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United Kingdom Butterfly Monitoring Scheme: species trends 2021

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 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/10.5285/512a71c7-dd2e-4caf-b0db-702b711bd153

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Date (Publication)
2022-11-21
Identifier
https://catalogue.ceh.ac.uk/id/512a71c7-dd2e-4caf-b0db-702b711bd153
Identifier
doi: / 10.5285/512a71c7-dd2e-4caf-b0db-702b711bd153
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 2021. NERC EDS Environmental Information Data Centre 10.5285/512a71c7-dd2e-4caf-b0db-702b711bd153
Author
  UK Centre for Ecology & Hydrology - Botham, M.S.
https://orcid.org/0000-0002-5276-1405
Author
  Butterfly Conservation - Middlebrook, I.
https://orcid.org/0000-0002-0448-9144
Author
  British Trust for Ornithology - Harris, S.
Author
  UK Centre for Ecology & Hydrology - Harrower, C.
https://orcid.org/0000-0001-5070-5293
Author
  Butterfly Conservation - Lowe, M.
Author
  UK Centre for Ecology & Hydrology - Roy, D.B.
https://orcid.org/0000-0002-5147-0331
Custodian
  NERC EDS Environmental Information Data Centre
Publisher
  NERC EDS Environmental Information Data Centre
Point of contact
  UK Centre for Ecology & Hydrology - Botham, M.
https://orcid.org/0000-0002-5276-1405
Owner
  UK Centre for Ecology & Hydrology
Owner
  Butterfly Conservation
Owner
  British Trust for Ornithology
Owner
  Natural Environment Research Council
Owner
  Joint Nature Conservation Committee
GEMET - INSPIRE themes, version 1.0
  • Environmental Monitoring Facilities
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This resource is available under the terms of the Open Government Licence
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© UK Centre for Ecology & Hydrology
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© Butterfly Conservation
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otherRestrictions Other restrictions
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© British Trust for Ornithology
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otherRestrictions Other restrictions
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© Natural Environment Research Council
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otherRestrictions Other restrictions
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© Joint Nature Conservation Committee
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otherRestrictions Other restrictions
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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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otherRestrictions Other restrictions
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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 2021. NERC EDS Environmental Information Data Centre https://doi.org/10.5285/512a71c7-dd2e-4caf-b0db-702b711bd153
Spatial representation type
textTable Text, table
Metadata language
EnglishEnglish
Character set
utf8 UTF8
Topic category
  • Biota
Begin date
2021-04-01
End date
2021-09-30
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Unique resource identifier
OSGB 1936 / British National Grid
Unique resource identifier
OSNI 1952 / Irish National Grid
Distribution format
  • Comma-separated values (CSV) ()

Distributor
  NERC EDS Environmental Information Data Centre
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Conformance result

Date (Publication)
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 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.
File identifier
512a71c7-dd2e-4caf-b0db-702b711bd153 XML
Metadata language
EnglishEnglish
Character set
ISO/IEC 8859-1 (also known as Latin 1) 8859 Part 1
Hierarchy level
dataset Dataset
Hierarchy level name
dataset
Date stamp
2025-03-21T13:34:35
Metadata standard name
UK GEMINI
Metadata standard version
2.3
Point of contact
  NERC EDS Environmental Information Data Centre
Lancaster Environment Centre, Library Avenue, Bailrigg , Lancaster , LA1 4AP , UK
https://eidc.ac.uk/
 
 

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GEMET - INSPIRE themes, version 1.0
Environmental Monitoring Facilities

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