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Plant species richness and composition a long livestock grazing intensity gradients in a Namaqualand (South Africa) protected area

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Abstract

The study described changes in floristic and vegetation structure in relation to livestock grazing intensity in a conservation area in the Succulent Karoo, South Africa. Grazing by goats and sheep is allowed in the Richtersveld National Park (a contractual National Park. which is also an area of high floristic richness and endemism. We used goat faecal pellet density, degree of trampling and percentage bare-ground at distances from the stock posts as surrogates for a gradient in grazing pressure. A stock post is the place where farmers keep, in most cases in an enclosure called a ‘kraal’, their animals at night and to which they return every evening after the day’s herding. Twenty-seven stock posts were located in the Richtersveld National Park; nine stock posts on flats, foot– slopes and mountain each. We measured plant species richness and diversity, and mean percentage cover of the various plant growth forms (including the number of species falling into each growth form category. in each of the five 10 m . 10 m plots (each 200 m apart. demarcated along a transect of one kilometre length from the centre of each stock post. The results showed that distance from the stock post does reflect grazing intensity use because densities in faecal pellets rapidly declined with increasing distances away from the stock post for all habitats studied. Faecal density was positively correlated with stocking density. Plant species richness and diversity was at a minimum near stock posts. Plants able to endure the effects of heavy grazing occurred near stock posts where declines in palatable plant species, assumingly sensitive to heavy grazing and trampling, were recorded. Grazing increased vegetation patchiness up to 800 m from the stock post for all the habitats. The degree to which this change in species composition occurred did not depend on stocking densities, suggesting that both grazing and landscape variability were responsible for vegetation changes in rangelands of that area of the Succulent Karoo biome.

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References

  • D.L. Barnes (1976) ArticleTitleA review of plant–based methods for estimating food consumption, percentage utilization, species preferences and feeding patterns of grazing and browsing animals Proceedings of the Grassland Society of Southern Africa 11 65–71

    Google Scholar 

  • G.N. Bastin G. Pickup V.H. Chewings G. Pearce (1993a) ArticleTitleLand degradation assessment in central Australia using a grazing gradient method Rangeland Journal 15 IssueID3 190–216

    Google Scholar 

  • G.N. Bastin A.D. Sparrow G. Pearce (1993b) ArticleTitleGrazing gradients in central Australian rangelands: ground verification of remote sensing–based approach Rangeland Journal. 15 IssueID2 217–233

    Google Scholar 

  • W.J. Bond (1999) Rangelands and biodiversity in southern Africa – impacts of contrasting management systems.. In: Eldridge D D. Freundenberger (Eds) People and Rangelands: buiding the future. Proceedings of the VI International Rangeland Congress Queensland Australia

    Google Scholar 

  • W.J. Bond P.G. Ladd (2001) ArticleTitleDynamics of the overstorey and species richness in Australian heathlands Journal of Mediterranean Ecology 2 247–257

    Google Scholar 

  • C. Bromilow (1995) Problem plants of South Africa Briza Publications Pretoria, South Africa

    Google Scholar 

  • S.L. Collins (1992) ArticleTitleHeterogeneity of disturbed tallgrass prairie communities Ecology 73 2001–2006

    Google Scholar 

  • R.T. Coupland (1992) Mixed prairie: ecosystems of the world R.T. Coupland (Eds) Natural grasslands: introduction and Western Hemisphere Elsevier New York, USA 151–182

    Google Scholar 

  • R.M. Cowling K.J. Esler P.W. Rundel (1999) ArticleTitleNamaqualand, South Africa –an overview of a unique winter–rainfall desert ecosystem Plant Ecology 142 3–21 Occurrence Handle10.1023/A:1009831308074

    Article  Google Scholar 

  • R.M. Cowling G.E. Gibbs Russel M.T. Hoffman C. Hilton–Tay–lor (1989) Patterns of plant species diversity in southern Africa.. In: Huntley B B.J. Huntley (Eds) Biotic diversity in Southern Africa Oxford University Press Cape Town, South Africa 19–50

    Google Scholar 

  • R.M. Cowling C. Hilton–Taylor (1994) ArticleTitlePatterns of plant diversity and endemism in southern Africa: an overview Strelitzia 1 31–52

    Google Scholar 

  • R.M. Cowling S.M. Pierce (1999) Namaqualand: a succulent desert Fernwood Press Vlaeberg, South Africa

    Google Scholar 

  • W.A.H. Ellis B.J. Sullivan A.T. Lisle F.N. Carrick (1998) ArticleTitleSpatial and temporal distribution of koala faecal pellets Wildlife Research. 25 663–668 Occurrence Handle10.1071/WR97028

    Article  Google Scholar 

  • K.J. Esler P.W. Rundel (1999) ArticleTitleComparative patterns of phenology and growth from diversity in two winter rainfall deserts: the Succulent Karoo and Mojave Desert ecosystems Plant Ecology 142 97–104 Occurrence Handle10.1023/A:1009830513525

    Article  Google Scholar 

  • K.J. Esler P.W. Rundel R.M. Cowling (1999) The Succulent Karoo in a global context: plant structural and functional comparison with North American winter rainfall deserts W.R.J. Dean S.J. Milton (Eds) The Karoo: Ecological patterns and processes Cambridge University Press United Kingdom 257–273

    Google Scholar 

  • B.D. Foran G.N. Bastin K.A. Shaw (1986) ArticleTitleRange assessment and monitoring in arid lands: the use of classification and ordination in range survey Journal of Environmental Management 22 67–84

    Google Scholar 

  • R.D. Graetz J.A. Ludwig (1978) ArticleTitleA method for the analysis of piophere data applicable to range assessment Australian Rangeland Journal. 1 126–136

    Google Scholar 

  • H.H. Hendricks (1998) ArticleTitleTraditional stock farming in the Richtersveld Veld and Flora 84 IssueID3 86–87

    Google Scholar 

  • H.H. Hendricks P.A. Novellie J.J. Midgley (2002) ArticleTitleDiet selection of goats in the Richtersveld National Park African Journal of Range and Forage Science. 19 IssueID1 1–11

    Google Scholar 

  • Hendricks H.H., Bond W.J., Migley J.J. and Novellie P.A. 2003. On the move – mitigating the effect of rainfall variability on livestock production. African Journal of Range and Forage Science (submitted).

  • C. Hilton–Taylor (1996) Patterns and characteristics of the flora of the Succulent Karoo Biome, southern Africa L.J.E. Maesen Particlevan der X.M. Burgt Particlevan der J.M. Medenbachde Rooy (Eds) The biodiversity of African plants Kluwer Academic Publishers Dordrecht, The Netherlands 58–72

    Google Scholar 

  • M.T. Hoffman (1989) ArticleTitleA preliminary investigation of the phenology of subtropical thicket and karroid shrublands in the lower Sundays River Valley, SE Cape South African Journal of Botany 55 IssueID6 586–597

    Google Scholar 

  • MT Hoffman B Cousins T Meyer A Petersen HH. Hendricks (1999) Historical and contemporary land use and the desertification of the karoo W.R.J. Dean S.J. Milton (Eds) The Karoo: Ecological patterns and processes Cambridge University Press United Kingdom 257–273

    Google Scholar 

  • B.J. Huntley (1989) Biotic diversity in Southern Africa Oxford University Press Cape Town, South Africa

    Google Scholar 

  • C. James M. Stafford Smith J. Bosma J. Landsberg R. Tynan J. Maconochie (1999) Production, persistence, economic and extinction: integrating conservation and pastoralism in Australian rangelands.. In: Eldridge F D. Freudenberger (Eds) People and Rangelands: building the future Proceedings of the VI International Rangeland Congress Queensland, Australia

    Google Scholar 

  • N. Jürgens I.H. Gotzmann R.M. Cowling (1999) ArticleTitleRemarkable medium–term dynamics of leaf succulent Mesembryanthemaceae shrubs in the winter–rainfall desert of northwestern Namaqualand, South Africa Plant Ecology. 142 87–96 Occurrence Handle10.1023/A:1009862025821

    Article  Google Scholar 

  • InstitutionalAuthorNameLand Type Survey Staff (1987) Land types of the maps Alexander Bay 2816, 2818 Warmbad, 2916 Springbok, 2918 Pofadder, 3017 Garies, 3018 Loeriefontein Memoir of Agriculture and Natural Resource of South Africa Pretoria, South Africa

    Google Scholar 

  • R.T. Lange (1969) ArticleTitleThe piosphere: sheep track and dung patterns Journal of Range Management 22 396–400

