Effects of heuweltjies and utilization on vegetation patterns in the Succulent Karoo, South Africa

Journal of Arid Environments

Volumn 87, Issue , 2012, Pages 198-205

  Kunz, N S ^a   Hoffman, M T ^b   Weber, B ^a  

^a University of Koblenz Landau   (Germany)

^b UNIVERSITY OF CAPE TOWN   (South Africa)

Author keywords

Ecosystem engineering; General Linear Model; Heuweltjies; Palatability; Succulent Karoo; Utilization

Indexed keywords

BIOME; ECOSYSTEM ENGINEERING; ENVIRONMENTAL DEGRADATION; FUNCTIONAL GROUP; GEOPHYTE; GRAZING PRESSURE; PALATABILITY; VASCULAR PLANT; VEGETATION MAPPING;

SUCCULENT KAROO;

ANIMALIA; ISOPTERA; TRACHEOPHYTA;

EID: 84865814711     PISSN: 01401963     EISSN: 1095922X     Source Type: Journal    
DOI: 10.1016/j.jaridenv.2012.05.007     Document Type: Article

References (41)

1. Anderson P.M.L., Hoffman M.T. The impacts of sustained heavy grazing on plant diversity and composition in lowland and upland habitats across the Kamiesberg mountain range in the Succulent Karoo, South Africa. Journal of Arid Environments 2007, 70:686-700.
2. Anderson P.M.L., Hoffman M.T., O'Farrell P.J. Above ground perennial plant biomass across an altitudinal and land-use gradient in Namaqualand, South Africa. South African Journal of Botany 2010, 76:471-481.
3. Anonymous, 1984. Conservation of Agricultural Resources Act, 1983 (Act 43 of 1983). Government Gazette 227(9238).
4. Armstrong A.J., Siegfried W.R. Selective use of heuweltjie earth mounds by sheep in the Karoo. South African Journal of Ecology 1990, 1:77-80.
5. Belnap J. Surface disturbances: their role in accelerating desertification. Environmental Monitoring and Assessment 1995, 37:39-57.
6. BIOTA Southern Africa Weather data Quaggasfontein-Soebatsfont 2010, http://www.biota-africa.org/index.php%3fPage_ID%3dL900.
7. Black H.I.J., Okwakol M.J.N. Agricultural intensification, soil biodiversity and agroecosystem function in the tropics: the role of termites. Applied Soil Ecology 1997, 6:37-53.
8. Coley P.D., Bryant J.P., Chapin F.S. Resource availability and plant antiherbivore defence. Science 1985, 230:895-899.
9. Cowling R.M., Esler K.J., Rundel P.W. Namaqualand, South Africa - An overview of a unique winter-rainfall desert ecosystem. Plant Ecology 1999, 142:3-21.
10. Cox G.W., Lovegrove B.G., Siegfried W.R. The small stone content of mima-like mounds in the South African Cape region: implications for mound origin. CATENA 1987, 14:165-176.
11. Desmet P.G., Cowling R.M. Biodiversity, habitat and range-size aspects of a flora from a winter-rainfall desert in north-western Namaqualand, South Africa. Plant Ecology 1999, 142:23-33.
12. Desmet P.G. Namaqualand - a brief overview of the physical and floristic environment. Journal of Arid Environments 2007, 70:570-587.
13. Esler K.J., Rundel P.W., Vorster P. Biogeography of prostrate-leaved geophytes in semi-arid South Africa: hypotheses on functionality. Plant Ecology 1999, 142:105-120.
14. Fleming P.A., Loveridge J.P. Miombo woodland termite mounds: resource islands for small vertebrates?. Journal of Zoology 2003, 259:161-168.
15. Francis M.L., Fey M.V., Prinsloo H.P., Ellis F., Mills A.J., Medinski T.V. Soils of Namaqualand: compensations for aridity. Journal of Arid Environments 2007, 70:588-603.
16. Hendricks H.H., Bond W.J., Midgley J.J., Novellie P.A. Plant species richness and composition a long livestock grazing intensity gradients in a Namaqualand (South Africa) protected area. Plant Ecology 2005, 176:19-33.
17. Herpel N. The scale-dependent variability of topsoil properties reflecting ecosystem patchiness in drylands of southern Africa. Hamburger Bodenkundliche Arbeiten 2008, 62:1-299.
18. Holt J.A., Lepage M. Termites and soil properties. Termites: Evolution, Sociality, Symbiosis, Ecology 2000, 389-408. Kluwer Academic Publishers, Dordrecht. T. Abe, D.E. Bignell, M. Higashi (Eds.).
19. Jones C.G., Lawton J.H., Shachak M. Organisms as ecosystem engineers. Oikos 1994, 69:373-386.
