Bromus interruptus

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
PLANTAE	TRACHEOPHYTA	LILIOPSIDA	CYPERALES	GRAMINEAE

Scientific Name:	Bromus interruptus
Species Authority:	(Hack.) Druce
Taxonomic Notes:	Bromus interruptus (interrupted brome) almost certainly arose in the 19th century as a new species through a major and sudden genetic change (UK Biodiversity Group 1998).

Assessment Information [top]

Red List Category & Criteria:

Extinct in the Wild ver 3.1

Year Published:

2011

Assessor/s:

Bilz, M.

Reviewer/s:

Rich, T.C.G. & Walker, K.

Contributor/s:

Justification:
Bromus interruptus was last seen in the wild in Cambridgeshire in 1972. Since 2001, three populations have been reintroduced to Cambridge, Aston Rowant and Cholderton. These populations are not yet considered to be self-sustaining.

History:

1998

–

Extinct

Geographic Range [top]

Range Description:	This species is endemic to the UK. Historically it was found scattered mostly south of a line from the Wash to the Severn estuary (Biodiversity Action Reporting System 2010). It is extinct in the wild since 1972. It was introduced to the Netherlands but never persisted there (Rich and Lockton 2002).
Countries:	Regionally extinct: United Kingdom (Great Britain)
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	Three introductions have taken place since 2001 (Biodiversity Action Reporting System 2010). Several hundred plants were observed germinating and fruiting in summer 2005 at the Aston Rowant National Nature Reserve in the Chiltern Hills (Marren 2005) and is believed to be regenerating at this site (K. Walker pers. comm. 2010).

Population:

Three introductions have taken place since 2001 (Biodiversity Action Reporting System 2010). Several hundred plants were observed germinating and fruiting in summer 2005 at the Aston Rowant National Nature Reserve in the Chiltern Hills (Marren 2005) and is believed to be regenerating at this site (K. Walker pers. comm. 2010).

Habitat and Ecology [top]

Habitat and Ecology:	This annual species was an arable weed, especially of sainfoin, clover or rye-grass (Morgan and Leon 1992, Rich and Lockton 2002).
Systems:	Terrestrial

Threats [top]

Major Threat(s):	The causes for its extinction were probably crop sprays and improved seed screening (Rich and Lockton 2002).

Major Threat(s):

The causes for its extinction were probably crop sprays and improved seed screening (Rich and Lockton 2002).

Conservation Actions [top]

Conservation Actions:	This species is listed under Appendix I of the Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention). Reintroductions have taken place. The plant is grown in several botanic gardens in the UK (e.g. Cambridge Botanic Garden, Royal Botanic Gardens Kew) and in private gardens (K. Walker pers. comm. 2010).

Conservation Actions:

This species is listed under Appendix I of the Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention).
Reintroductions have taken place. The plant is grown in several botanic gardens in the UK (e.g. Cambridge Botanic Garden, Royal Botanic Gardens Kew) and in private gardens (K. Walker pers. comm. 2010).

Citation:	Bilz, M. 2011. Bromus interruptus. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 22 May 2013.
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