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Journal articles on the topic 'Spekboom – South Africa – Karoo'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

van der Vyver, Marius L., Anthony J. Mills, and Richard M. Cowling. "A biome-wide experiment to assess the effects of propagule size and treatment on the survival of Portulacaria afra (spekboom) truncheons planted to restore degraded subtropical thicket of South Africa." PLOS ONE 16, no. 4 (2021): e0250256. http://dx.doi.org/10.1371/journal.pone.0250256.

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Insights from biome-wide experiments can improve efficacy of landscape-scale ecological restoration projects. Such insights enable implementers to set temporal and geographical benchmarks and to identify key drivers of success during the often decades-long restoration trajectory. Here we report on a biome-wide experiment aimed at informing the ecological restoration of thousands of hectares of degraded subtropical thicket dominated by the succulent shrub, Portulacaria afra (spekboom). Restoration using spekboom truncheons has the potential to sequester, for a semi-arid region, large amounts of

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2

Rubin, F., A. R. Palmer, and C. Tyson. "Patterns of endemism within the Karoo National Park, South Africa." Bothalia 31, no. 1 (2001): 117–33. http://dx.doi.org/10.4102/abc.v31i1.510.

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A checklist of 864 plant taxa representing 355 genera and 93 families is given for the Karoo National Park. A total of 121 species are endemic to the Nama-Karoo, with Asteraceae the most common with 33 taxa. followed by Mesembryanthemaceae with 26 taxa. Phytochorological affinities indicate that 19.8% of the species are from the Nama- Karoo Biome only, another 19.8% are distributed over two biomes, and 41% of the species have a widespread distribution. The Karoo National Park conserves 30% of the recognized endemics of the Nama-Karoo Biome.

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3

Catuneanu, O., H. Wopfner, P. G. Eriksson, et al. "The Karoo basins of south-central Africa." Journal of African Earth Sciences 43, no. 1-3 (2005): 211–53. http://dx.doi.org/10.1016/j.jafrearsci.2005.07.007.

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4

Turner, Brian R. "Uranium mineralization in the Karoo Basin, South Africa." Economic Geology 80, no. 2 (1985): 256–69. http://dx.doi.org/10.2113/gsecongeo.80.2.256.

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5

SCHEIBER-ENSLIN, S. E., S. J. WEBB, and J. EBBING. "GEOPHYSICALLY PLUMBING THE MAIN KAROO BASIN, SOUTH AFRICA." South African Journal of Geology 117, no. 2 (2014): 275–300. http://dx.doi.org/10.2113/gssajg.117.2.275.

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6

Hulley, I. M., B. E. Van Wyk, and A. L. Schutte-Vlok. "Medicinal ethnobotany of the Little Karoo, South Africa." South African Journal of Botany 98 (May 2015): 180. http://dx.doi.org/10.1016/j.sajb.2015.03.049.

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7

Botha, J. F., and A. H. J. Cloot. "Deformations and the Karoo aquifers of South Africa." Advances in Water Resources 27, no. 4 (2004): 383–98. http://dx.doi.org/10.1016/j.advwatres.2004.02.014.

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8

Duncan, G. D. "Five new species of Lachenalia (Hyacinthaceae) from arid areas of Namibia and South Africa." Bothalia 27, no. 1 (1997): 7–15. http://dx.doi.org/10.4102/abc.v27i1.648.

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Five new species of Lachenalia are described: L. aurioliae G.D.Duncan from the Little Karoo and Great Karoo, L. obscura Schltr. ex G.D.Duncan from Namaqualand, the Kamiesberg, the western Great Karoo and the Little Karoo, L. inconspicua G.D.Duncan from the Kamiesberg, western Bushmanland and southern Namaqualand, L. marlothii W.F.Barkerex G.D.Duncan from the Calvinia-Sutherland region of the western Great Karoo, and L. xerophila Schltr. ex G.D.Duncan from northwesternand central Namaqualand, and western Bushmanland.

