ABSTRACT

Introduction

Britain supports one of the richest bryophyte floras in Europe. Following previous assessments in 2001 and 2011, the aim of this study was to provide a new IUCN Red List of the bryophytes of Britain.

Methods

Following IUCN guidance, all species known to have occurred in Britain since ad 1500 (n = 1097) were assessed based on a comprehensive review and synthesis of available information. Various new measures are provided here for all species, such as the number of subpopulations, area of occupancy, and extent of occurrence, in addition to national population estimates for 181 species. Results are compared with the previous Red List assessment of 2011.

Key results and conclusions

Species were categorised as Regionally Extinct (RE, n = 4), Not Applicable (NA, n = 23), Data Deficient (DD, n = 45), Critically Endangered (CR, n = 59), Endangered (EN, n = 52), Vulnerable (VU, n = 80), Near Threatened (n = 39) or Least Concern (n = 795). Excluding those in DD, NA or RE, 19% (n = 191) of bryophyte species in Britain are threatened with extinction (i.e. are in CR, EN or VU). Of the 59 species in the highest extinction risk category (CR), it is possible that 20 (34%) are already extinct. Of the 143 species included in the previous assessment in a threatened category (CR, EN or VU), 85 (69%) have been transferred to a new category, mainly because of new information on the status of the species.

中文翻译：

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2023 年英国苔藓植物的新 IUCN 红色名录

摘要

介绍

英国支持着欧洲最丰富的苔藓植物群之一。继 2001 年和 2011 年的先前评估之后，本研究的目的是提供一份新的英国 IUCN 苔藓植物红色名录。

方法

根据 IUCN 指南，所有已知的自公元1500 年以来出现在英国的物种( n  = 1097) 都根据可用信息的全面审查和综合进行了评估。除了 181 个物种的全国种群估计数之外，此处还为所有物种提供了各种新的衡量指标，例如亚种群数量、占据面积和发生范围。结果与 2011 年之前的红色名录评估进行了比较。

主要结果和结论

物种被归类为区域性灭绝（RE，n  = 4）、不适用（NA，n  = 23）、数据不足（DD，n  = 45）、极度濒危（CR，n  = 59）、濒危（EN，n  = 52)、易危（VU，n  = 80）、近危（n  = 39）或无危（n  = 795）。不包括 DD、NA 或 RE 中的那些，19% ( n = 191) 英国的苔藓植物物种面临灭绝威胁（即在 CR、EN 或 VU）。在最高灭绝风险类别 (CR) 的 59 个物种中，可能有 20 个 (34%) 已经灭绝。在先前评估中列入受威胁类别（CR、EN 或 VU）的 143 个物种中，85 个 (69%) 已转移到新类别，这主要是因为有关物种状况的新信息。