NERC Data Catalogue Service
United Kingdom Butterfly Monitoring Scheme: species trends 2020
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 the present year), 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.
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 the present year), 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/10.5285/236ee6bd-2330-4f84-a871-5a8ebe1925b5
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Identification info
- Metadata Language
- English (en)
- Character set
- utf8
- Dataset Reference Date ()
- 2022-02-04
- Identifier
- doi: / 10.5285/236ee6bd-2330-4f84-a871-5a8ebe1925b5
- Other citation details
- Botham, M.S., Middlebrook, I., Harris, S., Harrower, C., Lowe, M., Roy, D.B. (2022). United Kingdom Butterfly Monitoring Scheme: species trends 2020. NERC EDS Environmental Information Data Centre 10.5285/236ee6bd-2330-4f84-a871-5a8ebe1925b5
- GEMET - INSPIRE themes, version 1.0 ()
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- Environmental Monitoring Facilities
- Keywords
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- annual
- Biodiversity
- butterflies
- England
- Lepidoptera
- Northern Ireland
- Scotland
- UK-SCAPE
- United Kingdom
- Wales
- Limitations on Public Access
- otherRestrictions
- Other constraints
- no limitations
- Use constraints
- otherRestrictions
- Use constraints
- otherRestrictions
- Other constraints
- © UK Centre for Ecology & Hydrology
- Use constraints
- otherRestrictions
- Other constraints
- © Butterfly Conservation
- Use constraints
- otherRestrictions
- Other constraints
- © British Trust for Ornithology
- Use constraints
- otherRestrictions
- Other constraints
- © Natural Environment Research Council
- Use constraints
- otherRestrictions
- Other constraints
- © Joint Nature Conservation Committee
- Use constraints
- otherRestrictions
- Other constraints
- The following attribution statement must be included on the catalogue record: 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.
- Use constraints
- otherRestrictions
- Other constraints
- If you reuse this data, you should cite: Botham, M.S., Middlebrook, I., Harris, S., Harrower, C., Lowe, M., Roy, D.B. (2022). United Kingdom Butterfly Monitoring Scheme: species trends 2020. NERC EDS Environmental Information Data Centre https://doi.org/10.5285/236ee6bd-2330-4f84-a871-5a8ebe1925b5
- Spatial representation type
- textTable
- Distance
- 10 urn:ogc:def:uom:EPSG::9001
- Topic category
-
- Biota
))
- Begin date
- 2020-04-01
- End date
- 2020-09-30
Distribution Information
- Data format
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Comma-separated values (CSV)
()
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Comma-separated values (CSV)
()
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- Quality Scope
- dataset
- Other
- dataset
Report
- Dataset Reference Date ()
- 2010-12-08
- Statement
- Trends are calculated by performing a linear regression on the annual Collated Indices for each species. Indices are calculated for all species (across WCBS 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
- 236ee6bd-2330-4f84-a871-5a8ebe1925b5 XML
- Metadata Language
- English (en)
- Character set
- ISO/IEC 8859-1 (also known as Latin 1)
- Resource type
- dataset
- Hierarchy level name
- dataset
- Metadata Date
- 2022-04-12T12:52:17
- Metadata standard name
- UK GEMINI
- Metadata standard version
- 2.3