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9

Bühmann, C. "Parent Material and Pedogenic Processes in South Africa." Clay Minerals 29, no. 2 (1994): 239–46. http://dx.doi.org/10.1180/claymin.1994.029.2.09.

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AbstractThe soils over about half of South Africa are developed from sedimentary rocks of the Karoo Supergroup. Some units within the Karoo strata display variations in their mineralogical composition which correlate with fluctuations in the environment of deposition and with palaeotemperature. The former trends are reflected in the ratio of kaolinite to 2:1 layer-silicates, range from kaolinite-dominated to kaolinite-free, and are particularly evident in rocks of the Vryheid Formation. Geothermal history is preserved in various stages of smectite illitization ranging from R = 0 structures wit

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10

Bordy, E. M., S. Spelman, D. I. Cole, and P. Mthembi. "Lithostratigraphy of the Pietermaritzburg Formation (Ecca Group, Karoo Supergroup), South Africa." South African Journal of Geology 120, no. 2 (2017): 293–302. http://dx.doi.org/10.25131/gssajg.120.2.293.

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Abstract The Lower Permian Pietermaritzburg Formation is a mudrock-dominated, upward-coarsening stratigraphic unit in the lower Ecca Group (Karoo Supergroup) in the northeastern part of the main Karoo Basin of South Africa. The formation extends over most of the KwaZulu-Natal Province, and due to its lithology and the local climate, it is usually poorly exposed; hence the description is mainly based on borehole records. From a measured thickness of about 430 m south of the type area around Pietermaritzburg, the formation thins progressively northwards and pinches out against the Dwyka Group an

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11

BORDY, E. M., and R. PREVEC. "LITHOSTRATIGRAPHY OF THE EMAKWEZINI FORMATION (KAROO SUPERGROUP), SOUTH AFRICA." South African Journal of Geology 118, no. 3 (2015): 307–10. http://dx.doi.org/10.2113/gssajg.118.3.307.

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12

BORDY, E. M., and P. ERIKSSON. "LITHOSTRATIGRAPHY OF THE ELLIOT FORMATION (KAROO SUPERGROUP), SOUTH AFRICA." South African Journal of Geology 118, no. 3 (2015): 311–16. http://dx.doi.org/10.2113/gssajg.118.3.311.

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13

Cole, D. I., M. R. Johnson, and M. O. Day. "Lithostratigraphy of the Abrahamskraal Formation (Karoo Supergroup), South Africa." South African Journal of Geology 119, no. 2 (2016): 415–24. http://dx.doi.org/10.2113/gssajg.119.2.415.

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14

Boardman, J., and I. Foster. "Badland and gully erosion in the Karoo, South Africa." Journal of Soil and Water Conservation 63, no. 4 (2008): 121A—125A. http://dx.doi.org/10.2489/jswc.63.4.121a.

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15

VAN ROOYEN, M. W., and A. J. DE VILLIERS. "Germination patterns in the Succulent Karoo Biome, South Africa." Transactions of the Royal Society of South Africa 59, no. 2 (2004): 31–38. http://dx.doi.org/10.1080/00359190409519158.

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16

Venter, J. C., and M. T. Mebrhatu. "Modelling of rainfall occurrences at Grootfontein (Karoo, South Africa)." South African Journal of Plant and Soil 22, no. 2 (2005): 127–28. http://dx.doi.org/10.1080/02571862.2005.10634694.

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17

Rubidge, B. S., and M. O. Day. "Biostratigraphy of the Eodicynodon Assemblage Zone (Beaufort Group, Karoo Supergroup), South Africa." South African Journal of Geology 123, no. 2 (2020): 141–48. http://dx.doi.org/10.25131/sajg.123.0010.

