Amanzi, Uitenhage
- Authors: Skead, C J (Cuthbert John)
- Date: 1995-01-30
- Subjects: Uitenhage (South Africa) , Portulacaria afra -- South Africa -- Eastern Cape , Crassula perfoliata -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:13319 , http://hdl.handle.net/10962/d1016999
- Description: Crassula perfoliata on lone rocky outcrop. Others elsewhere at same site. The green plant is Portulacaria afra.
- Full Text: false
- Date Issued: 1995-01-30
On farm Clifton (Mr. H. Norton) in Great Fish River valley near Pyrth's Bridge
- Authors: Skead, C J (Cuthbert John)
- Date: 1905-05-17
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape , Thatched roofs -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12598 , http://hdl.handle.net/10962/d1014005
- Description: Close-up of the thatching of a Native laborer's hut. The stems and branches of the Spekboom have been flattened by pulping and then stacked one on top of the other.
- Full Text: false
- Date Issued: 1905-05-17
Bushy slopes of Alicedale Poort on the Bushman's River beyond the railway line
- Authors: Skead, C J (Cuthbert John)
- Date: 1994-12-17
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12315 , http://hdl.handle.net/10962/d1016712
- Description: Heavy stand of Spekboom throughout. Both slopes of the poort were equally as heavily in flower (Portulacaria afra).
- Full Text: false
- Date Issued: 1994-12-17
Woodlands siding Paterson and Coerney, Alexandria district
- Authors: Skead, C J (Cuthbert John)
- Date: 1994-12-17
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12291 , http://hdl.handle.net/10962/d1013682
- Description: Close-up of a single Spekboom tree Portulacaria afra, one of a whole countryside in full blossom.
- Full Text: false
- Date Issued: 1994-12-17
A few km up New Year's River valley from Alicedale, Eastern Cape
- Authors: Skead, C J (Cuthbert John)
- Date: 1994-12-17
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12313 , http://hdl.handle.net/10962/d1016710
- Description: Fine bush of Spekboom Portulacaria afra - others scattered in the bush nearby.
- Full Text: false
- Date Issued: 1994-12-17
Near Hunt's Drift on the Great Fish River, Albany
- Authors: Skead, C J (Cuthbert John)
- Date: 19uu
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12599 , http://hdl.handle.net/10962/d1014006
- Description: Spekboom in flower.
- Full Text: false
- Date Issued: 19uu
Below Laing Dam on the Buffalo River, King William's Town
- Authors: Skead, C J (Cuthbert John)
- Date: 1961-06-01
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12661 , http://hdl.handle.net/10962/d1014068
- Description: Curtain-like branches of spekboom hanging in front of a cavemouth.
- Full Text: false
- Date Issued: 1961-06-01
Between railway line and road near Coerney, Alexandria
- Authors: Skead, C J (Cuthbert John)
- Date: 1994-12-17
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12292 , http://hdl.handle.net/10962/d1013683
- Description: Dense hedge of Spekboom, Portulacaria afra. Addo Elephant Park in background.
- Full Text: false
- Date Issued: 1994-12-17
Below Laing Dam on the Buffalo River, King William's Town
- Authors: Skead, C J (Cuthbert John)
- Date: 1961-06-01
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12660 , http://hdl.handle.net/10962/d1014067
- Description: Curtain-like branches of spekboom hanging in front of a cavemouth.
- Full Text: false
- Date Issued: 1961-06-01
On farm Clifton (Mr. H. Norton) in Great Fish River valley near Pyrth's Bridge
- Authors: Skead, C J (Cuthbert John)
- Date: 1905-05-11
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12596 , http://hdl.handle.net/10962/d1014003
- Description: Trimmed hedge of Spekboom, Portulacaria afra.
- Full Text: false
- Date Issued: 1905-05-11
Lower De Stades River Valley in Maitland River Reserve, 28km west of Port Elizabeth central
- Authors: Skead, C J (Cuthbert John)
- Date: 19uu
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Acacia karroo -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12729 , http://hdl.handle.net/10962/d1014430
- Description: Acacia karroo, note others in river bed, centre of picture. One lone flowering bush of Spekboom, Portulacaria afra on opposite hillside.
- Full Text: false
- Date Issued: 19uu
Near Coerney, Alexandria, just north of the Addo Elephant National Park
- Authors: Skead, C J (Cuthbert John)
- Date: 1994-12-17
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12293 , http://hdl.handle.net/10962/d1013684
- Description: Dense Spekboom veld Portulacaria afra. The whole valley was in blossom after good winter rains.
- Full Text: false
- Date Issued: 1994-12-17
Road through Swartwaterspoort in the Swartwatersberg, 50km west of Grahamstown, Albany
- Authors: Skead, C J (Cuthbert John)
- Date: 1998-04-27
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12312 , http://hdl.handle.net/10962/d1016709
- Description: The stream of the Swartwaters River crosses the road in the foreground. Much of the vegetation in the horizontal belts across the krans-face is Spekboom, Portulacaria afra.
- Full Text: false
- Date Issued: 1998-04-27
East & north Coega kops, from East near Coega Railway
- Authors: Skead, C J (Cuthbert John)
- Date: 1997-08-21
- Subjects: Aloe striata -- South Africa -- Eastern Cape , Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12479 , http://hdl.handle.net/10962/d1013886
- Description: Typical scene amongst bush. Coral aloe, Aloe striata in good flower. A bush of spekboom, Portulacara afra in top right corner.
