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Conophytum phoenicium

Taxonomy
Scientific Name
Conophytum phoenicium S.A.Hammer
Higher Classification
Dicotyledons
Family
AIZOACEAE
National Status
Status and Criteria
Critically Endangered A2ac
Assessment Date
2016/09/07
Assessor(s)
A.J. Young & L. von Staden
Justification
Field observations indicate a significant population reduction within three generations. Although the population data is very uncertain, it is suspected that it has declined by around 80%. Recent attempts to locate this species in the wild have failed. The reasons for the population reduction are not understood, but may be related to habitat degradation. It is not known whether threats have ceased, and the current population trend is not known. The last field observations were of extremely small, isolated groups of plants occurring within a few square meters or less. It is therefore possible that it may be overlooked, and it is not suspected to be extinct, but further field surveys, particularly in years of good rainfall are needed.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape
Range
Richtersveld near Umdaus, north of Steinkopf.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Umdaus Mountains Succulent Shrubland
Description
Quartz flats.
Threats
Part of the population was lost to road construction in the 1990s (Hammer 2002), and there has been further sporadic impacts from mining exploration on the habitat. This however does not explain the extensive population decline observed over the past 20-25 years. There may have been degradation and trampling of quartz flats by livestock - the area is part of communally owned rangelands.
Population

This species is known from a single subpopulation that was estimated to consist of several thousand plants in the 1990s (Hammer 2002). It has however not been observed in its habitat for several years, despite many field visits to the immediate area. The population appears to have declined significantly, but the reasons are not known. The last two observations of this species in the wild were of extremely small, localized clumps of fewer than 50 individuals. It is possible that a few other, overlooked small clumps of plants exist. It is therefore difficult to determine the size of the remaining wild population, which is possibly very small, perhaps less than 500 mature individuals. Due to the uncertainty around population size estimates, it is difficult to infer the extent of the population reduction. It is suspected to be at least 50%, but is probably as much as 80-90%. C. phoenicium is a relatively short-lived species (generation length of only a few years), but the decline occurred over a very short time frame, within three generations. The current population trend is unknown.


Population trend
Unknown
Citation
Young, A.J. & von Staden, L. 2016. Conophytum phoenicium S.A.Hammer. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2019/12/11

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