    Google Scholar 

  • J. Landsberg C.D. James S. Morton T.J. Hobbs J. Stol A. Drew H. Tongway (1997) The effects of artificial sources of water on rangeland biodiversity. Final report to the Biodiversity Convention and Strategy Section of the Biodiversity Group, Environment Australia CSIRO Canberra

    Google Scholar 

  • D.G. Milchunas W.K. Lauenroth (1993) ArticleTitleQuantitative effects of grazing on vegetation and soils over a global range of environments Ecological Monographs. 63 327–366

    Google Scholar 

  • S.J. Milton (1991) ArticleTitlePlant spinescence in arid southern Africa: does moisture mediate selection by mammals? Oecologia 87 279–287 Occurrence Handle10.1007/BF00325267

    Article  Google Scholar 

  • S.J. Milton W.R.J. Dean J. Settele D. Vetterlein (1998) Effects of physical refuges and human activities on plant population dynamics and bird assemblages in the Richtersveld National Park Pp8. Unpublished technical report, Scientific Services South African National Parks Kimberley

    Google Scholar 

  • S.J. Milton M.T. Hoffman (1994) ArticleTitleThe application of state–and–transition models to arid rangeland research and management in arid succulent and semi–arid grassy Karoo, South Africa African Journal of Range and Forage Science 11 18–26

    Google Scholar 

  • S.J. Milton R.I. Yeaton W.R.J. Dean J.H.J. Vlok (1997) Succulent Karoopp R.M. Cowling D.M. Richardson S.M. Pierce (Eds) The vegetation of Southern Africa Cambridge University Press Cambridge, UK 131–166

    Google Scholar 

  • T.G. O’Connor P.W. Roux (1995) ArticleTitleVegetation changes (1949–71. in a semi–arid, grassy dwarf shrubland in the Karoo, South Africa: influence of rainfall variability and grazing by sheep Journal of Applied Ecology 32 612–626

    Google Scholar 

  • J. Oskanen (1996) ArticleTitleIs the hump relationship between species richness and biomass an artifact due to plot size? Journal of Ecology 84 293–295

    Google Scholar 

  • N. Owen–Smith (1999) The animal factor in veld management N.M. Tainton (Eds) Veld management in South Africa (ed N.M..) Second edition University of Natal Press Pietermaritzburg South Africa 117–138

    Google Scholar 

  • R.K. Peet (1974) ArticleTitleThe measurement of species diversity Annual Review of Ecology and Systematics. 5 285–307 Occurrence Handle10.1146/annurev.es.05.110174.001441

    Article  Google Scholar 

  • G. Pickup (1989) ArticleTitleNew land degradation survey techniques for arid Australia: problems and prospects Australian Rangeland Journa. 11 74–82

    Google Scholar 

  • M.E. Ritchie H. Olff (1999) Herbivore diversity and plant dynamics: compensatory and additive effects H. Olff V.K. Brown R.T. Drent (Eds) Herbivores: between plants and predators Blackwell Science London, UK 175–204

    Google Scholar 

  • B. Rossa D.J. Willert Particlevon (1999) ArticleTitlePhysiological characteristics of geophytes in semiarid Namaqualand, South Africa Plant Ecology 142 121–132 Occurrence Handle10.1023/A:1009870227638

    Article  Google Scholar 

  • P.W. Roux M. Vorster (1983) ArticleTitleVegetation change in the Karoo Proceedings of the Grassland Society of Southern Africa 18 18–24

    Google Scholar 

  • M.C. Rutherford R.M. Westfall (1986) ArticleTitleBiomes of southern Africa – an objective categorization Memoirs of the Botanical Survey of South Africa 54 1–98

    Google Scholar 

  • D.W. Schwilk J.E. Keeley W.J. Bond (1997) ArticleTitleThe intermediate disturbance hypothesis does not explain fire and diversity patterns in fynbos Plant Ecology 132 77–84 Occurrence Handle10.1023/A:1009755320731

    Article  Google Scholar 

  • MHH Stevens WP Carson (1999) ArticleTitlePlant density determines species richness along an experimental fertility gradient Ecology 80 IssueID2 455–465

    Google Scholar 

  • Stokes C.J. 1994. Degradation and dynamics of Succulent Karoo vegetation. MSc. thesis. University of Natal, South Africa.

