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In the UK the Common Scoter (Melanitta nigra) is recognised as a nationally threatened species due to its small and declining breeding population. Carmarthen Bay is an internationally important wintering ground for the Common Scoter duck (Melanitta nigra) and is widely regarded as the most important such site in the UK causing the site to be proposed as a Special Protection Area (pSPA) under the EC Birds Directive. Carmarthen Bay is considered to support peak numbers of 17000 - 24000 birds. The Common Scoter is strongly migratory and often travels considerable distances over land making brief stop-overs on inland waters. Its diet consists predominantly of molluscs, especially during the winter, although it occasionally takes other aquatic invertebrates such as crustaceans (e.g. barna cles and shrimps), worms, echinoderms, isopods, amphipods and insects (e.g. midges and caddis flies) as well as small fish and fish eggs. An extensive macrofauna sampling survey was undertaken to coincide with an aerial scoter survey. Conservation concerns for the scoter population focus on threats of hunting pressure, breeding habitat disturbance and loss, food chain contaminants, oil spills and the threat to non-breeding habitats represented by offshore developments. The aim of this project was to investigate the biological and physical factors affecting the winter distribution of common scoter in Carmarthen Bay and to identify what component of the benthos they feed upon. The identification of such components is crucial to the future management and monitoring of the Carmarthen Bay Special Protection Area and, to some extent, the Special Area of Conservation.
Natural Resources Wales (NRW)
There are no access restrictions to this data. CCW may release, publish or disseminate it freely.
Other details | ||
Internal code | Internally assigned metadata identifier | 1741 |
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. | Food sources for Common Scoter (Melanitta nigra) in Carmarthen Bay |
Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Ffynonellau bwyd i'r for - hwyaden ddu ym Mae Caerfyrddin |
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. | 4f4c4942-4343-5764-6473-303837313839 |
Resource Identifier | This is the code assigned by the data owner. | 87189 |
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 | 2004-02-24 |
End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2004-03-05 |
Vertical extent (min) | A positive or negative decimal number, for example, the shallowest depth recorded if subtidal, or, if intertidal, the lowest point recorded. | -19.3 |
Vertical extent reference | This descibes the vertical coordinate reference system as referred to in the EPSG register of geodetic parameters. (epsg-registry.org) | urn:ogc:def:crs:EPSG:: |
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. | In the UK the Common Scoter (Melanitta nigra) is recognised as a nationally threatened species due to its small and declining breeding population. Carmarthen Bay is an internationally important wintering ground for the Common Scoter duck (Melanitta nigra) and is widely regarded as the most important such site in the UK causing the site to be proposed as a Special Protection Area (pSPA) under the EC Birds Directive. Carmarthen Bay is considered to support peak numbers of 17000 - 24000 birds. The Common Scoter is strongly migratory and often travels considerable distances over land making brief stop-overs on inland waters. Its diet consists predominantly of molluscs, especially during the winter, although it occasionally takes other aquatic invertebrates such as crustaceans (e.g. barna cles and shrimps), worms, echinoderms, isopods, amphipods and insects (e.g. midges and caddis flies) as well as small fish and fish eggs. An extensive macrofauna sampling survey was undertaken to coincide with an aerial scoter survey. Conservation concerns for the scoter population focus on threats of hunting pressure, breeding habitat disturbance and loss, food chain contaminants, oil spills and the threat to non-breeding habitats represented by offshore developments. The aim of this project was to investigate the biological and physical factors affecting the winter distribution of common scoter in Carmarthen Bay and to identify what component of the benthos they feed upon. The identification of such components is crucial to the future management and monitoring of the Carmarthen Bay Special Protection Area and, to some extent, the Special Area of Conservation. |
Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Guided by a previous aerial scoter survey on the 25 January 2004, a stratified random sampling strategy was used to sample the benthos in 50 2x2 km grid cells using a Day Grab. In addition a series (8) of 2m beam trawls and 6 intertidal samples were taken to sample potential epifaunal and lower intertidal prey respectively. Biological data were recorded on a suite of epifauna, bivalve and macroinfauna biomass, shell length and bivalve abundance (count) and individual bivalve taxa abundance. An aerial survey was undertaken on the 28th February, 2004. |
Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | Previous work on scoters in the Carmarthen Bay include; Woolmer (2003) report and data from Unpublished PhD Thesis - Media 207; ABP (2000) Data from Bristol Channel marine Aggregates: Resources and constraints research project (Wales Assembly Government Report)- Media 207; Woolmer et al (2001) Two PhD studentships investigated the benthos and Scoter populations of Carmarthen Bay, in response to concerns stimulated by the consequences of the Sea Empress oil spill of February 1996- Media 221; Smyth (2003) Unpublished MSc Thesis-Media 227. |
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 | Shellfish morphology, age and physiology | |
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 | Marine Environmental Data and Information Network | |
Geographical coverage | ||
North | The northern-most limit of the data resource in decimal degrees | 51.75118019 |
East | The eastern-most limit of the data resource in decimal degrees | -4.28228079 |
South | The southern-most limit of the data resource in decimal degrees | 51.54092085 |
West | The western-most limit of the data resource in decimal degrees | -4.68592506 |
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) | |
Phone | 0300 065 3000 | |
Delivery point | Maes-y-Ffynnon | |
Postal code | LL57 2DW | |
Role | The distributor is the person or organisation that distributes the resource. | distributor |
Organisation name | Natural Resources Wales (NRW) | |
Phone | 0300 065 3000 | |
Delivery point | Maes-y-Ffynnon | |
Postal code | LL57 2DW | |
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) | |
Phone | 0300 065 3000 | |
Delivery point | Maes-y-Ffynnon | |
Postal code | LL57 2DW | |
Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
Organisation name | Swansea University, Dept of Biological Sciences | |
Phone | 01792 205678 | |
Postal code | SA2 8PP | |
Dataset constraints | ||
20 Limitations on Public Access - Access constraints | ISO restriction code chosen from ISO 19115-1 Codelist | otherRestrictions |
20 Limitations on Public Access – Other constraints | Any restriction on the use of the resource such as the need to agree to certain licence conditions. | There are no access restrictions to this data. CCW may release, publish or disseminate it freely. |
21 Conditions for Access and Use - Use limitation | Any restrictions imposed on accessing the resource such as the need to agree to certain licence conditions. | © CCGC/CCW 2004. 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 CCW'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. |
Available data formats | ||
Data format | Format in which digital data can be provided for transfer | Documents |
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. | 2004-10-31 |
Date of last revision | The most recent date that the resource was revised. | 2004-10-31 |
Metadata date | The date when the content of this metadata record was last updated. | 2018-07-03 |
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 | Version 2.3.8 |
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