UK Biodiversity Indicator B6, Pressure from invasive species

This spreadsheet is the underlying data for the biodiversity indicator B6, Pressure from invasive species. The United Nations Convention on Biological Diversity (CBD) identifies invasive non-native species as a major threat to biodiversity. Many non-native species do not threaten biodiversity but invasive non-native species can spread disease (e.g. signal crayfish Pacifastacus leniusculus), modify ecosystems (e.g. rhododendron Rhododendron ponticum), drastically reduce populations of native species (e.g. American mink Mustela vison), or hybridise with native species (e.g. ruddy duck Oxyura jamaicensis). Under the CBD, the United Kingdom has an international obligation to address the impacts of invasive non-native species. In 2008, the UK Government published the Invasive Non-native Species Framework Strategy for Great Britain. The indicator (Figure B6i) shows the change in number of invasive non-native species established across more than 10 per cent of the land area of Great Britain, or more than 10 per cent of the extent of the coastline. There are 180 established invasive non-native species included within the indicator, comprising 39 freshwater species, 34 marine species and 107 terrestrial species. This is one of a suite of 24 UK biodiversity indicators published by JNCC on behalf of Defra; the latest publication date was 19 January 2016 - for indicator B6 the latest data are for 2015. The supporting technical document details the methodology used to create the indicator.本电子表格为生物多样性指标B6「外来入侵物种压力」的基础数据集。 《生物多样性公约》（United Nations Convention on Biological Diversity, CBD）将外来入侵物种认定为生物多样性面临的主要威胁。多数外来物种并不会对生物多样性构成威胁，但外来入侵物种可传播疾病（如信号刺螯虾Pacifastacus leniusculus）、改变生态系统结构（如杜鹃花Rhododendron ponticum）、大幅降低本土物种种群数量（如美洲水鼬Mustela vison），或与本土物种发生杂交（如棕硬尾鸭Oxyura jamaicensis）。 依据《生物多样性公约》，英国承担着应对外来入侵物种影响的国际义务。2008年，英国政府发布了《大不列颠外来入侵物种框架战略》。 本指标（图B6i）展示了在大不列颠岛超过10%陆地面积或10%以上海岸线范围内已定殖的外来入侵物种数量变化。本指标共纳入180种已定殖外来入侵物种，其中包含淡水物种39种、海洋物种34种、陆生物种107种。 本指标为联合自然保护委员会（Joint Nature Conservation Committee, JNCC）代表环境、食品与农村事务部（Department for Environment, Food and Rural Affairs, Defra）发布的24项英国生物多样性指标之一，最新版本发布于2016年1月19日；其中指标B6的最新数据截至2015年。配套技术文档详细说明了本指标的构建方法。