Tir Cynnal and Tir Gofal Monitoring and Evaluation Programme: Field-scale winter surveys of yellowhammers
Dataset records observations of species collected whilst undertaking field survey for Tir Cynnal and Tir Gofal Monitoring and Evaluation Programme: Field-scale winter surveys of yellowhammers. Records have been aggregated to display the presence of observed species per 1km² as a single instance i.e. multiple instances of a species will only be represented once per 1km².
The dataset does not represent a national distribution and reflects a limited number of survey sites. More information can be found at: http://wales.gov.uk/topics/environmentcountryside/farmingandcountryside/farming/ schemes/glastir/tircynnal-tirgofal-monitoring-evaluation/?lang=en (EN), http://wales.gov.uk/topics/environmentcountryside/farmingandcountryside/farming/ schemes/glastir/tircynnal-tirgofal-monitoring-evaluation/?lang=cy (CYM).
Site selection was restricted to selected sample sites within six Watsonian vice-counties: Anglesey, Caernarvonshire, Denbighshire, Brecknockshire, Radnorshire and Glamorgan.
The objective of the winter field-scale surveys was to determine whether abundance of yellowhammers on agri-environment scheme (AES) prescriptions expected to provide winter food was greater than on fields under alternative management.
Data recorded by specialists under contract to Welsh Government. Records present in this data have been checked against digital data supplied before submission to the NBN Gateway. Note that there is bias inherent to the data collection method where multiple sample sites within a km grid-square may have been surveyed. The effects of this situation have been mitigated, in part, by aggregating data to display only 1 instance of a species per km grid-square. Absence of species is not shown within the data. The data has also been checked using the NBN record cleaner.
Data reflects the quality of the records supplied by third parties in the fulfilment of "Tir Cynnal and Tir Gofal Monitoring and Evaluation Programme: Field-scale winter surveys of yellowhammers".
Complete area searches were done by slowly walking the perimeters of fields, with an appropriate number of transect routes transects across large fields. This method effectively achieves complete counts of birds (Bradbury et al. 2004).
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Looking up... the number of records that can be accessed through the NBN Atlas. This resource was last checked for updated data on 09 May 2018. The most recent data was published on 09 May 2018.Click to view records for the Tir Cynnal and Tir Gofal Monitoring and Evaluation Programme: Field-scale winter surveys of yellowhammers resource.
Metadata last updated on 2018-05-09 06:33:35.0