Community Composition and Spatial Variation of Epifauna on the Horse Mussel Modiolus Reef (1999)

The purpose of this data capture was to examine spatial variation in epifaunal community composition in order to inform the development of a sensitive and cost-effective future monitoring strategy. Modiolus modiolus reef communities are comparatively rich in species and because they are also scarce in the UK it was considered important to monitor elements of community composition as an attribute that indicates the condition of these features. This dataset contains the results of in-situ sampling carried out by divers to try to determine the spatial variation in epifaunal community composition on the horse mussel reef off the coast of North Pen Llyn.

Identification

Identifier
NRW_DS111878
Alternative Title
  • Cyfansoddiad cymunedau ac amrywiaeth gofodol epiffawna ar riff marchfisglod Modiolus
  • 1999 CCW Modiolus monitoring trial survey off North Pen Llyn JNCCMNCR40000775
Metadata Language
English
Lineage

The following methodologies were used. Epifaunal recording replicate quadrat sampling position markers were deployed at stratified random positions along the axis of 7 reef 'crest' and 'trough' features. 6 rows were sampled by divers 'in-situ' and the 7th row was recorded using video. Divers were instructed to record as many species as possible on their recording slate and 'gridded' quadrats were used to assist in systematic counting or video recording. Each diver recorded the epifauna within a quadrat from as many rows (1-6) as possible in order to spread any errors associated with recording experience and inter-worker variability across rows.
Additional Information

This is the trial of methods that were later developed and superceeded by the use of video quadrats, see metadata entry Monitoring the health of the North Llyn Modiolus Reef (OLIB URI 110271
Dataset Reference Date (Publication)
2001-03-01
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Originator
  Countryside Council for Wales (CCW)
Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW
http://naturalresourceswales.gov.uk/splash?orig=/
 

Extent

Extent

Geographic Extent
Swansea Bay
Geographic Extent
Cardigan Bay
Geographic Extent
Tremadog Bay
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 

Vertical Extent

Medin Extent Keyword

benthic boundary layer
 
 

Distribution

Format Type and Description
  • Database ()

    Specification

    [A] Data is in Marine Recorder 1999 CCW Modiolus monitoring trial survey off North Pen Llyn JNCCMNCR40000775 [B] MNCR form are held in hardcopy format. [C] Report also in hard copy.

 

Quality

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

The following methodologies were used. Epifaunal recording replicate quadrat sampling position markers were deployed at stratified random positions along the axis of 7 reef 'crest' and 'trough' features. 6 rows were sampled by divers 'in-situ' and the 7th row was recorded using video. Divers were instructed to record as many species as possible on their recording slate and 'gridded' quadrats were used to assist in systematic counting or video recording. Each diver recorded the epifauna within a quadrat from as many rows (1-6) as possible in order to spread any errors associated with recording experience and inter-worker variability across rows.
 

Keywords

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
  • horse mussel
  • modiolus modiolus
  • reef
  • Pen Llyn a'r Sarnau SAC
  • epifauna
  • marine monitoring (see also marine surveys)
  • marine surveys (intertidal & subtidal surveys) (littoral survey) (sublittoral surveys) (bathymetric survey) (see also marine monitoring and MNCR)
  • monitoring (see specific types of monitoring eg. woodland monitoring)
Type
Theme

Citation

Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary
  • Habitat characterisation
Type
Theme

Citation

Date (Revision)
2021-01-06
Code
geonetwork.thesaurus.external.theme.rdf+xml
 

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

Content

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
 

Constraints

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 copyright of the owners. It is the recipient's responsibility to ensure the data is fit for the intended purpose.
 
 
 

Metadata

Metadata

File Identifier
4f4c4942-4343-5764-6473-313131383738 XML
Metadata Language
English
Parent Identifier
Natural Resources Wales (NRW) Marine Benthic Species and Habitat Collation Held in Marine Recorder

NRW_DS114501
Resource type
Dataset
Metadata Date
2024-05-31T09:39:10.606Z
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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