- Full Text: false
- Date Issued: 1997-08-21
Near Coerney, Alexandria, just north of the Addo Elephant National Park
- Authors: Skead, C J (Cuthbert John)
- Date: 1994-12-17
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12294 , http://hdl.handle.net/10962/d1013685
- Description: Dense stand of Spekboom, Portulacaria afra. Note density of stand in middle-distance towards the conical koppie. The preceding winter had been an especially good one.
- Full Text: false
- Date Issued: 1994-12-17
Noorsveld, 30 km south of Jansenville
- Authors: Skead, C J (Cuthbert John)
- Date: 1998-04-25
- Subjects: Plants -- South Africa -- Eastern Cape , Euphorbia ferox -- South Africa -- Eastern Cape , Portulacaria afra -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12656 , http://hdl.handle.net/10962/d1014063
- Description: Euphorbia ferox and Spekboom.
- Full Text: false
- Date Issued: 1998-04-25
Mr. Harold Norton's farm 'Clifton', in the Grahamstown district
- Authors: Skead, C J (Cuthbert John)
- Date: 1905-05-17
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape , Thatched roofs -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12597 , http://hdl.handle.net/10962/d1014004
- Description: The 'thatch' is made from the stems of Spekboom trees, Portulacaria afra. The dried stems are beaten with stones to flatten them, and are then packed on top of each other to form the thatch. There is no grassy thatching material in this dry Fish River area. No wonder the Spekboom is been destroyed so quickly.
- Full Text: false
- Date Issued: 1905-05-17
Middle of Coega River Flats, 25km north Port Elizabeth central
- Authors: Skead, C J (Cuthbert John)
- Date: 1994-12-12
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12442 , http://hdl.handle.net/10962/d1013849
- Description: Fine lone Spekboom plant, Portulacaria afra with others in bush.
- Full Text: false
- Date Issued: 1994-12-12
Alicedale Poort on the Bushman's River
- Authors: Skead, C J (Cuthbert John)
- Date: 1994-12-17
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Plants -- South Africa -- Eastern Cape
- Type: still image
- Identifier: vital:12314 , http://hdl.handle.net/10962/d1016711
- Description: Spekboom Portulacaria afra up the slope. The full bushy slope of both banks were in flower.
- Full Text: false
- Date Issued: 1994-12-17
Restoration of degraded subtropical thickets in the Baviaanskloof Megareserve, South Africa: the role of carbon stocks and Portulacaria afra survivorship
- Authors: Powell, Michael John
- Date: 2009
- Subjects: Portulacaria afra -- South Africa -- Eastern Cape , Portulacaceae -- South Africa -- Eastern Cape , Biodiversity conservation -- South Africa -- Eastern Cape , Plant conservation -- South Africa -- Eastern Cape , Shrubs -- South Africa -- Eastern Cape , Succulent plants -- South Africa -- Eastern Cape , Baviaanskloof (South Africa)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4764 , http://hdl.handle.net/10962/d1007164 , Portulacaria afra -- South Africa -- Eastern Cape , Portulacaceae -- South Africa -- Eastern Cape , Biodiversity conservation -- South Africa -- Eastern Cape , Plant conservation -- South Africa -- Eastern Cape , Shrubs -- South Africa -- Eastern Cape , Succulent plants -- South Africa -- Eastern Cape , Baviaanskloof (South Africa)
- Description: The semi-arid forms of subtropical thicket in the Eastern and Western Cape have been heavily degraded through unsustainable pastoralism over the last century or more. The degraded areas exhibit a significant loss of above-ground and belowground carbon stocks, and consequently provide an opportunity for restoration through the formal and informal carbon markets. A prerequisite for the attainment of carbon credits is to ensure sound carbon stock baselines prior to effecting restoration. I report on the carbon stocks (including sub-pools) for a number of intact subtropical thicket types, as well as the differentials between the intact and degraded states (including the sub-pools). Total carbon stocks (TCS in t C ha⁻¹) for intact vegetation (to a soil depth 0–25 cm), ranged from 87.73±6.51 to 70.64±17.24. For degraded vegetation (including old lands), TCS (t C ha⁻¹) ranged from 34.05±3.61 to 21.03±2.70. For all vegetation types, the differentials in TCS along the degradation gradient (0–25 cm) are highly significant and strengthen the possibility for carbon credit financing to catalyse the restoration of the degraded semi-arid subtropical thickets. This study has shown a mean loss of 57.23 t C ha⁻¹ in Baviaanskloof spekboom thickets, when measured to a soil depth of 25 cm. Portulacaria afra is a key species within the semi-arid subtropical thickets, being a canopy dominant and a driver of soil nutrient status, but has been largely lost from the degraded landscapes. Degraded semi-arid subtropical thicket vegetation lacks regeneration via seedling recruitment; restoration therefore requires the manual replanting of P. afra using cut truncheons. Survivorship trials were undertaken infield in 2005 to establish restoration protocols for P. afra, with survivorship being recorded in 2006 and 2008. Overall survivorship for all treatments was found to be 43.2±2.8% in 2006, dropping to 35.8±2.7% in 2008. Planting posture (flat or upright) showed the most significant results of all the factors tested in 2006 and 2008. Micro-damming also influenced survivorship in that micro-damming was associated with marginally higher survivorship (47.4 ±2.0% with damming vs. 39.1±1.5% without damming in 2006, and 39.3±1.9% vs. 32.3±1.5% in 2008). Higher planting density only showed a significant positive impact on survivorship in 2008. Neither stem diameter nor clumping significantly affected degree of survival. A key finding in the study has been the non-static nature of P. afra truncheon survivorship, even after being well established (three years since planting). The results from the study will guide the restoration protocols for the restoration of degraded subtropical thickets, where P. afra requires replanting.
- Full Text:
- Date Issued: 2009