United Kingdom Butterfly Monitoring Scheme: species trends 2017

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 2017), 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.

本数据集提供了英国蝴蝶监测计划（UK Butterfly Monitoring Scheme, UKBMS）汇总的全英范围内各蝴蝶物种的种群指数在不同时段的线性趋势。本数据集针对每个物种，给出了基于1976年至2017年完整时间序列、近20年以及近10年的线性回归计算所得的核心统计量（斜率、标准误、P值）。此外，还提供了基于斜率方向与显著性水平定义的趋势类别，以及对应时段的种群变化百分比，以描述该统计趋势。本数据集涵盖了59种英国蝴蝶的此类趋势数据。通过不同时间序列的趋势分析，可明确各物种的长期与短期种群变化趋势，这可为物种保护与相关研究提供针对性方向，同时可评估物种对现有保护措施的响应效果。

英国蝴蝶监测计划由蝴蝶保护协会（Butterfly Conservation, BC）、生态与水文中心（Centre for Ecology & Hydrology, CEH）、英国鸟类学信托基金会（British Trust for Ornithology, BTO）以及联合自然保护委员会（Joint Nature Conservation Committee, JNCC）组织运营并提供资助。英国蝴蝶监测计划对所有为本计划贡献观测数据的志愿者致以诚挚谢意。