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Metadata: Investigation into Musculus discors Beds in Pen Llyn a'r Sarnau (2011)
Abstract:
This survey was carried out as part of a MSc thesis in September 2011. To provide baseline data on M. discors beds around the LlPeninsula, with four specific aims: Establish the population structure for sample beds from around the LlPeninsula in order to investigate population structure and determine bed longevity. Identify the in-fauna/epi-fauna associated with M. discors beds. Investigate the sedimentation that occurs upon M. discors beds. Provide advice to CCW on whether M. discors should be included within a Local Biodiversity Action Plan for Gwynedd. To determine M. discors population structure and influence on assemblage structure, twenty six, ten centimetre (cm) diameter cores of M. discors, associated fauna and sediment were collected by Seasearch volunteers on SCUBA from four randomly chosen beds in North Wales.were rinsed through a 63 micrometre (sieve with the sediment, M. discors and in-fauna retained. All liquid was retained for later filtration. M. discors were sorted from the sample and length measured to the nearest 0.1 millimetre (mm) using Vernier callipers with epifauna identified and enumerated (Rees et al., 2008). If present, new recruits were sorted from the sample and measured using a calibrated microscope slide (to the nearest 0.1mm). In cases where there were high numbers of recruits, sub-sampling occurred with the abundance and size of a quarter of the total recruit population determined. All associated fauna were identified to the lowest taxonomic level possible.
Data holder:
Hopkinson
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 8814 |
| 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. | Investigation into Musculus discors Beds in Pen Llyn a'r Sarnau (2011) |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | 2011 Hopkins Survey of Musculus Discors beds off the Lleyn Peninsula, North Wales MRCCW31600000008 |
| 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_DS115188 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313135313838 |
| 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 | 2011-04-30 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2011-06-11 |
| 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. | This survey was carried out as part of a MSc thesis in September 2011. To provide baseline data on M. discors beds around the LlPeninsula, with four specific aims: Establish the population structure for sample beds from around the LlPeninsula in order to investigate population structure and determine bed longevity. Identify the in-fauna/epi-fauna associated with M. discors beds. Investigate the sedimentation that occurs upon M. discors beds. Provide advice to CCW on whether M. discors should be included within a Local Biodiversity Action Plan for Gwynedd. To determine M. discors population structure and influence on assemblage structure, twenty six, ten centimetre (cm) diameter cores of M. discors, associated fauna and sediment were collected by Seasearch volunteers on SCUBA from four randomly chosen beds in North Wales.were rinsed through a 63 micrometre (sieve with the sediment, M. discors and in-fauna retained. All liquid was retained for later filtration. M. discors were sorted from the sample and length measured to the nearest 0.1 millimetre (mm) using Vernier callipers with epifauna identified and enumerated (Rees et al., 2008). If present, new recruits were sorted from the sample and measured using a calibrated microscope slide (to the nearest 0.1mm). In cases where there were high numbers of recruits, sub-sampling occurred with the abundance and size of a quarter of the total recruit population determined. All associated fauna were identified to the lowest taxonomic level possible. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Four sites sampled by diver operated core. A total of 26 cores (10cm diameter) taken. Samples processed in laboratory - sieved over 63 micron mesh. All fauna retained and then identified and counted. Musculus discors lengths measured. Confidence in this dataset is moderate as an inexperienced surveyor was used with assistance from experienced surveyors. |
| 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 | musculus discors | |
| 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 | Zoobenthos taxonomy-related counts | |
| 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 | 52.89416 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.6737 |
| South | The southern-most limit of the data resource in decimal degrees | 52.8892 |
| West | The western-most limit of the data resource in decimal degrees | -4.6815 |
| Regional sea | benthic boundary layer | |
| 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 | Hopkinson | |
| Delivery point | Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Penglais, Aberystwyth, Ceredigion, SY23 3DA | |
| ibers@aber.ac.uk | ||
| URL | http://www.aber.ac.uk/en/ibers/ | |
| 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 | Hopkinson | |
| Delivery point | Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Penglais, Aberystwyth, Ceredigion, SY23 3DA | |
| ibers@aber.ac.uk | ||
| URL | http://www.aber.ac.uk/en/ibers/ | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Hopkinson | |
| Delivery point | Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Penglais, Aberystwyth, Ceredigion, SY23 3DA | |
| ibers@aber.ac.uk | ||
| URL | http://www.aber.ac.uk/en/ibers/ | |
| 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`. | This dataset is wholly owned by Lisa Hopkinson, c/o Aberystwyth University However NRW has received permission to 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. | © Lisa Hopkinson 2011 There are no access restrictions to this data. NRW have received permission to release, publish or disseminate it freely. 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. |
| 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. | © Lisa Hopkinson 2011 | |
| https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ | ||
| Available data formats | ||
| Data format | 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. | 2011-09-30 |
| 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 | |