20. Jürgens N. A new approach to the Namib Region - I: phytogeographic subdivision. Vegetatio 1991, 97:21-38.
21. Knight R.S., Rebelo A.G., Siegfried W.R. Plant assemblages on mima-like earth mounds in the Clanwillian district, South Africa. South African Journal of Botany 1989, 55:465-472.
22. Lovegrove B.G., Siegfried W.R. Distribution and formation of mima-like earth mounds in the western Cape Province of South Africa. South African Journal of Science 1986, 82:432-436.
23. Lovegrove B.G., Siegfried W.R. Spacing and origin(s) of mima-like earth mounds in the Cape Province of South Africa. South African Journal of Science 1989, 85:108-112.
24. Loveridge J.P., Moe S.R. Termitaria as browsing hotspots for African megaherbivores in miombo woodland. Journal of Tropical Ecology 2004, 20:337-343.
25. Midgley G.F., Musil C.F. Substrate effects of zoogenic soil mounds on vegetation composition in the Worcester-Robertson valley, Cape Province. South African Journal of Botany 1990, 56:158-166.
26. 14C analyses. South African Journal of Science 2002, 98:202-204.
27. Mobæk R., Narmo A.K., Moe S.R. Termitaria are focal feeding sites for large ungulates in Lake Mburo National Park, Uganda. Journal of Zoology 2005, 267:97-102.
28. Moore J.M., Picker M.D. Heuweltjies (earth mounds) in the Clanwilliam district, Cape Province, South Africa: 4000-year-old termite nests. Oecologia 1991, 86:424-432.
29. The Vegetation of South Africa, Lesotho and Swaziland, Strelitzia 2006, vol. 19. South African National Biodiversity Institute, Pretoria.
30. Myers N., Mittermeier R.A., Mittermeier C.G., da Fonseca G.A.B., Kent J. Biodiversity hotspots for conservation priorities. Nature 2000, 403:853-858.
31. Noy-Meir I., Gutman M., Kaplan Y. Responses of mediterranean grassland plants to grazing and protection. Journal of Ecology 1989, 77:290-310.
32. Petersen A., Gröngröft A., Miehlich G. Einfluss der Termiten auf die Pedodiversität südafrikanischer Trockengebiete. Mitteilungen der Deutschen Bodenkundlichen Gesellschaft 2003, 102:313-314.
33. Picker M.D., Hoffman M.T., Leverton B. Density of Microhodotermes viator (Hodotermitidae) mounds in southern Africa in relation to rainfall and vegetative productivity gradients. Journal of Zoology 2007, 271:37-44.
34. Rahlao S.J., Hoffman M.T., Todd S.W., McGrath K. Long-term vegetation change in the Succulent Karoo, South Africa following 67 years of rest from grazing. Journal of Arid Environments 2008, 72:808-819.
35. Rutherford M.C., Powrie L.W. Severely degraded rangeland: implications for plant diversity from a case study in Succulent Karoo, South Africa. Journal of Arid Environments 2010, 74:692-701.
36. Scheffer F. Scheffer/Schachtschabel - Lehrbuch der Bodenkunde 2002, Spektrum Akademischer Verlag, Heidelberg, Berlin. fifteenth ed.
37. Schmiedel U., Linke T., Christiaan R.A., Falk T., Gröngröft A., Haarmeyer D.H., Hanke W., Henstock R., Hoffman M.T., Kunz N., Labitzky T., Luther-Mosebach J., Lutsch N., Meyer S., Petersen A., Röwer I.U., van der Merwe H., van Rooyen M.W., Vollan B., Weber B. Environmental and socio-economic patterns and processes in the Succulent Karoo - frame conditions for the management of this biodiversity hotspot. Implications for Landuse and Management 2010, vol. 3:109-150. Klaus Hess Publishers, Göttingen & Windhoek. M.T. Hoffman, U. Schmiedel, N. Jürgens (Eds.).
38. Steubing L., Fangmeier A. Pflanzenökologisches Praktikum: Gelände- und Laborpraktikum der terrestrischen Pflanzenökologie 1992, Ulmer Verlag, Stuttgart. first ed.
39. Todd S.W., Hoffman M.T. A fence-line contrast reveals effects of heavy grazing on plant diversity and community composition in Namaqualand, South Africa. Plant Ecology 1999, 142:169-178.
40. Todd S.W., Hoffman M.T. A fence line in time demonstrates grazing-induced vegetation shifts and dynamics in the semiarid Succulent Karoo. Ecological Applications 2009, 19:1897-1908.
41. Wood T.G. Termites and the soil environment. Biology and Fertility of Soils 1988, 6:228-236.