The “eco-story” of a mountain range: the development of Socio-Ecological Disturbance Regimes in the northern Drakensberg and consequences for grassland-plant diversity

References

• Adcock, K. 1991. Vegetation changes since withdrawal of fire from catchment IX, Cathedral Peak, Natal, Drakensberg. MSc thesis. University of the Witwatersrand, Pietermaritzburg.
   Google Scholar
• Adie, H., Kotze, D.J. & Lawes, M.J. 2017. Small fire refugia in the grassy matrix and the persistence of Afrotemperate forest in the Drakensberg mountains. Scientific Reports 7: 1–10.
   PubMed Web of Science ®Google Scholar
• Archibald, S., Staver, A.C. & Levin, S.A. 2012. Evolution of human-driven fire regimes in Africa. Proceedings of the National Academy of Sciences 109 (3): 847–852.
   PubMed Web of Science ®Google Scholar
• Arnold, E.R., Greenfield, H.J. & Creaser, R.A. 2013. Domestic cattle mobility in early farming villages in southern Africa: harvest profiles and strontium (87Sr/86Sr) isotope analyses from Early Iron Age sites in the lower Thukela River Valley of South Africa. Archaeological and Anthropological Sciences 5 (2): 129–144.
   Web of Science ®Google Scholar
• Asmal, O.E. 1995. Land degradation in the Cathedral Peak area of the Natal Drakensberg: 1945 to 1992. MA thesis. University of Cape Town, Department of Environmental and Geographical Science, Rondebosch.
   Google Scholar
• Bennett, B. & Kruger, F. 2015. Forestry and Water Conservation in South Africa. Canberra, ANU Press.
   Google Scholar
• Biggs, R. & Scholes, R.J. 2002. Land-cover changes in South Africa 1911–1993: research in action. South African Journal of Science 98 (9 and 10): 420–424.
   Web of Science ®Google Scholar
• Bond, W.J. 2019. Open Ecosystems: Ecology and Evolution Beyond the Forest Edges. Oxford, Oxford University Press.
   Google Scholar
• Boshoff, A. & Kerley, G. 2015. Lost herds of the highveld: evidence from the written, historical record. South African Journal of Wildlife Research 45 (3): 287–300.
   Google Scholar
• Botha, G., Scott, L., Vogel, J. & von Brunn, V. 1992. Palaeosols and palaeoenvironments during the Late Pleistocene hypothermal in northern Natal. South African Journal of Science 88: 508–512.
   Web of Science ®Google Scholar
• Carbutt, C. 2019. The Drakensberg Mountain Centre: a necessary revision of southern Africa’s high-elevation centre of plant endemism. South African Journal of Botany 124: 508–529.
   Web of Science ®Google Scholar
• Carbutt, C. & Edwards, T.J. 2015. Plant–soil interactions in lower–upper montane systems and their implications in a warming world: a case study from the Maloti-Drakensberg Park, southern Africa. Biodiversity 16 (4): 262–277.
   Google Scholar
• Carbutt, C., Tau, S. & Escott, B. 2011. The conservation status of temperate grasslands in southern Africa. Grass Roots 11 (1): 17–23.
   Google Scholar
• Ceballos, G., Ehrlich, P.R., Barnosky, A.D., Garca, A., Pringle, R.M. & Palmer, T.M. 2015. Accelerated modern human–induced species losses: entering the sixth mass extinction. Science Advances 1 (5): 1–5.
   Web of Science ®Google Scholar
• Chamane, S., Kirkman, K.P., Morris, C. & O’Connor, T.G. 2019. Response of three mesic South African perennial grassland forbs to defoliation and competition. African Journal of Range and Forage Science 36 (4): 191–195.
   Web of Science ®Google Scholar
• Chevalier, M. & Chase, B.M. 2015. Southeast African records reveal a coherent shift from high-to low-latitude forcing mechanisms along the east African margin across last glacial–interglacial transition. Quaternary Science Reviews 125: 117–130.
   Web of Science ®Google Scholar
• Christopher, A. 1979. The Natal interior. Contree 6: 18–23.
   Google Scholar
• Davies, B., Power, M.J., Braun, D.R., Douglass, M.J., Mosher, S.G., Quick, L.J., Esteban, I., Sealy, J., Parkington, J. & Faith, J.T. 2022. Fire and human management of late Holocene ecosystems in southern Africa. Quaternary Science Reviews 289: 107600.