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Abstract The middle Permian Eodicynodon Assemblage Zone is the lowermost biozone of the Beaufort Group (Adelaide Subgroup, Karoo Supergroup) and occurs in the southwestern part of the main Karoo Basin. It is host to a diverse assemblage of basal therapsid genera of which Eodicynodon is the most abundant. The biozone reaches a maximum thickness of 1 100 m in the Prince Albert Road area and thins to the east and west. The biozone corresponds to the Combrinkskraal and Grootfontein members of the Abrahamskraal Formation, directly overlies the Waterford Formation of the Ecca Group, and records the

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18

Viglietti, P. A., B. W. McPhee, E. M. Bordy, et al. "Biostratigraphy of the Scalenodontoides Assemblage Zone (Stormberg Group, Karoo Supergroup), South Africa." South African Journal of Geology 123, no. 2 (2020): 239–48. http://dx.doi.org/10.25131/sajg.123.0017.

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Abstract The Scalenodontoides Assemblage Zone (SAZ) is the oldest fossil tetrapod biozone of the Stormberg Group (Karoo Supergroup) and preserves the oldest dinosaur bearing deposits in the Karoo Basin. The SAZ represents a revision of the ‘Euskelosaurus’ Range Zone, whose taxonomic basis has been undermined because ‘Euskelosaurus’ is well demonstrated to be a nomen dubium. Recent qualitative and quantitative investigations into the biostratigraphy of the Elliot and Clarens formations have resulted in the ﬁrst biostratigraphic review of all lower Elliot Formation (lEF) taxa in nearly 40 years.

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19

Bezuidenhout, L. J., M. Doucouré, V. Wagener, et al. "Rayleigh group velocity extraction from ambient seismic noise to map the south Eastern Cape Karoo region, South Africa." South African Journal of Geology 120, no. 3 (2017): 341–50. http://dx.doi.org/10.25131/gssajg.120.3.341.

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Abstract The Karoo region of South Africa is an ideal laboratory to use ambient seismic signals to map the shallow subsurface, as it is a quiet and pristine environment with a geology that is relatively well known. Ambient seismic signals were continuously recorded for a ten week period between August and October 2015. The ambient seismic noise network consisted of two groups of 17 temporary, stand-alone seismic stations each. These were installed in the southeastern Cape Karoo region, near the town of Jansenville. Here we present data on the retrieval and coherency of Rayleigh surface waves e

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20

Brauer, B., T. Ryberg, and A. S. Lindeque. "Shallow seismic velocity structure of the Karoo Basin, South Africa." South African Journal of Geology 110, no. 2-3 (2007): 439–48. http://dx.doi.org/10.2113/gssajg.110.2-3.439.

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21

Hallinan, Emily, and Matthew Shaw. "Nubian Levallois reduction strategies in the Tankwa Karoo, South Africa." PLOS ONE 15, no. 10 (2020): e0241068. http://dx.doi.org/10.1371/journal.pone.0241068.

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22

Villiers, A. J. De, M. W. Van Rooyen, and G. K. Theron. "Seed bank classification of the Strandveld Succulent Karoo, South Africa." Seed Science Research 12, no. 1 (2002): 57–67. http://dx.doi.org/10.1079/ssr200198.

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Laboratory characteristics of seeds of 37 species (41 seed types) from the Strandveld Succulent Karoo were used to predict seed bank types according to a modified key of ). Five seed bank strategies were recognized for this vegetation type, i.e. two with transient and three with persistent seed bank strategies. Of the 37 species investigated, 32% (all perennial species) had transient seed bank strategies, while 68% had persistent seed bank strategies. Seed dispersal of these 37 species was mainly anemochorous, although antitelechoric elements such as myxospermy, hygrochasy, heterodiaspory and

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23

Lechmere‐Oertel, Richard G., and Richard M. Cowling. "Abiotic determinants of the fynbos/succulent karoo boundary, South Africa." Journal of Vegetation Science 12, no. 1 (2001): 75–80. http://dx.doi.org/10.1111/j.1654-1103.2001.tb02618.x.

