Tir Cynnal and Tir Gofal Monitoring and Evaluation Programme: Brown Hairstreak survey
Welsh Government
Description
Dataset records observations of species collected whilst undertaking field survey for Tir Cynnal and Tir Gofal Monitoring and Evaluation Programme: Brown Hairstreak survey. 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).
Geographic Description
Site selection was restricted to selected sample sites within six Watsonian vice-counties: Anglesey, Caernarvonshire, Denbighshire, Brecknockshire, Radnorshire and Glamorgan.
Purpose
The objective was to determine if hedge- and field-scale populations of brown hairstreak in agri-environment scheme farms differed from those in paired non-AES farms.
Data quality
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. Data has also been checked by 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: Brown Hairstreak survey".
Methods
Brown hairstreak surveys focused on hedgerows and other woody field boundaries (woodland edges, scrub edges and tree lines, hereafter collectively called hedges). In-field scrub was not included in surveys as this was only present on a small proportion of farms, and is likely to be subject to different management to field boundaries.
Citation
Welsh Government ([Insert download year]). Tir Cynnal and Tir Gofal Monitoring and Evaluation Programme: Brown Hairstreak survey. Occurrence dataset on the NBN Atlas
Rights
OGL
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Digitised records
Looking up... the number of records that can be accessed through the NBN Atlas. This resource was last checked for updated data on 13 Dec 2022. The most recent data was published on 13 Dec 2022.
Click to view records for the Tir Cynnal and Tir Gofal Monitoring and Evaluation Programme: Brown Hairstreak survey resource.