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Metadata: Tremadog Bay Subtidal Macrobenthic Study
Abstract:
The Habitats Directive establishes that the management of Special Area of Conservation (SACs) should aim to achieve the 'Favourable Conservation Status' (FCS) of habitats and species as defined in the Directive. In the case of SACs, the features to which FCS applies are the habitats and/or species listed in Annex I and Annex II of the Habitat Directive for which the individual site has been selected. Infaunal monitoring work is required to provide management feedback and enable reporting on the FCS of infaunal aspects of SACs, Special Protection Areas (SPAs: Birds Directive) and Special Sites of Scientific Interest (SSSI). The aim of this data capture was to gather repeatable data to provide reference conditions and to support the identification of the two characteristics of the Pen Llyn a'r Sarnau large shallow inlet and bays feature. Tremadog Bay a large shallow Inlet and Bay within the Pen Llyn a'r Sarnau SAC. Two important characteristics of this feature have been identified. These are: 1. The variety of subtidal sediment communities within the large shallow inlet and bay 2. The species richness and diversity of the sublittoral mixed sediment south west of Pwllheli
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 | 8615 |
| 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. | Tremadog Bay Subtidal Macrobenthic Study |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | 2004 CCW Tremadog Bay sublittoral sediment survey MRCCW3010000000F, 2005 CCW Tremadog Bay sublittoral sediment survey MRCCW3010000000E |
| 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_DS109835 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313039383335 |
| 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 | 2004-05-24 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2005-04-14 |
| 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 Area of Conservation (SACs) should aim to achieve the 'Favourable Conservation Status' (FCS) of habitats and species as defined in the Directive. In the case of SACs, the features to which FCS applies are the habitats and/or species listed in Annex I and Annex II of the Habitat Directive for which the individual site has been selected. Infaunal monitoring work is required to provide management feedback and enable reporting on the FCS of infaunal aspects of SACs, Special Protection Areas (SPAs: Birds Directive) and Special Sites of Scientific Interest (SSSI). The aim of this data capture was to gather repeatable data to provide reference conditions and to support the identification of the two characteristics of the Pen Llyn a'r Sarnau large shallow inlet and bays feature. Tremadog Bay a large shallow Inlet and Bay within the Pen Llyn a'r Sarnau SAC. Two important characteristics of this feature have been identified. These are: 1. The variety of subtidal sediment communities within the large shallow inlet and bay 2. The species richness and diversity of the sublittoral mixed sediment south west of Pwllheli |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | A total of 115 samples were obtained at 39 sites within Tremadog Bay over a 2 year period. Analysis of samples produced a list of all benthic fauna (infauna and epifauna). In addition sediment composition was described. Biotopes were also assigned to each sample based on the classification of Connor et al, 2004. The sample stations were designed on a grid system, with additional stations created on known mixed sediment areas and additional areas or particular interest. Grab samples were collected with a 0.1m2 day grab. 2 or more samples were collected at each station, with 6 replicates taken in mixed sediment areas. A granulometry sample was taken from one of the grabs. Grab samples are sieved on board the survey vessel, through a 0.5mm mesh sieve, Samples with a large amount of coarse material were put through a 1mm mesh sieve first to speed up the process. The sieved material was then fixed on 10% formalin solution. Macrofaunal and particle size distribution analysis of the grab samples was completed under contract to EMU Ltd. Following the macrobenthic analysis, biotopes were assigned to each sampling station. |
| 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 | large shallow inlet and bay | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | sediment infauna | |
| 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 | Tremadog Bay | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | sediment epifauna | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | marine sediments (coastal sediments) (intertidal sediments) (subtidal sediments) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | macrobenthos | |
| 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 | Sediment grain size parameters | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zoobenthos taxonomic abundance | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat characterisation | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 52.92059091 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.12214602 |
| South | The southern-most limit of the data resource in decimal degrees | 52.70156046 |
| West | The western-most limit of the data resource in decimal degrees | -4.44180642 |
| Regional sea | 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 | |
| Delivery point | Enquiries Unit, Maes y Fynnon, 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 on 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 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. |
| 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. | Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved. | |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Documents |
| Format in which digital data can be provided for transfer | Database | |
| Format in which digital data can be provided for transfer | Image | |
| Format in which digital data can be provided for transfer | Delimited | |
| 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. | 2008-04-30 |
| 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_DS114501 | |