ee4b440e-2604-40b9-bca7-19d6392bd9ea English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2026-01-09T10:10:48 UK GEMINI 2.3 OSGB 1936 / British National Grid United Kingdom Butterfly Monitoring Scheme: species trends 2018 2019-11-01 publication https://catalogue.ceh.ac.uk/id/ee4b440e-2604-40b9-bca7-19d6392bd9ea 10.5285/ee4b440e-2604-40b9-bca7-19d6392bd9ea doi: Botham, M.S., Brereton, T., Harris, S., Harrower, C., Middlebrook, I., Randle, Z., Roy, D.B. (2019). United Kingdom Butterfly Monitoring Scheme: species trends 2018. NERC Environmental Information Data Centre 10.5285/ee4b440e-2604-40b9-bca7-19d6392bd9ea This dataset provides linear trends, over varying time periods, for the UK Butterfly Monitoring Scheme (UKBMS) 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 2018), for the last 20 years, and for the last decade. In addition a trend class, based on slope direction and its significance, and a percentage change for that time period are provided to describe the statistical trends. These trend data are provided for 59 UK butterfly species. Trends across different time series allow us to determine the long and short-term trends for 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 Centre for Ecology & Hydrology (CEH), 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. Full details about this dataset can be found at https://doi.org/10.5285/ee4b440e-2604-40b9-bca7-19d6392bd9ea Botham, M.S. Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0002-5276-1405 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Brereton, T. Butterfly Conservation tbrereton@butterfly-conservation.org author Harris, S. British Trust for Ornithology sarah.harris@bto.org author Harrower, C. Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0001-5070-5293 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Middlebrook, I. Butterfly Conservation imiddlebrook@butterfly-conservation.org https://orcid.org/0000-0002-0448-9144 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Randle, Z. Butterfly Conservation zrandle@butterfly-conservation.org author Roy, D.B. Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0002-5147-0331 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Botham, M. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk pointOfContact NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian NERC Environmental Information Data Centre info@eidc.ac.uk publisher Brereton, T. Butterfly Conservation tbrereton@butterfly-conservation.org pointOfContact Species Distribution theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication lepidopteran butterfly GEMET - Concepts, version 4.1.3 2019-01-28 creation England Scotland Wales Northern Ireland United Kingdom GeoNames 2006-01-01 creation Biodiversity UK-SCAPE otherRestrictions no limitations otherRestrictions This resource is available under the terms of the Open Government Licence otherRestrictions © UK Centre for Ecology & Hydrology otherRestrictions © Butterfly Conservation otherRestrictions © British Trust for Ornithology otherRestrictions © Natural Environment Research Council otherRestrictions © Joint Nature Conservation Committee otherRestrictions Attribution statement: Contains UK Butterfly Monitoring Scheme (UKBMS) data © copyright and database right Butterfly Conservation, the Centre for Ecology & Hydrology, British Trust for Ornithology, and the Joint Nature Conservation Committee. otherRestrictions If you reuse this data, you should cite: Botham, M.S., Brereton, T., Harris, S., Harrower, C., Middlebrook, I., Randle, Z., Roy, D.B. (2019). United Kingdom Butterfly Monitoring Scheme: species trends 2018. NERC Environmental Information Data Centre https://doi.org/10.5285/ee4b440e-2604-40b9-bca7-19d6392bd9ea textTable 10 English utf8 biota 2018-04-01 2018-09-30 -8.648 1.768 49.864 60.861 Comma-separated values (CSV) NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://data-package.ceh.ac.uk/data/ee4b440e-2604-40b9-bca7-19d6392bd9ea Download the data Download a copy of this data download https://data-package.ceh.ac.uk/sd/ee4b440e-2604-40b9-bca7-19d6392bd9ea.zip Supporting information Supporting information available to assist in re-use of this dataset information dataset dataset 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 2010-12-08 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.