   Web of Science ®Google Scholar
• Deacon, H.J. 1983. Another look at the Pleistocene climates of South Africa. South African Journal of Science 79 (8): 325–328.
   Google Scholar
• Deacon, H.J. & Deacon, J. 1999. Human beginnings in South Africa: uncovering the secrets of the Stone Age. Cape Town, David Philip Publishers (Pty) Ltd.
   Google Scholar
• de Deus Vidal, J., le Roux, P.C., Johnson, S.D., te Beest, M. & Clark, V.R. 2021. Beyond the tree-line: the C 3-C 4 grass-line can track global change in the worlds grassy mountain systems. Frontiers in Ecology and Evolution 9: 760118.
   Web of Science ®Google Scholar
• de Villiers, A. 1945. Notes on the Drought of 1945. Internal Report. Winterton, Department of Forestry.
   Google Scholar
• Everson, C. 1985. Ecological effects of fire in the montane grasslands of Natal. PhD thesis. University of Natal, School of Grassland Science, Pietermaritzburg.
   Google Scholar
• February, E. 1994. Palaeoenvironmental reconstruction in the Natal Drakensberg using wood charcoal as a conservation management tool. South African Journal of Science 90 (10): 549–551.
   Web of Science ®Google Scholar
• Finch, J.M., Hill, T.R., Meadows, M.E., Lodder, J. & Bodmann, L. 2021. Fire and montane vegetation dynamics through successive phases of human occupation in the northern Drakensberg, South Africa. Quaternary International 611: 70–80.
   Web of Science ®Google Scholar
• Findlay, N., Manson, A., Cromsigt, J.P., Gordijn, P., Nixon, C., Rietkerk, M., Thibaud, G., Wassen, M.J. & te Beest, M. 2022. Long-term frequent fires do not decrease topsoil carbon and nitrogen in an Afromontane grassland. African Journal of Range & Forage Science 39 (1): 44–55.
   Web of Science ®Google Scholar
• Froyd, C. & Willis, K. 2008. Emerging issues in biodiversity & conservation management: the need for a palaeoecological perspective. Quaternary Science Reviews 27 (17–18): 1723–1732.
   Web of Science ®Google Scholar
• Fynn, R.W.S., Morris, C.D. & Edwards, T.J. 2005. Long-term compositional responses of a South African mesic grassland to burning and mowing. Applied Vegetation Science 8 (1): 5–12.
   Web of Science ®Google Scholar
• Geological Survey, ZA. 1981. 1:250 000 Geological Series 2928 Drakensberg. Tech. Rep. Pretoria, Geological Survey.
   Google Scholar
• Gordijn, P.J. 2022. Maintaining plant diversity of a species-rich montane grassland system in the face of global change. PhD thesis. Faculty of Science, University of the Witwatersrand, Johannesburg.
   Google Scholar
• Gordijn, P.J., Everson, T.M. & O’Connor, T.G. 2018. Resistance of Drakensberg grasslands to compositional change depends on the influence of fire-return interval and grassland structure on richness and spatial turnover. Perspectives in Plant Ecology, Evolution and Systematics 34: 22–36.
   Web of Science ®Google Scholar
• Gordijn, P.J. & O’Connor, T.G. 2021. Multidecadal effects of fire in a grassland biodiversity hotspot: does pyrodiversity enhance plant diversity? Ecological Applications 31 (6): 1–19.
   Web of Science ®Google Scholar
• Grab, S.W., Linde, J. & de Lemos, H. 2017. Some attributes of snow occurrence and snowmelt/sublimation rates in the Lesotho Highlands: environmental implications. Water SA 43 (2): 333–342.
   Web of Science ®Google Scholar
• Granger, J.E. 1976. The vegetation changes, some related factors and changes in the water balance following 20 years of fire exclusion in Catchment IX. PhD thesis, University of Natal, School of Botanical Sciences, Pietermaritzburg.
   Google Scholar
• Granger, J.E. 1984. Vegetation of the Cathkin Key Area. Tech. Rep. Pietermaritzburg, Town and Regional Planning Commission.
   Google Scholar
• Greenfield, J.J. & van Schalkwyk, L.O. 2008. Animals and People: Archaeozoological Papers in Honour of Ina Plug. S. Badenhorst, P. Mitchell & J.C. Driver (Eds.). Oxford, Archaeopress.
