Intertidal Monitoring of Muddy gravels (LMX.Psyllid) in Menai Strait and Conwy Bay Special Area of Conservation (SAC) 2004

Muddy gravels consist of shores of mixed sediments ranging from muds with gravel and sand components to mixed sediments with pebbles, gravels, sands and mud in even proportions. Mixed sediments which are predominantly muddy tend to support infauna similar to mud and sandy mud shores. Although sheltered muddy gravel habitats occur principally in estuaries, rias and sea lochs in areas protected from wave action and strong tidal streams, the environmental conditions of the Menai Strait are unusual, in that the water is relatively turbid and although the area is largely sheltered from wave action it experiences extremely strong tidal currents, reaching up to 8 knots in places during spring tides. The muddy gravel LMX.Psyllid biotope has been mapped along the west side of the Menai Straits, with the mixed sediment shores between Beaumaris and Lleiniog being highly productive, rich in animal and plant species. The muddy gravel LMX.Psyllid contains an unusually high number of syllid polychaetes and form a nationally important biotope, uncommon within the UK. The aim of this data capture was to identify the boundary of muddy gravel and muddy gravel with canopy of tideswept Fucus serratus. - To determine what exactly constitutes the boundary of muddy gravel - To measure the extent of the muddy gravel biotope - To determine a physical damage index for muddy gravels - To take samples at old and recently impacted areas of muddy gravel. - To characterise the infaunal community and identify the degree and type of change using previous data.

Identifier: NRW_DS101896

Alternative Title

2004 CCW / IECS Menai Strait and Conwy Bay SAC muddy gravel (LMX) epibiota monitoring MRCCW30200000007
2004 CCW / IECS Menai Strait and Conwy Bay SAC muddy gravel (LMX) core sampling MRCCW30200000009
Monitro rhynglanwol graean lleidiog (LMX.Psyllid) yn ACA Y Fenai a Bae Conwy 2004

Metadata Language: English

Lineage: Marine mud and muddy gravel habitats had previously been sampled by Barnes (2003) and CCW in August 2002. The survey was undertaken two hours either side of low water on a good spring tide with transects walked from high to low water, perpendicular to the shore along a bearing. At each sample point (sample station) GPS readings were noted. Information recorded included photograph of sediment surface, sediment type, species found on surface, % cover of fucoids, photograph of profile dug in sediment, species found in profile and infauna detectable by sieving. Sample points were spaced at 25m intervals and sufficient regular transects were sampled to ensure that extent and distribution were described. Survey dates- 02/08/04-03/08/04, historic data was also used from 2002.

Dataset Reference Date (Publication): 2004-12-31

Temporal Extent

Begin date: 2002-08-01

End date: 2004-08-03

Topic category

Biota

Owner

Natural Resources Wales (NRW)

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

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

Originator

Institute of Estuarine and Coastal Studies

University of Hull, Hull, East Yorkshire, HU6 7RX

http://www.hull.ac.uk/iecs/

Extent

Geographic Extent: Wales (WLS)

Vertical Extent

Medin Extent Keyword: benthic boundary layer

Format Type and Description

Documents Documents ()

Specification

[A] Data is held within Excel spreadsheets [B] Spatial TAB Files. [C] Jpeg Images of quadrats and sites [D] Data within Marine Recorder: MRCCW30200000009 / MRCCW30200000007

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: Marine mud and muddy gravel habitats had previously been sampled by Barnes (2003) and CCW in August 2002. The survey was undertaken two hours either side of low water on a good spring tide with transects walked from high to low water, perpendicular to the shore along a bearing. At each sample point (sample station) GPS readings were noted. Information recorded included photograph of sediment surface, sediment type, species found on surface, % cover of fucoids, photograph of profile dug in sediment, species found in profile and infauna detectable by sieving. Sample points were spaced at 25m intervals and sufficient regular transects were sampled to ensure that extent and distribution were described. Survey dates- 02/08/04-03/08/04, historic data was also used from 2002.

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

Menai Strait and Conwy Bay cSAC
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)
marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments)
sediment infauna

Type: Theme

Citation

Date (Publication): 2023-12-31

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

Keywords

SeaDataNet Parameter Discovery Vocabulary

Habitat characterisation
Habitat extent

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: Intertidal monitoring of muddy gravels (LMX.Psyllid) in Menai Strait and Conwy Bay SAC in 2004

NRW Related Title: Marine mud and muddy gravel characterisation in the Menai Strait

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. CCW may release, publish or disseminate it freely.

Use Constraints

Use constraints type: Other restrictions

Other constraints: © CCGC/CCW 2004. 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 CCW'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: 4f4c4942-4343-5764-6473-313031383936 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: 2024-05-31T09:27:23.296Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Data Services Team

Natural Resources Wales (NRW), Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW

http://naturalresourceswales.gov.uk/splash?orig=/

Publishing Body

Access the portal

Full access to the portal and metadata.

Intertidal Monitoring of Muddy gravels (LMX.Psyllid) in Menai Strait and Conwy Bay Special Area of Conservation (SAC) 2004

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