  • L.W. Swift (1976) ArticleTitleAlgorithm for solar radiation on mountain slopes Water Resources Research. 12 108–112

    Google Scholar 

  • N.M. Tainton (1981) The ecology of the main grazing lands of South Africa: production characteristics of the main grazing lands N. Tainton (Eds) Veld and Pasture Management in South Africa Shuter and Shooter in association with Natal University Press Pietermaritzburg, South Africa 25–56

    Google Scholar 

  • N.M. Tainton (1999) The ecology of the main grazing lands of South Africa N.M. tainton (Eds) Veld management in South Africa. Second edition University of Natal Press Pietermaritzburg, South Africa 23–53

    Google Scholar 

  • S. Todd M.T. Hoffman (1999) ArticleTitleEffects of heavy grazing on plant species diversity and community composition in a communally managed semi–arid shrubland, Namaqualand, South Africa Plant Ecology 142 169–178 Occurrence Handle10.1023/A:1009810008982

    Article  Google Scholar 

  • R. Tynan J. Maconochie C. James J. Landsberg D. Tongway (1999) Grazing gradients, biodiversity and landscape function in Australian rangelands D. Eldridge D. Freudenberger (Eds) People and Rangelands: building the future Proceedings of the VI International Rangeland Congress Queensland, Australia

    Google Scholar 

  • F. Vander Heyden W.D. Stock (1999) The response of forage plants to defoliation: karoo shrubs N.M. Tainton (Eds) Veld management in South Africa. Second edition University of Natal Press Pietermaritzburg South Africa 103–109

    Google Scholar 

  • N. Rooyen Particlevan D.J. Rensburg G.K. Theron P. Bothma Du (1990) ArticleTitleMonitoring of the vegetation around artificial watering points (windmills) in the Kalahari Gemsbok National Park Koedoe 33 63–88

    Google Scholar 

  • D.J. Willert Particlevon B.M. Eller M.J.A. Werger E. Brinckmann H.–D. Ihenfeldt (1992) Life strategies of succulents in deserts: with special reference to the Namib Desert Cambridge University Press Cambridge UK

    Google Scholar 

  • M.J.A. Werger R.P. Ellis (1981) ArticleTitlePhotosynthetic pathways in the arid regions of South Africa Flora 171 64–75

    Google Scholar 

  • M. Westoby (1980) ArticleTitleElements of a theory of vegetation dynamics in arid rangelands Israel Journal of Botany 28 169–194

    Google Scholar 

  • R.H. Whittaker (1980) Classification of plant communities Dr W. Junk bv Publishers The Hague, London, UK.

    Google Scholar 

  • T. Wiegand S.J. Milton (1996) ArticleTitleVegetation change in semi–arid communities Vegetatio 125 169–183 Occurrence Handle10.1007/BF00044649

    Article  Google Scholar 

  • A.D. Wilson (1986) The monitoring of changes in range condition: a multivariate site potential approach In: Rangelands: a resource under siege Proceedings of the IX International Rangeland Congress, Australian Academy of Science Canberra, Australia 517–521

    Google Scholar 

  • RI Yeaton KJ. Esler (1990) ArticleTitleThe dynamics of succulent karoo vegetation:a study of species association and recruitment Vegetatio 88 103–113 Occurrence Handle10.1007/BF00044827

    Article  Google Scholar 

  • J.H. Zar (1984) Biostatistical Analysis Prentice–Hall. New Jersey USA

    Google Scholar 

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Authors and Affiliations

  1. South African National Parks, PO Box 110040, Hadison Park, 8306, South Africa

    H. H. Hendricks

  2. Botany Department, University of Cape Town, Private Bag, Rondebosch, 7701, South Africa

    W. J. Bond & J. J. Midgley

  3. South African National Parks, 787, Pretoria, 0001, South Africa

    P. A. Novellie

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  1. H. H. Hendricks
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  2. W. J. Bond
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  3. J. J. Midgley
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  4. P. A. Novellie
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Hendricks, H.H., Bond, W.J., Midgley, J.J. et al. Plant species richness and composition a long livestock grazing intensity gradients in a Namaqualand (South Africa) protected area. Plant Ecol 176, 19–33 (2005). https://doi.org/10.1007/s11258-003-0009-6

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