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24

Harkness, Jennifer S., Kelley Swana, William K. Eymold, et al. "Pre-drill Groundwater Geochemistry in the Karoo Basin, South Africa." Groundwater 56, no. 2 (2018): 187–203. http://dx.doi.org/10.1111/gwat.12635.

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25

Visser, N., C. Morris, MB Hardy, and JC Botha. "Restoring bare patches in the Nama-Karoo of South Africa." African Journal of Range & Forage Science 24, no. 2 (2007): 87–96. http://dx.doi.org/10.2989/ajrfs.2007.24.2.5.159.

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26

Holmes, P. J., J. Boardman, A. J. Parsons, and M. E. Marker. "Geomorphological palaeoenvironments of the Sneeuberg Range, Great Karoo, South Africa." Journal of Quaternary Science 18, no. 8 (2003): 801–13. http://dx.doi.org/10.1002/jqs.799.

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27

Hoffman, M. Timm. "Environmental History and the Desertification of the Karoo, South Africa." Giornale botanico italiano 129, no. 1 (1995): 261–73. http://dx.doi.org/10.1080/11263509509436134.

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28

Beukes, P. C., and R. M. Cowling. "Evaluation of Restoration Techniques for the Succulent Karoo, South Africa." Restoration Ecology 11, no. 3 (2003): 308–16. http://dx.doi.org/10.1046/j.1526-100x.2003.00192.x.

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29

Hall, A. V. "Threatened plants in the fynbos and karoo biomes, South Africa." Biological Conservation 40, no. 1 (1987): 29–52. http://dx.doi.org/10.1016/0006-3207(87)90011-5.

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30

Lechmere-Oertel, Richard G., and Richard M. Cowling. "Abiotic Determinants of the Fynbos / Succulent Karoo Boundary, South Africa." Journal of Vegetation Science 12, no. 1 (2001): 75. http://dx.doi.org/10.2307/3236675.

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31

Chesselet, P., S. Hammer, and I. Oliver. "MESEMBRYANTHEMACEAE." Bothalia 33, no. 2 (2003): 160–64. http://dx.doi.org/10.4102/abc.v33i2.448.

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32

Duncan, G. "Five new species of Lachenalia (Hyacinthaceae) from arid areas of Namibia and South Africa." Bothalia 28, no. 2 (1998): 131–39. http://dx.doi.org/10.4102/abc.v28i2.630.

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Five new species of Lachenalia are described: L. nutans G.D.Duncan from southwestern Namibia, L. attenuata W.F.Barker ex G.D Duncan from the Roggeveld Plateau. Little Karoo and southern Cape; L doleritica G.D.Duncan from the Bokkeveld Plateau; L lactosa G.D.Duncan from the Lowland Fvnbos of the Hermanus District, and L leipoldtii G D Duncan from the Olifants River Valley and Little Karoo

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33

Viglietti, P. A., B. W. McPhee, E. M. Bordy, et al. "Biostratigraphy of the Massospondylus Assemblage Zone (Stormberg Group, Karoo Supergroup), South Africa." South African Journal of Geology 123, no. 2 (2020): 249–62. http://dx.doi.org/10.25131/sajg.123.0018.

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Abstract The Massospondylus Assemblage Zone is the youngest tetrapod biozone in the Karoo Basin (upper Stormberg Group, Karoo Supergroup) and records one of the oldest dinosaur dominated ecosystems in southern Gondwana. Recent qualitative and quantitative investigations into the biostratigraphy of the lower and upper Elliot formations (lEF, uEF) and Clarens Formation in the main Karoo Basin resulted in the ﬁrst biostratigraphic review of this stratigraphic interval in nearly four decades, allowing us to introduce a new biostratigraphic scheme, the Massospondylus Assemblage Zone (MAZ). The MAZ

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34

BROWNLIE, SUSIE, CHARL DE VILLIERS, AMANDA DRIVER, NANCY JOB, AMREI VON HASE, and KRISTAL MAZE. "SYSTEMATIC CONSERVATION PLANNING IN THE CAPE FLORISTIC REGION AND SUCCULENT KAROO, SOUTH AFRICA: ENABLING SOUND SPATIAL PLANNING AND IMPROVED ENVIRONMENTAL ASSESSMENT." Journal of Environmental Assessment Policy and Management 07, no. 02 (2005): 201–28. http://dx.doi.org/10.1142/s1464333205001992.