   Google Scholar
• He, T., Lamont, B.B. & Pausas, J.G. 2019. Fire as a key driver of Earth’s biodiversity. Biological Reviews, (2019): 1983–2010.
   PubMed Web of Science ®Google Scholar
• Jewitt, D., Goodman, P.S., Erasmus, B.F.N., O’Connor, T.G. & Witkowski, E.T.F. 2015. Systematic land-cover change in KwaZulu-Natal, South Africa: implications for biodiversity. South African Journal of Science 111 (9/10): 1–9.
   Web of Science ®Google Scholar
• Killick, D. 1961. An account of the plant ecology of the Cathedral Peak area of the Natal Drakensberg. PhD thesis, University of Natal, School of Botanical Sciences, Pietermaritzburg.
   Google Scholar
• Kruger, F.J., Mitchell, D.T. & Jarvis, J.U. (Eds.). 2012. Mediterranean-Type Ecosystems: The Role of Nutrients. Vol. 43. Berlin, DE, Springer.
   Google Scholar
• Launchbaugh, K.L. & Howery, L.D. 2005. Understanding landscape use patterns of livestock as a consequence of foraging behavior. Rangeland Ecology and Management 58 (2): 99–108.
   Web of Science ®Google Scholar
• Lawes, M.J., Griffiths, M.E. & Boudreau, S. 2007. Colonial logging and recent subsistence harvesting affect the composition and physiognomy of a podocarp dominated Afrotemperate forest. Forest Ecology and Management 247 (1–3): 48–60.
   Web of Science ®Google Scholar
• Linder, H.P. 2014. The evolution of African plant diversity. Frontiers in Ecology and Evolution 2: 1–14.
   Web of Science ®Google Scholar
• Lodder, J. 2007. A Holocene fire history of the sub-alpine belt of the KwaZulu-Natal Drakensberg. Hons thesis. University of KwaZulu-Natal, School of Environmental Sciences, Pietermaritzburg.
   Google Scholar
• Maggs, T. 1982. Mgoduyanuka: terminal Iron-Age settlement in the Natal grasslands. Annuals of the Natal Museum 25 (1): 83–113.
   Google Scholar
• Maggs, T. 1988. Patterns and perceptions of stone-built settlements from the Thukela Valley Late Iron Age. Annals of the Natal Museum 29 (2): 417–432.
   Google Scholar
• Mander, M. 1998. Marketing of Indigenous Medicinal Plants in South Africa: A Case Study in KwaZulu-Natal. Tech. Rep. Rome, Food and Agriculture Organization of the United Nations.
   Google Scholar
• Manry, D. & Knight, R. 1986. Lightning density and burning frequency in South African vegetation. Vegetatio 66 (2): 67–76.
   Google Scholar
• Mazel, A.D. 1982. Evidence for pre-later Stone Age occupation of the Natal Drakensberg. Southern African Humanities 25 (1): 61–65.
   Google Scholar
• Mazel, A.D. 1989. People making history: the last ten thousand years of hunter-gatherer communities in the Thukela Basin. Southern African Humanities 1: 1–168.
   Google Scholar
• Meredith, D. 1943. Towards a national pastoral policy. South African Journal of Science 40 (11): 37–56.
   Google Scholar
• Morris, C.D. 2021. Buried but unsafe–defoliation depletes the underground storage organ (USO) of the mesic grassland geophyte, Hypoxis hemerocallidea. South African Journal of Botany 141: 265–272.
   Web of Science ®Google Scholar
• Mthimkhulu, O., Mthembu, J., Nene, B., Myeza, M., Evans, W., Rushworth, I., Krüger, S., Carbutt, C., Porter, I., Msomi, M., Blackmore, A., Goosen, M., van Vuuren, J., Rossouw, C. & van de Venter Radford, A. 2019. uKhahlamba Drakensberg Park: Integrated Management Plan. Version 2.0. Tech. Rep. Ezemvelo KwaZulu-Natal Wildlife.
   Google Scholar
• Mucina, L., et al. 2006. Chap. Grassland Biome. In Mucina, L. & Rutherford, M. (Eds.) The Vegetation of South Africa, Lesotho and Swaziland. Pretoria, Strelitzia. pp. 350–437.
   Google Scholar
• Nänni, U.W. 1969. Veld management in the Natal Drakensberg. South African Forestry Journal 68: 5–15.
