Map_thumbnail_large_font

Agrostis trachychlaena

Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA LILIOPSIDA CYPERALES GRAMINEAE

Scientific Name: Agrostis trachychlaena
Species Authority: C.E.Hubbard

Assessment Information [top]

Red List Category & Criteria: Endangered D ver 3.1
Year Published: 2003
Date Assessed: 2003-04-30
Annotations:
Needs updating
Assessor(s): Jakubowsky, G. (University of Vienna, Institute of Botany)
Reviewer(s): Cronk, Q. & Cairns-Wicks, R. (South Atlantic Island Plants Red List Authority)
Justification:
The maximum extent of occurrence is 16 km² (Inaccessible 12 km², Nightingale 4 km²). The area of occupancy is likely to be less than 10 km². The species was found only once (1938) on Inaccessible in the northeastern part of the island (above Waterfall Beach). In a one weeks stay in 2000 in the northwestern part (Blenden Hall) it wasn’t recorded; it was also not recorded by Roux et al. (1992). On Nightingale in eight days in 2001 only two individuals were found. Due to the dense coverage of Nightingale Island with Spartina arundinaccea it is not easy to estimate the population size, but the best estimate given the data at hand is that there are relatively few individuals scattered over the island. It is likely that there are more than 50 mature individuals, but less than 250, G. Jakubowsky (pers. comm.).

Geographic Range [top]

Range Description: Endemic to Tristan da Cunha (Inaccessible Island, Nightingale Island).
Countries:
Native:
Saint Helena, Ascension and Tristan da Cunha (Tristan da Cunha)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: On rocky slopes, open patches in Spartina arundinacea tussock, around albatross nesting sites.
Systems: Terrestrial

Threats [top]

Major Threat(s): The main threat lies in the low number of individuals and the small area of occupancy. It is unlikely that the current situation was caused by human activities, the species was possibly always scarce or a decline was caused by erosion of the volcanic islands and subsequent loss of suitable habitats. A potential threat is the introduction of alien species and fire caused by visitors. Spartina arundinacea which covers most of Nightingale Island is easily lit and can burn for a long period.

Conservation Actions [top]

Conservation Actions: Inaccessible Island is a Nature Reserve.

Citation: Jakubowsky, G. (University of Vienna, Institute of Botany) 2003. Agrostis trachychlaena. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 27 November 2014.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided