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Professional surveyors conducted transect surveys (counting pollinating insects) and timed observations (recording insect-flower interactions). Butterflies were recorded to species-level, and bees and hoverflies were recorded to functional group-level. Density of flowering plants on each transect section was recorded on a DAFOR-X scale. In total, 146 1 x 1 km grid squares in Wales were surveyed, with each visited twice in one year in either 2021 or 2023.\nERAMMP NFS is a resurvey of all of the 300 locations from the initial Glastir Monitoring and Evaluation Programme (GMEP) monitoring program (300 1km squares) on a rolling annual basis, with the aim to resurvey all sites between 2021 and 2025. The initial monitoring program, GMEP, was set up by the Welsh Government in 2013 to report national trends and monitor the effects of the Glastir agri-environment scheme on the environment and ran from 2013 to 2016.\nThe field survey element was based on a stratified random sampling design of 300 x 1km square sites across Wales, and was managed by the UK Centre for Ecology & Hydrology.","distributionFormats":[{"name":"Comma-separated values (CSV)","type":"text/csv","version":"unknown"}],"distributorContacts":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"distributor","email":"info@eidc.ac.uk"}],"funding":[{"funderName":"Welsh Government","funderIdentifier":"https://ror.org/000wh6t45","orcid":false,"ror":true}],"hasOnlineServiceAgreement":true,"id":"1b90ebdc-3aa3-4832-8a3f-067494d8d218","incomingCitationCount":0,"infoLinks":[{"url":"https://data-package.ceh.ac.uk/sd/1b90ebdc-3aa3-4832-8a3f-067494d8d218.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"keywordsOther":[{"value":"pollinators"},{"value":"agri-environment scheme"},{"value":"Environment and Rural Affairs Monitoring & Modelling Programme"},{"value":"ERAMMP"},{"value":"Wales"}],"keywordsTheme":[{"value":"Biodiversity","uri":"http://onto.nerc.ac.uk/CEHMD/topic/2"},{"value":"Environmental survey","uri":"http://onto.nerc.ac.uk/CEHMD/topic/7"}],"licences":[{"value":"This resource is available under the terms of the Open Government Licence","code":"license","uri":"https://eidc.ac.uk/licences/OGL/plain"}],"lineage":"The data were recorded by trained professional surveyors using bespoke recording forms (provided in supporting information). There were two main components to each survey visit: (1) a 2km transect walk and (2) a timed observation of pollinator-flower interactions within a fixed area. Data were recorded from 146 x 1km squares sited across Wales, selected by random stratified sampling. Surveyors entered data to a secure online portal. Data were subsequently transposed, stored in a secure geodatabase, and exported as comma-separated value fields for deposit into the EIDC. The survey was managed by the UK Centre for Ecology & Hydrology. Standardised methodologies were applied throughout.","metadataDate":"2026-05-11T17:45:11","notGEMINI":true,"onlineResources":[{"url":"https://data-package.ceh.ac.uk/data/1b90ebdc-3aa3-4832-8a3f-067494d8d218","name":"Download the data","description":"Download a copy of this data","function":"download","type":"OTHER"},{"url":"https://data-package.ceh.ac.uk/sd/1b90ebdc-3aa3-4832-8a3f-067494d8d218.zip","name":"Supporting information","description":"Supporting information available to assist in re-use of this dataset","function":"information","type":"OTHER"}],"pointsOfContact":[{"displayName":"Callum Macgregor","organisationName":"British Trust for Ornithology","organisationIdentifier":"https://ror.org/03w54w620","role":"pointOfContact","email":"wales.info@bto.org","nameIdentifier":"https://orcid.org/0000-0001-8281-8284","address":{"deliveryPoint":"BTO Cymru, Thoday Building, Bangor University, Deiniol Road","city":"Bangor","administrativeArea":"Gwynedd","postalCode":"LL57 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