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Thamnobryum angustifolium

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE BRYOPHYTA BRYOPSIDA HYPNALES NECKERACEAE

Scientific Name: Thamnobryum angustifolium
Species Authority: (Holt) Crundw.

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1+2c ver 2.3
Year Published: 2000
Date Assessed: 2000-01-01
Annotations:
Needs updating
Assessor/s: Bryophyte Specialist Group
Reviewer/s: Hallingbäck, T., Hodgetts, N., Geissler, P. & Tan, B. (Bryophyte Red List Authority)
Justification:
The known area of occupancy is less than 10 km² and the species is subject to a number of threats and potential threats. The number of old herbarium specimens clearly shows that it has declined. It therefore meets the IUCN criteria for Critically Endangered based on the small area, the only locality and the decline.

Geographic Range [top]

Range Description: Only one locality in Derbyshire, England.
Countries:
Native:
United Kingdom (Great Britain)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Shaded cliff beside a calcareous spring or on limestone in a stream.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): This species is sensitive to disturbance from a possible new footpath, rock-climbers and cavers, collection by bryologists. Any pollution of the spring in which it grows may also threaten it. Possibly the greatest threat is desiccation caused by extensive periods of drought when the spring does not flow.

Conservation Actions [top]

Conservation Actions: The only locality is in a nature reserve.
Citation: Bryophyte Specialist Group 2000. Thamnobryum angustifolium. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 17 April 2014.
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