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

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.

Identifier: NRW_DS121783

Alternative Title

Carmarthen Bay data 2016 - 2017
Data Bae Caerfyrddin 2016 - 2017

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.

Dataset Reference Date (Publication): 2017-12-31

Temporal Extent

Begin date: 2016-01-11

End date: 2017-01-03

Topic category

Environment

Owner

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Originator

APEM Ltd

APEM Remote Sensing, Riverview, A17 Embankement Buisness Park, Heaton Mersey, Stockport, SK4 3GN

http://www.apemltd.co.uk

Extent

Geographic Extent: Wales (WLS)

Format Type and Description

Geographic Information System Geographic Information System ()

Specification

ESRI Feature Class

Data quality

Quality Scope: Dataset

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

GEMET - INSPIRE themes, version 1.0

Type: Theme

Citation

Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus

common scoter (black scoter)
melanitta nigra
aerial photography (air photography) (aerial photographs)
aerial surveys
Carmarthen Bay
Carmarthen Bay and Estuaries SAC

Type: Theme

Citation

Date (Publication): 2023-12-31

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Code: Latitude and Longitude (EPSG::4326)

Content Information

NRW Profile

Custom Elements

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

Constraints

Limitations on Public Access and Use

Restriction type: 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

Use constraints type: 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

File Identifier: 4f4c4942-4343-5764-6473-313231373833 XML

Metadata Language: English

Resource type: Dataset

Metadata Date: 2024-05-31T09:16:12.243Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Publishing Body

Access the portal

Full access to the portal and metadata.

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

Identification

Temporal Extent

Extent

Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body