Schlechteranthus holgatensis

Taxonomy
Scientific Name
Schlechteranthus holgatensis Klak
Higher Classification
Dicotyledons
Family
AIZOACEAE
National Status
Status and Criteria
Vulnerable D1+2
Assessment Date
2016/10/25
Assessor(s)
C. Klak, P.V. Bruyns & L. von Staden
Justification
This species is known from a single subpopulation of 500-1000 mature individuals, and is potentially threatened by habitat degradation due to overgrazing.
Distribution
Endemism
South African endemic
Provincial distribution
Northern Cape
Range
Richtersveld, Holgat River near Lekkersing.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Lekkersing Succulent Shrubland
Description
Schist with a cover of quartz gravel, 270-340 m.
Threats
Field observations indicate no severe threats to this species (Klak and Bruyns 2016). Large areas of the Richtersveld is severely overgrazed, and in places, overgrazing and trampling has led to a loss of species diversity and shrub cover. Habitat degradation due to overgrazing is a potential threat to this species.
Population

S. holgatensis is known from a single locality. The population covers a total area (area of occupancy, AOO) of less than 5 ha. The total number of plants is estimated at between 500 and 1000 (Klak and Bruyns 2016). There are currently no severe threats to the population, and it is therefore inferred to be stable. The species occurs in a remote area that is botanically still relatively poorly explored, and it is possible that other, still undiscovered subpopulations exist.


Population trend
Stable
Bibliography

Klak, C. and Bruyns, P. 2016. Expansion of Schlechteranthus (Ruschioideae, Aizoaceae) to include Polymita, with a new species from Namaqualand, South Africa. South African Journal of Botany 103:70-77.


Citation
Klak, C., Bruyns, P.V. & von Staden, L. 2016. Schlechteranthus holgatensis Klak. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2017/12/14

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Distribution map


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