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The Cape Floristic Region (CFR) and Succulent Karoo are global biodiversity hotspots. The CFR is one of six plant kingdoms worldwide. The CFR and most of the Succulent Karoo lie within South Africa. South Africa has ratified the Biodiversity Convention, and must accordingly safeguard its biodiversity. Environmental assessment (EA) can help to achieve this end. Environmental legislation in South Africa requires EA for activities at project, not strategic level. However, strategic environmental assessment has been mandatory since 2000 for preparing municipal spatial development frameworks (SDFs)

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35

Jonker, E., and M. Saayman. "Socio-demographic analysis of Festival Entrepreneurs in South Africa." Southern African Journal of Entrepreneurship and Small Business Management 3, no. 1 (2010): 1. http://dx.doi.org/10.4102/sajesbm.v3i1.19.

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<p>The purpose of this article is to examine the socio-demographic differences between entrepreneurs at National Arts festivals in South Africa. Language, and specifically Afrikaans, English and African languages, was used as the dependent variable. The Klein Karoo National Arts Festival (KKNK) in Oudtshoorn and the Grahamstown National Arts Festival (GNAF) are the two largest arts festivals in South Africa. The research was conducted by means of a questionnaire survey (N=500). The data from KKNK and GNAF were combined and factor analyses were applied to determine the role and attributes

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36

BARATH, S., and J. N. DUNLEVEY. "GOLD IN KAROO SUPERGROUP HEAVY-MINERAL DEPOSITS, KWAZULU-NATAL, SOUTH AFRICA." South African Journal of Geology 113, no. 4 (2010): 437–44. http://dx.doi.org/10.2113/gssajg.113.4.437.

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37

Dean, W. R. J., M. T. Hoffinan, M. E. Meadows, and S. J. Milton. "Desertification in the semi-arid Karoo, South Africa: review and reassessment." Journal of Arid Environments 30, no. 3 (1995): 247–64. http://dx.doi.org/10.1016/s0140-1963(05)80001-1.

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38

Wickens, H. de V., and D. I. Cole. "Lithostratigraphy of the Skoorsteenberg Formation (Ecca Group, Karoo Supergroup), South Africa." South African Journal of Geology 120, no. 3 (2017): 433–46. http://dx.doi.org/10.25131/gssajg.120.3.433.

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Abstract The Middle Permian Skoorsteenberg Formation is part of the Ecca Group (Karoo Supergroup) of South Africa. It is also known as the ‘Tanqua fan complex’ due to its origin as a deep-water sedimentation unit associated with a prograding deltaic system. The Skoorsteenberg Formation crops out over approximately 650 km2 along the western margin of the Main Karoo Basin. It thins out in a northerly and easterly direction and therefore has a limited extent with cut-off boundaries to the south and north. It is underlain by the Tierberg Formation and overlain by the Kookfontein Formation, the lat

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39

de V. Wickens, H., and D. I. Cole. "Lithostratigraphy of the Kookfontein Formation (Ecca Group, Karoo Supergroup), South Africa." South African Journal of Geology 120, no. 3 (2017): 447–58. http://dx.doi.org/10.25131/gssajg.120.3.447.

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Abstract The Permian Kookfontein Formation forms part of the upper Ecca Group in the southwestern part of the main Karoo Basin of South Africa. It occupies a stratigraphic position between the underlying Skoorsteenberg Formation and the overlying Waterford Formation, with its regional extent limited to the cut-off boundaries of the Skoorsteenberg Formation. The Kookfontein Formation has an average thickness of 200 m, coarsens upwards, and predominantly comprises dark grey shale, siltstone and thin- to thick-bedded, fine- to very fine-grained, feldspathic litharenite. Characteristic upward-coar

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40

Bordy, E. M. "Lithostratigraphy of the Tshidzi Formation (Dwyka Group, Karoo Supergroup), South Africa." South African Journal of Geology 121, no. 1 (2018): 109–18. http://dx.doi.org/10.25131/sajg.121.0008.

