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Metadata: Volunteer Diver Seagrass Zostera marina Surveys Porth Dinllaen (2009)
Abstract:
Seagrass is the only marine flowering plant found subtidally in the UK and seagrass beds are considered of National importance. In 2009 Zostera marina was the focus of former Countryside Council for Wales (CCW), now part of Natural Resources Wales (NRW), volunteer dive surveys at Porth Dinllaen in Pen Llyn a'r Sarnau Special Area of Conservation (SAC) to estimate the extent of the bed. The survey is a continuation of a 2008 pilot, and is due to be re-surveyed before 2012 to start to build up a picture of variation in the extent of the seagrass bed at the site. The main objectives of this project were to: 1. Test methods to measure extent of large seagrass beds using volunteers 2. Estimate density and measure depth of live seagrass in different parts of the bed 3. Make note of any unusual features of the seagrass bed 4. Compare with results and success of 2008 surveys.
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 | 8736 |
| 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. | Volunteer Diver Seagrass Zostera marina Surveys Porth Dinllaen (2009) |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | 2009 CCW Porth Dinllaen Seagrass Survey MRMES00200000011, Seagrass surveys in Porth Dinllaen |
| 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_DS111487 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313131343837 |
| 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 | 2009-06-14 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2009-07-05 |
| 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'. | annually |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Seagrass is the only marine flowering plant found subtidally in the UK and seagrass beds are considered of National importance. In 2009 Zostera marina was the focus of former Countryside Council for Wales (CCW), now part of Natural Resources Wales (NRW), volunteer dive surveys at Porth Dinllaen in Pen Llyn a'r Sarnau Special Area of Conservation (SAC) to estimate the extent of the bed. The survey is a continuation of a 2008 pilot, and is due to be re-surveyed before 2012 to start to build up a picture of variation in the extent of the seagrass bed at the site. The main objectives of this project were to: 1. Test methods to measure extent of large seagrass beds using volunteers 2. Estimate density and measure depth of live seagrass in different parts of the bed 3. Make note of any unusual features of the seagrass bed 4. Compare with results and success of 2008 surveys. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Data is captured by using volunteer divers who are CMAS 2 star qualified or equivalent with a minimum of 60 dives each. Volunteers estimated the extent of large seagrass beds using rapid unmarked transects analysis, using a GPS surface tracking buoy, noting the time and depth of features of the seagrass bed (eg: where the bed starts or stops, or the position of 'mooring scars'). This method was compared with the success when some divers swam towards a fixed underwater acoustic marker (transponder) with a homing device, noting the distance and bearing to the transponder to note the key features. Wherever possible, quadrats were taken at stations along transects and the presence of flowering, seeding and wasting were noted, together with any associated, potentially threatening or BAP species. Survey methods and success were compared to the 2008 survey methods and results, and the technique's feasibility for future volunteer surveys discussed. |
| 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 | eelgrass | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | posidoniaceae | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | zostera marina | |
| 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 | Pen Llyn a'r Sarnau cSAC | |
| 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 | Porth Dinllaen | |
| 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 | Volunteers | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 52.94793877 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.54814949 |
| South | The southern-most limit of the data resource in decimal degrees | 52.93950272 |
| West | The western-most limit of the data resource in decimal degrees | -4.56605 |
| 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 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 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 2009. 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. |
| 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. Contains Ordnance Survey Data. Ordnance Survey Licence number AC0000849444. Crown Copyright and Database Right. | |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Database |
| Format in which digital data can be provided for transfer | Geographic Information System | |
| Format in which digital data can be provided for transfer | Documents | |
| Format in which digital data can be provided for transfer | Delimited | |
| Format in which digital data can be provided for transfer | Image | |
| 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. | 2009-12-31 |
| 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. | 2026-03-05 |
| 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 | |