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Metadata: 2011 Scottish Natural Heritage (SNH) Scotland Didemnum vexillum records
Abstract:
The carpet sea squirt (Didemnum vexillum) is an invasive non-native species of colonial sea squirt that has recently been found in England, Ireland, Wales and at one location in the Clyde, on the west coast of Scotland. The potential ecological and economic impacts of this species are significant. A rapid response eradication programme in Holyhead Harbour is currently underway, showing signs of some success so far. However, it is not known how far this species has spread within the UK, and surveys are underway in England and Wales to determine its distribution. It is crucial to know as soon as possible how far it has spread, as this information will determine what the appropriate response will be - if it is confined to only a few sites, it may be possible to attempt eradication. If it is already more widespread, then containment or control measures will be more appropriate. No specific surveys targeting this species had previously been carried out in Scotland, so it was not known whether it was present just in the one marina in the Clyde or whether it was more widespread. This project involved a series of rapid assessment surveys of those marinas and harbours thought to be most likely at risk from establishment (e.g. those in the Clyde and on the west coast of Scotland) and will inform SNHâ??s policy for dealing with this species, as well as the wider UK policy for response.
Data holder:
NatureScot (HQ Inverness)
Data Archive for Seabed Species and Habitats (DASSH)
Use constraints:
No restrictions on public access. This survey recorded no species or biotope occurrences that SNH consider as sensitive. All records may therefore be released in response to requests covered by Environmental Information Regulations or Freedom of Information Regulations. Additionally its re use and dissemination is permissible under Open Government Licence terms. Any re use of this data will acknowledge the copyright owner.
| Other details | ||
| Internal code | Internally assigned metadata identifier | 2333 |
| 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. | 2011 Scottish Natural Heritage (SNH) Scotland Didemnum vexillum records |
| 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. | 9c646054b134f38044d4f656a3989772 |
| Resource Identifier | This is the code assigned by the data owner. | DASSHDT00000150 |
| 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 | 2009-11-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2009-11-30 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | inapplicable |
| 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 carpet sea squirt (Didemnum vexillum) is an invasive non-native species of colonial sea squirt that has recently been found in England, Ireland, Wales and at one location in the Clyde, on the west coast of Scotland. The potential ecological and economic impacts of this species are significant. A rapid response eradication programme in Holyhead Harbour is currently underway, showing signs of some success so far. However, it is not known how far this species has spread within the UK, and surveys are underway in England and Wales to determine its distribution. It is crucial to know as soon as possible how far it has spread, as this information will determine what the appropriate response will be - if it is confined to only a few sites, it may be possible to attempt eradication. If it is already more widespread, then containment or control measures will be more appropriate. No specific surveys targeting this species had previously been carried out in Scotland, so it was not known whether it was present just in the one marina in the Clyde or whether it was more widespread. This project involved a series of rapid assessment surveys of those marinas and harbours thought to be most likely at risk from establishment (e.g. those in the Clyde and on the west coast of Scotland) and will inform SNHâ??s policy for dealing with this species, as well as the wider UK policy for response. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Part of MSFD NNS baseline data collation project (Jan 2016). Subset of a dataset as we were only pulling out records for a selection of INNS. Contains records for Didemnum vexillum. Original source: Beveridge, C., Cook, E.J., Brunner, L., MacLeod, A., Black, K. Brown, C. and Manson, F.J. (2011). Initial reponse to the invasive carpet sea squirt, Didemnum vexillum, in Scotland. Scottish Natural Heritage Commissioned Report No. 413 PDF available from: https://www.nature.scot/naturescot-commissioned-report-413-initial-response-invasive-carpet-sea-squirt-didemnum-vexillum https://www.nls.uk/e-monographs/2020/216548241.23.pdf A methodical search of pontoon floats, anchor chains, pilings and any ropes or other items hanging into the water at each location was carried out for signs of D. vexillum by three researchers from the Scottish Association for Marine Science (SAMS). All the pontoons in the marina were inspected using viewing scopes and an underwater camera system operated from the pontoon walkway to collect video (Panasonic Optio W30 camera mounted on 2 m pole) and stills (Panasonic Optio W60 camera). Scrapers with fine mesh nets attached were also used to collect any suspect organisms for closer inspection. Surveys typically lasted between one and two hours depending on the size of the marina or harbour. The most effective survey method was for the group of researchers to stay together, with one person allocated to each of the side pontoons and the third person looking at the main walkway. This allowed instant confirmation by the survey team of any potential sightings of D. vexillum. Any additional non-native species found during the survey were recorded. Weather conditions and visibility of the water column was noted at each location. All the equipment was cleaned with sanitiser and the nets on each scraper changed between locations. Samples requiring verification were collected and preserved in alcohol for later inspection under a stereomicroscope. If any sensitive species or biotope records are present within this dataset, they will have been removed. If you wish to request access to sensitive species records, please contact the metadata contact. The UK Sensitive Species list has been agreed by UK statutory bodies and relevant experts. It can be viewed here https://docs.nbnatlas.org/sensitive-species-list/. Please note sensitive species lists can vary across the UK. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | NDGO0005 | |
| Keyword title | data.gov.uk | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Hydrography |
| 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 | Zoobenthos generic abundance | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Invasive species monitoring parameters | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Biodiversity | |
| 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 | Occasional/Ad Hoc species monitoring | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 55.7773 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.854 |
| South | The southern-most limit of the data resource in decimal degrees | 55.7717 |
| West | The western-most limit of the data resource in decimal degrees | -4.8627 |
| Regional sea | Minches & Western Scotland | |
| 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 | NatureScot (HQ Inverness) | |
| Position name | NatureScot Data Manager | |
| Phone | 01752 633102 | |
| Fax | 01752 633291 | |
| Delivery point | Marine Biological Association of the UK, The Laboratory, Citadel Hill | |
| Postal code | PL1 2PB | |
| City | Plymouth | |
| data_supply@nature.scot | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Data Archive for Seabed Species and Habitats (DASSH) | |
| Position name | Data Manager | |
| Phone | 01752 633102 | |
| Fax | 01752 633291 | |
| Delivery point | Marine Biological Association of the UK, The Laboratory, Citadel Hill | |
| Postal code | PL1 2PB | |
| City | Plymouth | |
| dassh.enquiries@mba.ac.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | NatureScot (HQ Inverness) | |
| Position name | NatureScot Data Manager | |
| data_supply@nature.scot | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Scottish Natural Heritage (SNH), Headquaters | |
| Individual name | Fiona Manson | |
| Position name | Ecologist | |
| Phone | 01463 725000 | |
| Delivery point | Great Glen House, Leachkin Road | |
| Postal code | IV3 8NW | |
| City | Inverness | |
| data_supply@nature.scot | ||
| 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 | NatureScot (HQ Inverness) | |
| Position name | NatureScot Data Manager | |
| data_supply@nature.scot | ||
| 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 | Data Archive for Seabed Species and Habitats (DASSH) | |
| Position name | Data Manager | |
| Phone | 01752 633102 | |
| Fax | 01752 633291 | |
| Delivery point | Marine Biological Association of the UK, The Laboratory, Citadel Hill | |
| Postal code | PL1 2PB | |
| City | Plymouth | |
| dassh.enquiries@mba.ac.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://doi.org/10.17031/64d1054758929 |
| Locator name | Name of the web resource | DOI URL |
| Locator URL | Web address (URL) that links to the resource | http://www.dassh.ac.uk |
| Locator name | Name of the web resource | A link to the DASSH website |
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | otherRestrictions | |
| 20 Limitations on Public Access - Other constraints | This states any limitations on access to the data and uses free text. | No restrictions on public access. This survey recorded no species or biotope occurrences that SNH consider as sensitive. All records may therefore be released in response to requests covered by Environmental Information Regulations or Freedom of Information Regulations. Additionally its re use and dissemination is permissible under Open Government Licence terms. Any re use of this data will acknowledge the copyright owner. |
| 21 Conditions for Access and Use - Use limitation | 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. | Open Government Licence |
| 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. | 2016-02-22 |
| 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. | 2024-12-02 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery metadata standard |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 2.3.8 |