Seabirds at Sea Evidence Base
Adar mor sylfaen tystiolaeth

  • English
  • wel
  • All

GIS layers showing the abundance and distribution of seabirds in welsh waters. The datasets consists of the raw data showing observations of all seabirds and derived grids showing the density of flying and sitting species on a 3km grid scale and the survey coverage. The purpose of this data capture was to collate data from ESAS and WWT Consulting databases to produce combined database of birds recorded from surveys of Welsh waters. Other sources identified were also consulted to produce the most complete representation of the observed distribution of seabirds.

Haenau SGDd (GIS) yn dangos helaethrwydd a dosbarthiad adar môr yn nyfroedd Cymru. Mae’r set ddata’n cynnwys data crai sy’n dangos arsylwadau’n ymwneud â’r holl adar môr a’r gridiau a grëwyd lle y dangosir dwysedd y rhywogaethau sy’n hedfan ac yn eistedd ar raddfa grid 3 cilometr a chwmpas yr arolwg. Pwrpas y gwaith cipio data hwn oedd coladu data o gronfeydd ESAS a WWT Consulting er mwyn cynhyrchu cronfa ddata gyfunol o adar a gofnodwyd mewn arolygon o ddyfroedd Cymru.


Cydnabyddiaeth:

Yn cynnwys gwybodaeth Cyfoeth Naturiol Cymru © Cyfoeth Naturiol Cymru a Hawl Cronfa Ddata. Cedwir pob hawl.

Identification

Dynodydd
Identifier
NRW_DS114722
Teitl Amgen
Alternative Title
  • WWT and ESAS combined seabirds at sea
  • Collated seabird distribution and abundance data in Welsh waters
  • Seabird coverage 3KM WGS84.lyr
  • Seabird WWT ESAS merged flying 3KM WGS84.lyr
  • Seabird WWT ESAS merged sitting 3KM WGS84.lyr
Laith Metadata
Metadata Language
English
Lineage

The two main sources of seabird distribution and abundance data for welsh waters are held in JNCC's European Seabirds at Sea (ESAS) database and the Wildfowl and Wetlands (Consulting) Ltd marine aerial surveys database. A collation for Wales was created by producing a database containing all the fields from both datasets. This was then populated. The data was 'cleaned' to remove non-bird objects and data. A GIS layer was produced and supplied from the database. Density and abundance maps as well as survey coverage were derived from the database using a 3km by 3km grid created in ArcGIS.


A detailed methodology and the approach taken is described in the WWT Report "Collating seabird distribution and abundance data in Welsh waters to support provision of strategic advice on the relative risk of deployment of tidal stream devices".


Originally the density maps were produced to provide evidence about mobile species and their sensitivity to tidal stream devices (See NRW project 309 media 1230). This dataset is an update based on the same methodology but includes all gull species which were not required for the renewables work. The selection of the highest value from the combined JNCC ESAS and WWT datasets for each grid cell is in line with the Precautionary Principle. This may lead to an overestimation of abundance in some grid cells but will reflect the highest potential use of each cell by diving bird species. In addition diving bird density values for each grid cell were standardised according to survey effort so that those grid cells for which there is a very low level of effort may have an overestimation of overall abundance.


It is important to interpret these evidence layers in conjunction with information on the underlying survey effort.
Dyddiad cyfeirnod y set ddata (Cyhoeddiad)
Dataset Reference Date (Publication)
2010-07-01
Perchennog
Owner
  Natural Resources Wales (NRW) -
Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales
http://naturalresources.wales/?lang=en
Cychwynnwr
Originator
  Wildfowl And Wetlands Trust (WWT) -
Wildfowl and Wetlands Trust (WWT), Slimbridge, Gloucestershire, GL2 7BT, England
http://www.wwt.org.uk/
Cychwynnwr
Originator
  Joint Nature Conservancy Committee (JNCC) -
Joint Nature Conservancy Committee (JNCC), Monkstone House, City Road, Peterborough, PE1 1JY
http://www.jncc.gov.uk
 