   Google Scholar
• Nänni, U.W. 1970. The effect of afforestation on streamflow at Cathedral Peak: Report No. 1. South African Forestry Journal 74 (1): 6–12.
   Google Scholar
• Nerlekar, A.N. & Veldman, J.W. 2020. High plant diversity and slow assembly of old-growth grasslands. Proceedings of the National Academy of Sciences 117 (31): 18550–18556.
   PubMed Web of Science ®Google Scholar
• Neumann, F.H., Botha, G.A. & Scott, L. 2014. 18,000 years of grassland evolution in the summer rainfall region of South Africa: evidence from Mahwaqa mountain, KwaZulu-Natal. Vegetation History and Archaeobotany 23 (6): 665–681.
   Web of Science ®Google Scholar
• Newman, E.A. 2019. Disturbance ecology in the Anthropocene. Frontiers in Ecology and Evolution 7: 147.
   Web of Science ®Google Scholar
• O’Connor, T.G. 1991. Local extinction in perennial grasslands: a life-history approach. The American Naturalist 137 (6): 753–773.
   Web of Science ®Google Scholar
• O’Connor, T.G. 2004. Influence of land use on populations of the medicinal plant Alepidea amatymbica in the southern Drakensberg. South African Journal of Botany 70 (2): 319–322.
   Web of Science ®Google Scholar
• O’Connor, T.G. 2005. Influence of land use on plant community composition and diversity in Highland Sourveld grassland in the southern Drakensberg, South Africa. Journal of Applied Ecology 42 (5): 975–988.
   Web of Science ®Google Scholar
• O’Connor, T.G. & Kuyler, P. 2009. Impact of land use on the biodiversity integrity of the moist sub-biome of the grassland biome, South Africa. Journal of Environmental Management 90 (1): 384–395.
   PubMed Web of Science ®Google Scholar
• O’Connor, T.G., Martindale, G., Morris, C.D., Short, A.D., Witkowski, E.T.F. & Scott-Shaw, R.C. 2011. Influence of grazing management on plant diversity of highland sourveld grassland, KwaZulu-Natal, South Africa. Rangeland Ecology and Management 64 (2): 196–207.
   Web of Science ®Google Scholar
• O’Connor, T.G., Puttick, J.R. & Hoffman, M.T. 2014. Bush encroachment in southern Africa: changes and causes. African Journal of Range and Forage Science 31 (2): 67–88.
   Web of Science ®Google Scholar
• Parker, A.G., Lee-Thorp, J. & Mitchell, P.J. 2011. Late Holocene neoglacial conditions from the Lesotho highlands, southern Africa: phytolith and stable carbon isotope evidence from the archaeological site of Likoaeng. Proceedings of the Geologists’ Association 122 (1): 201–211.
   Web of Science ®Google Scholar
• Peden, M. 2005. Tackling ‘the most avoided issue’: communal rangeland management in KwaZulu-Natal, South Africa. African Journal of Range and Forage Science 22 (3): 167–175.
   Google Scholar
• Pickett, S.T.A. & White, P.S. (Eds.). 1985. The Ecology of Natural Disturbance and Patch Dynamics. New York, Academic Press.
   Google Scholar
• Pickett, S.T. & White, P.S. 2013. The Ecology of Natural Disturbance and Patch Dynamics. San Diego, Academic Press.
   Google Scholar
• Pörtner, H., et al. 2021. IPBES-IPCC Co-Sponsored Workshop Report on Biodiversity and Climate Change. Tech. Rep. IPBES and IPCC.
   Google Scholar
• Ramos-Neto, M.B. & Pivello, V.R. 2000. Lightning fires in a Brazilian savanna national park: rethinking management strategies. Environmental management 26 (6): 675–684.
   PubMed Web of Science ®Google Scholar
• Rankin, E. & Schneider, R.M. 2020. Report from Retief at Blydevooruitsig (11 November 1837). From Memory to Marble. Berlin, De Gruyter.
   Google Scholar
• Riginos, C. 2009. Grass competition suppresses savanna tree growth across multiple demographic stages. Ecology 90 (2): 335–340.
   PubMed Web of Science ®Google Scholar
• Roberts, P., Lee-Thorp, J.A., Mitchell, P.J. & Arthur, C. 2013. Stable carbon isotopic evidence for climate change across the late Pleistocene to early Holocene from Lesotho, southern Africa. Journal of Quaternary Science 28 (4): 360–369.
