Welsh Lichen Red List - Lichens of Wales

Contents
Rhestr o Gen Data Coch ar gyfer Cymru
1 Introduction 6
2 Implementation of this Red Data List 7
3 Coverage 8
3.1 Taxonomic coverage 8
3.2 Geographic coverage 8
4 Data sources 9
5 Application of IUCN criteria 10
5.1 IUCN categories at the regional level 10
5.2 Treating Wales as a region 10
5.3 IUCN categories in Wales 11
6 Explanation of the Wales Red Data List 14
6.1 Species listed 14
6.2 Wales Red List threat status and criteria 14
6.3 British Red List threat status 14
6.4 Rarity 14
6.5 National/international responsibility 15
6.6 Edge of British range in Wales 15
6.7 Porportion of British population 15
6.8 Biodiversity Action Plan and Section 42 species 15
6.9 Schedule 8 species 15
7 Analysis 16
7.1 Comparison of Welsh and British Red Data Lists 16
7.2 Taxa extinct in Wales 16
7.3 Taxa “doing better” in Wales 18
7.4 Taxa “doing worse” in Wales 19
7.5 Taxa reaching the edge of their range in Wales 24
7.6 Species for which Wales has a particular responsibility 28
8 Lichen Red Data List for Wales 35
9 Acknowledgements 62
10 References 63
Appendix 1 64
5