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Metadata: Colonisation, Growth and Interactions of Carpet Sea Squirt (Didemnum vexillum)
Abstract:
The Carpet Sea Squirt (Didemnum vexillum) is a Invasive Non Native (INN) filter feeding marine invertebrate that forms large colonies carpetting hard structures on which it grows. Carpet Sea Squirt (Didemnum vexillum) was only confirmed in British waters in 2008. However, there are strong concerns that it will quickly colonise a much wider area as it has been found to do in other countries such as New Zealand and the USA. After an initial survey to identify the extent of colonisation, an eradication programme was undertaken by the Countryside Council for Wales. A programme of monitoring was initiated to measure the success of the eradication experiment and subsequent recolonisation and a research project undertaken in conjunction with Bangor University. The purpose of this data capture was to assess patterns of settlement, growth, colonisation and species interactions of Didemnum vexillum within Holyhead Marina from season to season. Also to look at how different disturbance magnitudes have negative or positive effects on Didemnum vexillum settlement and recruitment.
Data holder:
University of Wales, Bangor. School of Ocean Sciences
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 | 8789 |
| 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. | Colonisation, Growth and Interactions of Carpet Sea Squirt (Didemnum vexillum) |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Colonisation, growth and species interactions of a successful non-indigenous marine invader Didemnum vexillum. |
| 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_DS114860 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-313134383630 |
| 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 | 2011-05-17 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2012-01-25 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 10 |
| Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | urn:ogc:def:uom:EPSG::9001 |
| 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 a Invasive Non Native (INN) filter feeding marine invertebrate that forms large colonies carpetting hard structures on which it grows. Carpet Sea Squirt (Didemnum vexillum) was only confirmed in British waters in 2008. However, there are strong concerns that it will quickly colonise a much wider area as it has been found to do in other countries such as New Zealand and the USA. After an initial survey to identify the extent of colonisation, an eradication programme was undertaken by the Countryside Council for Wales. A programme of monitoring was initiated to measure the success of the eradication experiment and subsequent recolonisation and a research project undertaken in conjunction with Bangor University. The purpose of this data capture was to assess patterns of settlement, growth, colonisation and species interactions of Didemnum vexillum within Holyhead Marina from season to season. Also to look at how different disturbance magnitudes have negative or positive effects on Didemnum vexillum settlement and recruitment. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Two experiments were implemented. Fixed quadrats (0.5x1m2) were set up in 2009. Disturbance quadrats (30x30cm2) were set up in 2011. Each cell was recorded using a video camera on a monthly basis. Still images of each cell were extracted from the video and the images re-sized, stretched and \stitched\" together to give and image of the full quadrat. Percentage cover of Didemnum vexillum could the be recorded along with cover of 4 key taxonomic groups (solitary ascidians; bivalves; sponges; and macroalgae). CCW have also established a temperature logger within the vicinity of the research work. The current research is written up as part of an unpublished Graduate Research project Alun G. (2012)." |
| 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 | colonial sea squirt | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | non-native species | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Didemnum vexillum | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | invasive species (alien species) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Holyhead | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zoobenthos taxonomic abundance | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.32210927 |
| East | The eastern-most limit of the data resource in decimal degrees | -4.64053809 |
| South | The southern-most limit of the data resource in decimal degrees | 53.31871806 |
| West | The western-most limit of the data resource in decimal degrees | -4.64566635 |
| Regional sea | SIR YNYS MON - ISLE OF ANGLESEY | |
| 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 | University of Wales, Bangor. School of Ocean Sciences | |
| Delivery point | Bangor, Gwynedd, LL57 2DG | |
| oss011@bangor.ac.uk | ||
| URL | http://www.bangor.ac.uk | |
| 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 | University of Wales, Bangor. School of Ocean Sciences | |
| Delivery point | Bangor, Gwynedd, LL57 2DG | |
| oss011@bangor.ac.uk | ||
| URL | http://www.bangor.ac.uk | |
| 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 | 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`. | This data is jointly owned by NRW and Bangor University. 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 and Bangor University 2012. 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 the copyright of NRW/ Bangor University 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. | © CNC/NRW and Bangor University 2012 | |
| 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 | Movie |
| 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. | 2012-06-30 |
| 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 |