   Web of Science ®Google Scholar
• Rowe-Rowe, D. & Scotcher, J. 1986. Ecological carrying capacity of the Natal Drakensberg for wild ungulates. South African Journal of Wildlife Research 16 (1): 12–16.
   Google Scholar
• Sage, R.F. 2020. Global change biology: a primer. Global Change Biology 26 (1): 3–30.
   PubMed Web of Science ®Google Scholar
• Salomon, M.L. 2011. Keeping cattle in a changing rural landscape: communal rangeland management in Okhombe, KwaZulu-Natal, South Africa. PhD thesis, Centre of Environment, Agriculture, and Development, University of KwaZulu-Natal, Pietermaritzburg.
   Google Scholar
• Scotcher, J. 1982. Interrelations of vegetation and eland (Taurotragus oryx Pallas) in Giant’s Castle Game Reserve. PhD thesis, University of Natal, School of Zoological Sciences, Durban.
   Google Scholar
• Smith, F.R. & Granger, J.E. 2017. Survival and life expectancy of the tree Protea roupelliae subsp. roupelliae in a montane grassland savanna: effects of fire regime and plant structure. Austral Ecology 42 (4): 422–432.
   Web of Science ®Google Scholar
• Statistics South Africa. 2016. Provincial Profile: KwaZulu-Natal Community Survey 2016. Tech. Rep., Report number 03-01-10. Pretoria, STATS SA.
   Google Scholar
• Stewart, B.A., Dewar, G.I., Morley, M.W., Inglis, R.H., Wheeler, M., Jacobs, Z. & Roberts, R.G. 2012. Afromontane foragers of the Late Pleistocene: site formation, chronology and occupational pulsing at Melikane Rockshelter, Lesotho. Quaternary International 270: 40–60.
   Web of Science ®Google Scholar
• Tainton, N.M. (Ed.). 1999. Veld Management in South Africa. Pietermaritzburg, University of Natal Press.
   Google Scholar
• Tapson, D. 1993. Biological sustainability in pastoral systems: the KwaZulu case. In Behnke, R., Scoones, I. & Kerven, C. (Eds.) Range Ecology at Disequilibrium: New Models of Natural Variability and Pastoral Adaptation in African Savannas. London, Overseas Development Institute. pp. 118–135.
   Google Scholar
• Turner, D.P. 2007. Soils of KwaZulu-Natal and Mpumalanga: recognition of natural soil bodies. PhD thesis, University of Pretoria, Department of Plant Production and Soil Science. Pretoria.
   Google Scholar
• Tyson, P.D., Preston-Whyte, R.A. & Schulze, R.E. 1976. The climate of the Drakensberg. Vol. 31. Pietermaritzburg, Town and Regional Planning Commission.
   Google Scholar
• van Schalkwyk, G. 2017. Drakensberg Passes: An Historical Account of the Origins of Natal’s Drakensberg Passes. Pietermaritzburg, Gillis van Schalkwyk.
   Google Scholar
• van Wilgen, B.W., Measey, J., Richardson, D.M., Wilson, J.R. & Zengeya, T.A. (Eds.). 2020. Biological Invasions in South Africa. Cham, Springer Nature.
   Google Scholar
• Whelan, D. 2019. Water, settlement and food provision in Natal colony: the Winterton irrigation settlement, 1902–1904. Historia 64 (1): 42–64.
   Google Scholar
• Wichura, H., Bousquet, R., Oberhänsli, R., Strecker, M.R. & Trauth, M.H. 2010. Evidence for middle Miocene uplift of the East African Plateau. Geology 38 (6): 543–546.
   Web of Science ®Google Scholar
• Williams, V., Victor, J. & Crouch, N. 2013. Red listed medicinal plants of South Africa: status, trends, and assessment challenges. South African Journal of Botany 86: 23–35.
   Web of Science ®Google Scholar
• Wright, J.B. & Mazel, A.D. 2007. Tracks in a Mountain Range: Exploring the History of the uKhahlamba-Drakensberg. Johannesburg, Witwatersrand University Press.
   Google Scholar
• Zurlini, G., Riitters, K., Zaccarelli, N., Petrosillo, I., Jones, K.B. & Rossi, L. 2006. Disturbance patterns in a socio-ecological system at multiple scales. Ecological Complexity 3 (2): 119–128.
   Web of Science ®Google Scholar