Extent

Extent

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


 

Vertical Extent

Medin Extent Keyword

troposphere
 
 

Distribution

Dosbarthiad
Distribution

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

    Specification

    Data exists as MapInfo GIS layers and in it's native ArcGIS format

Lleolwr Adnoddau
Resource Locator
Download Data and Web Services ( WWW:LINK-1.0-http--link )
Lleolwr Adnoddau
Resource Locator
Web Mapping Service ( OGC:WMS )
 

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

This dataset has not been assessed for conformance to the referenced INSPIRE regulation.
Degree
false
Lineage

The two main sources of seabird distribution and abundance data for welsh waters are held in JNCC's European Seabirds at Sea (ESAS) database and the Wildfowl and Wetlands (Consulting) Ltd marine aerial surveys database. A collation for Wales was created by producing a database containing all the fields from both datasets. This was then populated. The data was 'cleaned' to remove non-bird objects and data. A GIS layer was produced and supplied from the database. Density and abundance maps as well as survey coverage were derived from the database using a 3km by 3km grid created in ArcGIS.


A detailed methodology and the approach taken is described in the WWT Report "Collating seabird distribution and abundance data in Welsh waters to support provision of strategic advice on the relative risk of deployment of tidal stream devices".


Originally the density maps were produced to provide evidence about mobile species and their sensitivity to tidal stream devices (See NRW project 309 media 1230). This dataset is an update based on the same methodology but includes all gull species which were not required for the renewables work. The selection of the highest value from the combined JNCC ESAS and WWT datasets for each grid cell is in line with the Precautionary Principle. This may lead to an overestimation of abundance in some grid cells but will reflect the highest potential use of each cell by diving bird species. In addition diving bird density values for each grid cell were standardised according to survey effort so that those grid cells for which there is a very low level of effort may have an overestimation of overall abundance.


It is important to interpret these evidence layers in conjunction with information on the underlying survey effort.
 

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
  • abundance
  • European Seabirds at Sea (ESAS)
  • seabirds (see also specific species)(see also shorebirds)
  • Wildfowl and Wetlands Trust (WWT)
  • sitting
  • distributions
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2025-01-08
Code
geonetwork.thesaurus.local.theme.converted_nrw-keywords

Allweddair
Keywords

SeaDataNet Parameter Discovery Vocabulary
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-19
Code
geonetwork.thesaurus.external.theme.rdf+xml

Allweddair
Keywords

IPSV Subjects List
  • Birds
  • Flying
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2020-11-18
Code
geonetwork.thesaurus.external.theme.subjects

Allweddair
Keywords

NRW SMNR Keywords
  • Ecosystem (SMNR)
  • Natural Resources (Incl. Features and Processes) (SMNR)
  • Sea and Coast (SMNR)
  • Animals, Plants and Other Organisms (SMNR)
  • Management Areas (SMNR)
  • Marine (SMNR)
  • Coastal Margins (SMNR)
  • Sustainable Management of Natural Resources (SMNR)
Math
Type
Theme
Theme

Dyfyniad
Citation

Dyddiad (Cyhoeddiad)
Date (Publication)
2024-06-26
Code
geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords
 

Spatial Reference System

Code
Latitude and Longitude (EPSG::4326)
 

Content

Gwybodaeth Cynnwys
Content Information

Proffil CNC
NRW Profile

Elfennau CNC
Custom Elements

 

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 to 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.
 

Attribution Statement

Other constraints

Contains Natural Resources Wales information © Natural Resources Wales and Database Right. All rights Reserved.
 

Licence

Other constraints
Open Government Licence
 
 
 

Metadata

Metadata

Dynodydd Ffeil
File Identifier
4f4c4942-4343-5764-6473-313134373232 XML
Laith Metadata
Metadata Language
English
Math o adnodd
Resource type
Dataset
Dataset
Dyddiad Metadata
Metadata Date
2026-03-03T14:27:54.185Z
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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