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41

Bordy, E. M., and H. V. Head. "Lithostratigraphy of the Clarens Formation (Stormberg Group, Karoo Supergroup), South Africa." South African Journal of Geology 121, no. 1 (2018): 119–30. http://dx.doi.org/10.25131/sajg.121.0009.

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42

Steyn, H. M., S. P. Bester, and H. Bezuidenhout. "An updated plant checklist for Tankwa Karoo National Park, South Africa." South African Journal of Botany 88 (September 2013): 247–51. http://dx.doi.org/10.1016/j.sajb.2013.07.018.

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43

Tankard, Anthony, Herman Welsink, Peter Aukes, Robert Newton, and Edgar Stettler. "Tectonic evolution of the Cape and Karoo basins of South Africa." Marine and Petroleum Geology 26, no. 8 (2009): 1379–412. http://dx.doi.org/10.1016/j.marpetgeo.2009.01.022.

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44

Retallack, Gregory J., Roger M. H. Smith, and Peter D. Ward. "Vertebrate extinction across Permian–Triassic boundary in Karoo Basin, South Africa." Geological Society of America Bulletin 115, no. 9 (2003): 1133. http://dx.doi.org/10.1130/b25215.1.

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45

Broom, R., and J. T. Robinson. "Some Now Fossil Reptiles from the Karoo Beds of South Africa." Proceedings of the Zoological Society of London 118, no. 2 (2009): 392–407. http://dx.doi.org/10.1111/j.1096-3642.1948.tb00384.x.

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46

Haycock, C. A., T. R. Mason, and M. K. Watkeys. "Early Triassic palaeoenvironments in the eastern Karoo Foreland Basin, South Africa." Journal of African Earth Sciences 24, no. 1-2 (1997): 79–94. http://dx.doi.org/10.1016/s0899-5362(97)00028-6.

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47

EGOH, BENIS N., BELINDA REYERS, JOSIE CARWARDINE, et al. "Safeguarding Biodiversity and Ecosystem Services in the Little Karoo, South Africa." Conservation Biology 24, no. 4 (2010): 1021–30. http://dx.doi.org/10.1111/j.1523-1739.2009.01442.x.

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48

Hulley, M., BE van Wyk, and AL Schutte-Vlok. "Traditional medicine of the Little Karoo, Western Cape Province, South Africa." Planta Medica 81, S 01 (2016): S1—S381. http://dx.doi.org/10.1055/s-0036-1596477.

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49

Shaw, Jessica M., Rona van der Merwe, Emily van der Merwe, and Peter G. Ryan. "Winter Scavenging Rates Under Power Lines in the Karoo, South Africa." African Journal of Wildlife Research 45, no. 1 (2015): 122–26. http://dx.doi.org/10.3957/056.045.0112.

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50

Cawthorn, R. Grant, John W. Bristow, and David I. Groves. "Magnesian ilmenite in picritic basalts from the Karoo Province, South Africa." Mineralogical Magazine 53, no. 370 (1989): 245–52. http://dx.doi.org/10.1180/minmag.1989.053.370.12.

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AbstractSome picritic lavas from near the base of the volcanic succession in the Lebombo region of the Karoo Province contain phenocrysts of olivine and skeletal microphenocrysts of ilmenite, the latter indicating rapid crystallization from the magma. These ilmenite grains contain up to 6% MgO. The near-liquidus crystallization and the high MgO content of the ilmenite are highly anomalous for ilmenite in tholeiitic rocks. These features reflect the atypical nature (high MgO and TiO2) of the parental magma and/or highly reduced conditions of crystallization.

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