Carmarthen Bay common scoter (Melanitta nigra) data from the winter 2016 - 2017

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  • wel
  • All

This is data of common scoter locations collected by contractors APEM from aerial survey in the winter of 2016 to 2017. Carmarthen Bay Special Protection Area (SPA) was the first fully marine SPA in the UK; it includes areas of sea, coast and estuary that support a wide range of different marine habitats and wildlife. The SPA was designated in June 2003 solely for wintering common scoter (Melanitta nigra) and is the most important individual wintering site in Britain and Ireland for this species. To properly manage and report on the condition of the SPA, accurate population estimates are needed.

Identification

Dynodydd
Identifier
NRW_DS121783
Teitl Amgen
Alternative Title
  • Carmarthen Bay data 2016 - 2017
  • Data Bae Caerfyrddin 2016 - 2017
Laith Metadata
Metadata Language
English
Lineage

Two high resolution aerial digital surveys were conducted of Carmarthen Bay SPA, one in December 2016 and one in February 2017. The aerial survey design was based on an irregular grid with 2 cm Ground Sampling Distance (GSD) resolution, designed to deliver approximately 22% coverage of the SPA and a high statistical modelling precision. Up-to-date ‘procedural guidelines’ and site-specific ‘standard operating procedures’ were developed and adhered to during the aerial digital surveys. The target species was common scoter, but other species present in large numbers during both aerial digital surveys included large gulls, small gulls and waders. Several marine mammals (including porpoises and / or dolphin species and phocids) were also recorded. Aerial digital survey results from December 2016 produced a population estimate of 35,211 (with lower and upper 95% confidence limits of 19,283 and 66,875 respectively). The February 2017 aerial digital survey results produced a population estimate of 36,314 (with lower and upper 95% confidence limits of 19,360 and 74,701 respectively). The February 2017 population estimate likely represents the peak abundance estimate for common scoter utilising Carmarthen Bay SPA during 2016/17. Common scoters were assessed to be in ‘Favourable Condition’ as the latest five-year mean peak far exceeded the SPA’s designated total of 16,946 individuals. As these aerial digital surveys covered the whole of Carmarthen Bay SPA, they do not only provide an estimated population size which is repeatable and comparable to previous/further surveys, but also the opportunity to analyse spatio-temporal distribution and trends.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2017-12-31
Perchennog
Owner
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  APEM Ltd
APEM Remote Sensing, Riverview, A17 Embankement Buisness Park, Heaton Mersey, Stockport, SK4 3GN
http://www.apemltd.co.uk
 

Extent

Extent

Hyd
Geographic Extent
Wales (WLS)
N
W
E
S
Map representing the geographic extent of the dataset


 
 

Distribution

Fformat - Math a Disgrifiad
Format Type and Description
  • Geographic Information System ()

    Specification

    ESRI Feature Class

 

Quality

Ansawdd Data
Data quality

Cwmpas Ansawdd
Quality Scope
Dataset
Dataset
Cydymffurfiad
Conformity
Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
Explanation
Degree
false
Lineage

Two high resolution aerial digital surveys were conducted of Carmarthen Bay SPA, one in December 2016 and one in February 2017. The aerial survey design was based on an irregular grid with 2 cm Ground Sampling Distance (GSD) resolution, designed to deliver approximately 22% coverage of the SPA and a high statistical modelling precision. Up-to-date ‘procedural guidelines’ and site-specific ‘standard operating procedures’ were developed and adhered to during the aerial digital surveys. The target species was common scoter, but other species present in large numbers during both aerial digital surveys included large gulls, small gulls and waders. Several marine mammals (including porpoises and / or dolphin species and phocids) were also recorded. Aerial digital survey results from December 2016 produced a population estimate of 35,211 (with lower and upper 95% confidence limits of 19,283 and 66,875 respectively). The February 2017 aerial digital survey results produced a population estimate of 36,314 (with lower and upper 95% confidence limits of 19,360 and 74,701 respectively). The February 2017 population estimate likely represents the peak abundance estimate for common scoter utilising Carmarthen Bay SPA during 2016/17. Common scoters were assessed to be in ‘Favourable Condition’ as the latest five-year mean peak far exceeded the SPA’s designated total of 16,946 individuals. As these aerial digital surveys covered the whole of Carmarthen Bay SPA, they do not only provide an estimated population size which is repeatable and comparable to previous/further surveys, but also the opportunity to analyse spatio-temporal distribution and trends.
 

Keywords

Allweddair
Keywords

GEMET - INSPIRE themes, version 1.0
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2008-06-01
Code
geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Allweddair
Keywords

NRW Thesaurus
  • common scoter (black scoter)
  • melanitta nigra
  • aerial photography (air photography) (aerial photographs)
  • aerial surveys
  • Carmarthen Bay
  • Carmarthen Bay and Estuaries SAC
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2023-12-31
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords
 

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

NRW Related Title

Census of common scoter in Carmarthen Bay SPA: winter 2016 - 2017
 

Constraints

Constraints

Limitations on Public Access and Use

Math o Gyfyngiad
Restriction type
Other restrictions
Other restrictions
 

Access Constraints Directive

Limitations
no limitations
 

Access Constraints Text

Other constraints

There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
 

Use Constraints

Cyfyngiadau Defnyddio
Use constraints type
Other restrictions
Other restrictions
Other constraints

© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. Attribution statement: Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313231373833 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2024-05-31T09:16:12.243Z
Enw Safonol Metadata
Metadata Standard Name
NRW
Fersiwn Metadata
Metadata Standard Version

1.0

Pwynt Cyswllt
pointOfContact
  Natural Resources Wales (NRW)
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
 
 

Publishing Body

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