carefully re-examined by an experienced operator to ensure that data were comparable to those assigned to biotopes in the national classification, therefore were correctly assigned.

Identification

Dynodydd
Identifier
NRW_DS111142
Teitl Amgen
Alternative Title
  • 1998 CCW Llyn Peninsula sublittoral monitoring trials (JNCCMNCR40000772)
Laith Metadata
Metadata Language
English
Lineage

Fixed line transects were used in the following ways. A shot line was deployed from which divers reeled-out a 50 m tape from a pole. The pole was designed to measure a fixed transect width and in combination with the fixed 50 m travelled, limit the area surveyed. It was decided that the direction of deployments for the diver based transects would be random and that species and abundances were to be recorded in-situ using standard protocol. Divers were instructed to record the most conspicuous and characterising features of the biotope as opposed to recording all macroscopic organisms. Three broad trial zones were identified and in each zone between 20 and 30 random sampling points were generated using a random number generating program. There is a high confidence in this dataset. Surveyors were experienced in Phase 2 survey methodology and each record was carefully re-examined by an experienced operator to ensure that data were comparable to those assigned to biotopes in the national classification, therefore were correctly assigned. This trial was a precursor to the Across Wales Diving Monitoring Project (see metadata entry 109743).
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2001-04-30

Temporal Extent

Begin date
1998-07-31
End date
1998-08-07
 
Categori pwnc
Topic category
  • Biota
    Biota
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  CCW Marine Monitoring Team -
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword

benthic boundary layer

Maint Fertigol
Vertical Extent

Gwerth lleiaf
Minimum value (metres)
0
Gwerth uchaf
Maximum value (metres)
-45
System Gyfeirio Cydlynu Fertigol
Vertical CRS
 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Database ( Marine Recorder Online - Version 2.09.02 )

    Specification

    Marine Recorder

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
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

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

Fixed line transects were used in the following ways. A shot line was deployed from which divers reeled-out a 50 m tape from a pole. The pole was designed to measure a fixed transect width and in combination with the fixed 50 m travelled, limit the area surveyed. It was decided that the direction of deployments for the diver based transects would be random and that species and abundances were to be recorded in-situ using standard protocol. Divers were instructed to record the most conspicuous and characterising features of the biotope as opposed to recording all macroscopic organisms. Three broad trial zones were identified and in each zone between 20 and 30 random sampling points were generated using a random number generating program. There is a high confidence in this dataset. Surveyors were experienced in Phase 2 survey methodology and each record was carefully re-examined by an experienced operator to ensure that data were comparable to those assigned to biotopes in the national classification, therefore were correctly assigned. This trial was a precursor to the Across Wales Diving Monitoring Project (see metadata entry 109743).
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • Pen Llyn a'r Sarnau SAC
  • biogenic reef
  • Marine Recorder
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2026-10-19
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-19
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
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
 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
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

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
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 copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313131313432 XML
Laith Metadata
Metadata Language
English
Parent Identifier
Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder

NRW_DS114501
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-10-26T11:04:07.162Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
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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