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Metadata: Intertidal Monitoring of Eelgrass (Zostera) Beds in Carmarthen Bay and Estuaries Special Areas of Conservation (SACs) 2009
Abstract:
The Habitats Directive establishes that the management of Special Areas of Conservation (SACs) should aim to achieve the favourable conservation status of habitat and species features listed within its Annex I and Annex II. For SACs in Wales, the Countryside Council for Wales (CCW) is therefore required to report on a regular basis on whether features are in favourable conservation status. Seagrass beds develop in intertidal and shallow subtidal areas on sands and muds. They may be found in marine inlets and bays but also in other areas, such as lagoons and channels, which are sheltered from significant wave action. Eelgrass (Zostera marina), is considered to be scarce (present in 16-100 ten km squares) is protected through the EC Habitats Directive and is classed as a UK Biodiversity Action Plan (BAP) Priority Habitat. Data is captured to support reporting on conservation status of the piddock feature. Carmarthen Bay SAC was designated for five Annex I intertidal habitat features: Estuaries; Mudflats and sandflats not covered by seawater at low tide; Large shallow inlets and bays; Salicornia and other annuals colonising mud and sand; Atlantic salt meadows (Glauco- Puccinellietalia maritimae). Specific areas of interest include areas of eelgrass Zostera noltii in the Burry Inlet and the monitoring aimed to map the area covered by Zostera at the two sites; sample points on a grid across those areas identified to have Zostera to estimate the cover of surface species.
Data holder:
Natural Resources Wales (NRW)
Click on the red button for resource contact details:
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 8793 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Intertidal Monitoring of Eelgrass (Zostera) Beds in Carmarthen Bay and Estuaries Special Areas of Conservation (SACs) 2009 |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | 2009 CCW / ASML Carmarthen Bay SAC intertidal Zostera bed monitoring MRCCW16300000026 |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | NRW_DS114943 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313134393433 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2009-09-25 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2012-09-24 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 50 |
| Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | urn:ogc:def:uom:EPSG::9001 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | The Habitats Directive establishes that the management of Special Areas of Conservation (SACs) should aim to achieve the favourable conservation status of habitat and species features listed within its Annex I and Annex II. For SACs in Wales, the Countryside Council for Wales (CCW) is therefore required to report on a regular basis on whether features are in favourable conservation status. Seagrass beds develop in intertidal and shallow subtidal areas on sands and muds. They may be found in marine inlets and bays but also in other areas, such as lagoons and channels, which are sheltered from significant wave action. Eelgrass (Zostera marina), is considered to be scarce (present in 16-100 ten km squares) is protected through the EC Habitats Directive and is classed as a UK Biodiversity Action Plan (BAP) Priority Habitat. Data is captured to support reporting on conservation status of the piddock feature. Carmarthen Bay SAC was designated for five Annex I intertidal habitat features: Estuaries; Mudflats and sandflats not covered by seawater at low tide; Large shallow inlets and bays; Salicornia and other annuals colonising mud and sand; Atlantic salt meadows (Glauco- Puccinellietalia maritimae). Specific areas of interest include areas of eelgrass Zostera noltii in the Burry Inlet and the monitoring aimed to map the area covered by Zostera at the two sites; sample points on a grid across those areas identified to have Zostera to estimate the cover of surface species. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | There were two known areas of Zostera noltii - a bed on Llanrhidian Sands and a second at Penrhyn Gwyn. In order to assess the quality of the beds, grids oriented north-south and east-west, with stations spaced at 50 m intervals, were created for each area. The station coordinates were uploaded to handheld GPS units and either two or three surveyors went to each position in turn. At each station a 0.25 m2 quadrat (0.5 m x 0.5 m) was placed randomly 5 times within a radius of approximately 10 m. Random locations were achieved by standing at the station position and throwing the quadrat behind the surveyor. Digital photographs were taken of each quadrat, so that the quadrat filled the frame, and the photograph number was recorded. A count was made of the number of quadrats out of the five in which either Zostera or Spartina was present. In the first quadrat only, the following were recorded: Percentage cover of: Substratum (Mud, sand, gravel, cobble); Standing water; Zostera noltii; Green algae; Mytilus edulis; Spartina anglica; Salicornia. Zostera of less than 5% cover was recorded as One plant, Few plants or Many plants; Cerastoderma edule (None, less than 100/m2, greater than 100/m2); The depth of the black layer in centimetres (measured with a ruler); Other species or features were recorded as Present; The presence of Zostera within a 3 m radius. Zostera beds were previously mapped in 2004. Data quality and confidence was considered high as all surveys were completed by professionals and experienced marine field surveyors. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Species distribution |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Carmarthen Bay and Estuaries SAC | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | intertidal | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | seagrasses (see also potamogetonaceae and hydrocharitaceae) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | zostera noltii | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | zostera | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Macroalgae and seagrass taxonomy-related counts | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat extent | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Monitoring | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 51.66478253 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.12299854 |
| South | The southern-most limit of the data resource in decimal degrees | 51.62822021 |
| West | The western-most limit of the data resource in decimal degrees | -4.21850763 |
| Regional sea | benthic boundary layer | |
| ABERTAWE - SWANSEA | ||
| SIR GAERFYRDDIN - CARMARTHENSHIRE | ||
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Countryside Council for Wales (CCW). Marine and Freshwater Ecosystems Group | |
| Delivery point | Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@ccw.gov.uk | ||
| URL | http://www.ccw.gov.uk | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Aquatic Survey and Monitoring Ltd (ASML) | |
| Delivery point | Whitfield Brow, Bollihope, Frosterley, Weardale, Co. Durham, DL13 2SZ, England | |
| tom@aquatic-environments.co.uk | ||
| URL | http://www.marineseen.com/aquatic_survey_and_monitoring.htm | |
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | This states any limitations on access to the data. Multiple occurences are allowed here. One entry shall be from the INSPIRE Metadata registry and the other free text should be part of the resource `Have specific limitations`. | The following data is considered OS derived data and is therefore jointly owned by NRW and the Ordnance Survey. NRW may release, publish or disseminate this data freely; providing recipients are made aware of use restrictions (See general use restrictions). |
| no limitations | ||
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | © CNC/NRW and © Crown copyright 2012. All rights reserved. Natural Resources Wales, AC0000849444 Third parties seeking to re-use this data require a Licence issued by NRW. It allows re-use, reproduction and dissemination in any format or medium but only for non-commercial purposes, according to the terms and conditions of the Licence. Those seeking commercial re-use require a commercial licence available from the OS. |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Documents |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2012-06-30 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-03-03 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |
| Metadata parent | NRW_DS109834 | |