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Metadata: Monitoring of Algal Diversity and Richness on the Glacial Moraine of Sarn Badrig
Abstract:
Sarn Badrig (St Patrick's Causeway) is a belt reef running in a south-westerly direction approximately 18 km out from Mochras Point near Harlech. This reef forms part of the Pen Llyn a'r Sarnau Special Area of Conservation (SAC) protected under the EC Habitats Directive. The reef is composed of glacial moraine deposits and is exposed in patches at low water along most of its length. The reef structure is very mobile and subject to tidal currents, wave action and sand scour and therefore many of the seaweeds found on the reef are annual or perennial species able to survive the scoured conditions. These include a number of rare species that would be overgrown by species that would normally establish on more stable reef environment. The purpose of this data capture was to map the distribution of substratum types and select biological indices. Also to assess and determine a suitable methodology to monitor algal richness within a benthic habitat of dynamic substrata. The site will only be assessed for its algae richness and diversity every 2 years.
Data holder:
Natural Resources Wales (NRW)
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 8686 |
| 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. | Monitoring of Algal Diversity and Richness on the Glacial Moraine of Sarn Badrig |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Sarn Badrig algae diversity and richness |
| 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_DS110947 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313130393437 |
| 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 | 2005-06-09 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2009-12-31 |
| 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'. | biannually |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Sarn Badrig (St Patrick's Causeway) is a belt reef running in a south-westerly direction approximately 18 km out from Mochras Point near Harlech. This reef forms part of the Pen Llyn a'r Sarnau Special Area of Conservation (SAC) protected under the EC Habitats Directive. The reef is composed of glacial moraine deposits and is exposed in patches at low water along most of its length. The reef structure is very mobile and subject to tidal currents, wave action and sand scour and therefore many of the seaweeds found on the reef are annual or perennial species able to survive the scoured conditions. These include a number of rare species that would be overgrown by species that would normally establish on more stable reef environment. The purpose of this data capture was to map the distribution of substratum types and select biological indices. Also to assess and determine a suitable methodology to monitor algal richness within a benthic habitat of dynamic substrata. The site will only be assessed for its algae richness and diversity every 2 years. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Algae diversity and richness monitoring at Sarn Badrig is conducted in 2 stages. Stage 1, habitat mapping and stage 2, algal richness. The site is marked with a permanent tripod structure and provides a reference point for mapping the surrounding substrata. An area 25 m x 25 m is marked out North East of the tripod marker and at 5 m intervals a quadrat is used to record the substratum (percentage cover of sand, gravel, pebbles and boulder) and biota features (percentage cover of algal turf, presence/absenceof H.siliquosa and Laminaria spp). Also recorded is how representative the area is of the habitat MIR.HalXK. This process is repeated North West, South West and South East of the marker to form a 50 m x 50 m area with the marker in the centre. A total of 100 quadrats are completed. The area that is most representative of the habitat MIR.HalXK is selected for monitoring algal richness. Its distance and bearing from the pyramid is recorded. Due to the difficulty of identifying algae species in-situ within a limited time period, different methods of measuring species richness were investigated in 2005. In 2007, 2 divers each used a 0.25 m quadrat to record algal species, in 10 min intervals up to one hour. The quadrat is used as a tool to focus the search and is moved around the sector by the divers. Detailed methodologies can be found in Marine Monitoring Report 25b (standard operating procedures 7 and 8 for the 2005 methods). Established as Life Monitoring Trials - CCW report 380, chapter 3.1.1 Contract Science Report 380, followed by contracted Across Wales diving project. Whilst most species were identified in situ, some were gathered for subsequent laboratory analysis using algal identification keys and microscope. Samples of algae were pressed, scanned on a flat-bed colour scanner and incorporated into the CCW herbarium. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitats and biotopes |
| 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 | marine monitoring (see also marine surveys) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | algae | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Special Area of Conservation Monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sarn Badrig Reef | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Pen Llyn a'r Sarnau cSAC | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | quadrats | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Biodiversity Action Plan (BAP) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | community richness | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Macroalgae generic abundance in water bodies | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 52.788223 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.145958 |
| South | The southern-most limit of the data resource in decimal degrees | 52.69156 |
| West | The western-most limit of the data resource in decimal degrees | -4.355365 |
| Regional sea | benthic boundary layer | |
| Irish Sea | ||
| Cardigan Bay | ||
| Tremadog Bay | ||
| GWYNEDD - GWYNEDD | ||
| 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 | Various including volunteer recorders | |
| Delivery point | c/o Natural Resources Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresourceswales.gov.uk/splash?orig=/ | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | CCW Marine Monitoring Team | |
| Delivery point | Countryside Council for Wales, Maes y Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresourceswales.gov.uk/splash?orig=/ | |
| 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`. | There are no access restrictions to this data. NRW may release, publish or disseminate it freely. |
| 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 2009 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 NRW'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. |
| 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. | 2009-08-01 |
| 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_DS109743 | |