BGS Hosted Metadata
United Kingdom Butterfly Monitoring Scheme: species trends 2023
This dataset provides linear trends, over varying time periods, for the Collated Indices of individual butterfly species across the UK. The main statistical values derived from a linear regression (slope, standard error, P-value) are presented for the entire time series for each species (1976# to 2023), for the last 20 years, and for the last decade. In addition, trends are classified based on the direction and significance of a linear slope together with an estimated percentage change for that time period. These trend data are provided for all UK butterfly species for which we have sufficient data (58 species). Trends are calculated by performing a linear regression on the annual Collated indices for each species. Collated indices are calculated using a log-linear model incorporating individual site indices from all monitored sites across the UK for a given species in a given year. Trends across different time series allow us to determine the long and short-term status of individual species. This is enables us to focus conservation and research and also to assess species responses to conservation already in place. The UK Butterfly Monitoring Scheme is organized and funded by Butterfly Conservation (BC), the UK Centre for Ecology & Hydrology (UKCEH), the British Trust for Ornithology (BTO), and the Joint Nature Conservation Committee (JNCC). The UKBMS is indebted to all volunteers who contribute data to the scheme. This work was supported by the Natural Environment Research Council award number NE/R016429/1 as part of the UK-SCAPE programme delivering National Capability. #Because the Collated indices are only calculated for each species in years in which it was recorded on five or more sites, the starting year for the series is later than 1976 for a number of rarer species. Full details about this dataset can be found at https://doi.org/10.5285/ae7542e2-bf37-4391-b47e-96ed3f6fe096
Simple
- Date (Publication)
- 2025-02-11
- Citation identifier
- https://catalogue.ceh.ac.uk/id/ae7542e2-bf37-4391-b47e-96ed3f6fe096
- Citation identifier
- doi: / 10.5285/ae7542e2-bf37-4391-b47e-96ed3f6fe096
- Other citation details
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Botham, M.S., Middlebrook, I., Heywood, J., Harrower, C., Conway, R., Roy, D.B. (2025). United Kingdom Butterfly Monitoring Scheme: species trends 2023. NERC EDS Environmental Information Data Centre 10.5285/ae7542e2-bf37-4391-b47e-96ed3f6fe096
- Point of contact
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Organisation name Individual name Electronic mail address Role UK Centre for Ecology & Hydrology Botham, M.S. Author Butterfly Conservation
Middlebrook, I. Author British Trust for Ornithology
Heywood, J.
Author UK Centre for Ecology & Hydrology Harrower, C. Author Butterfly Conservation
Conway, R.
Author UK Centre for Ecology & Hydrology Roy, D.B. Author UK Centre for Ecology & Hydrology Botham, M.
Point of contact NERC EDS Environmental Information Data Centre Custodian NERC EDS Environmental Information Data Centre Publisher UK Centre for Ecology & Hydrology Owner Butterfly Conservation
EMAIL NOT PROVIDED
Owner British Trust for Ornithology
EMAIL NOT PROVIDED
Owner Natural Environment Research Council
EMAIL NOT PROVIDED
Owner Joint Nature Conservation Committee
EMAIL NOT PROVIDED
Owner
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GEMET - INSPIRE themes, version 1.0
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Environmental Monitoring Facilities
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- no limitations
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Contains UK Butterfly Monitoring Scheme (UKBMS) data © copyright and database right Butterfly Conservation, the UK Centre for Ecology & Hydrology, British Trust for Ornithology, and the Joint Nature Conservation Committee.
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If you reuse this data, you should cite: Botham, M.S., Middlebrook, I., Heywood, J., Harrower, C., Conway, R., Roy, D.B. (2025). United Kingdom Butterfly Monitoring Scheme: species trends 2023. NERC EDS Environmental Information Data Centre https://doi.org/10.5285/ae7542e2-bf37-4391-b47e-96ed3f6fe096
- Spatial representation type
- Text, table
- Language
- English
- Character set
- UTF8
- Topic category
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- Environment
- Begin date
- 2023-01-01
- End date
- 2023-12-31
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- Unique resource identifier
- OSGB 1936 / British National Grid
- Distribution format
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Name Version Comma-separated values (CSV)
- Distributor contact
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Organisation name Individual name Electronic mail address Role NERC EDS Environmental Information Data Centre
Distributor
- OnLine resource
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Protocol Linkage Name https://data-package.ceh.ac.uk/data/ae7542e2-bf37-4391-b47e-96ed3f6fe096 Download the data
- OnLine resource
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Protocol Linkage Name https://data-package.ceh.ac.uk/sd/ae7542e2-bf37-4391-b47e-96ed3f6fe096.zip Supporting information
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- Dataset
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dataset
Conformance result
- Title
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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
- Date (Publication)
- 2010-12-08
- Statement
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Trends are calculated by performing a linear regression on the annual Collated Indices for each species. Indices are calculated for all species (across Wider Countryside Butterfly Survey squares and traditional UKBMS sites) using the Generalised Abundance Index (GAI) method developed in 2016 with an additional modification that the data from each site in each year is weighted in the final stage relative to the proportion of the species flight period surveyed that year for that site. They give a statistical measure of how the abundance of each species has changed on monitored sites since 1976, over the last 20 years, and over the last decade. Because the Collated indices are only calculated for each species in years in which there was sufficient data available, the starting year for the series is later than 1976 for a number of rarer species
Metadata
- File identifier
- ae7542e2-bf37-4391-b47e-96ed3f6fe096 XML
- Metadata language
- English
- Character set
- 8859 Part 1
- Hierarchy level
- Dataset
- Hierarchy level name
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dataset
- Date stamp
- 2025-03-21T13:34:56
- Metadata standard name
- UK GEMINI
- Metadata standard version
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2.3
- Metadata author
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Organisation name Individual name Electronic mail address Role NERC EDS Environmental Information Data Centre Point of contact
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