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Northern Cape Province, Kamieskroon, Brakwater Farm (between
Arakoep and Verbe farms)
Zonobiome III: Hot Deserts
Subzonobiome: Subtropical Maritime Hot Semi-Deserts
Regional Zonal Biome: Succulent Karoo
Subbiome: Namaqualand Hardeveld
Community: Ruschia robusta-Eriocephalus ericoides Succulent Scrub.
Low scrub (on average up to 60-70 cm tall), with ground layer composed
of low-grown vygies (= succulent Aizoaceae) and scattered small-size
annuals (e.g., Cotula, Felicia, Heliophila). The canopy is semi-open (with
extensive vegetation-free gaps. The soils are coarse, sandy with admixture
of fine reddish-light brown loam; not very deep, covering underlying
granodiorites. Some rocky outcrops are visible. The site is located on a
gentle-sloping (3-5 deg slope, aspect: 160 deg; hence almost due south;
southern slopes are the dry slopes on southern hemisphere!).
The scrub has been exposed obviously in distant past to light sheep
grazing, but no recent traces of it visible today.
The scrub is two-layered: low shrub layer and discontinuous herb-layer
composed of herbaceous annuals and bulb geophytes (belonging to six
genera) and several grasses.
Total cover: 60%; E2apha: 60%; E1:10%
Slope: 3-5 deg; aspect: 160 deg; sampled area: 30 x 30 m
(#Asteraceae; & succulents; @ bulbs)
E2alpha:
#Eriocephalus ericoides 40%
&Ruschia robusta 25%
#Pteronia incana 5%
Lacomucinea lineata 2%
Wiborgia monoptera 2%
Aptosimum spinosum 1%
&Crassula (climbing) 1%
Calobota sericea 1%
&Euphorbia burmanni 1%
&Galenia africana 1%
Hermannia dissermifolia 1%
#Hirpicium alienum 1%
#Pteronia (white) sp. 1%
Viscum rotundifolium 1%
E1:
#Cotula barbata 2%
Heliophila variabilis 2%
&Aizoon canariense 1%
@Albuca spiralis 1%
@Albuca sp. 1%
@Babiana sp. 1%
&Conicosia elongata 1%
@Cyphia volubilis 1%
@Ferraria macrochlamys subsp. macrochlamys 1%
#Gorteria diffusa ‘Springbok type’ 1%
#Ifloga polycnemoides 1%
#Felicia australis 1%
Lepidium sp. 1%
#Leysera gnaphalodes 1%
#Leysera tenella 1%
@Moraea schlechteri 1%
Nemesia versicolor 1%
@Oxalis obtusa 1%
#Rhynchopsidium pumilum 2%
Wahlenbergia annulata 1%
Grasses:
Ehrharta calycina 3%
Chaetobromus involucratus subsp. dregeanus 2%
Stipagrostis namaquensis 2%.
No visible traces of recent anthropogenic disturbances.The samples (9 x 3) were not stored with silicagel since all samples very
bone dry due to prolonged rain-free period preceding the sampling. |