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Minimum temperatures and frost at Grootfontein in the eastern Karoo, South Africa, over 98 years

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References

  • Abatzoglou, J.T. & Kolden, C.A. 2011. Fire and Invasive Plants Special Feature Climate Change in Western US Deserts: Potential for increased wildfire and invasive annual grasses. Rangeland Ecology and Management 64: 471–478. doi: 10.2111/REM-D-09-00151.1
  • Alexander, L.V., Zhang, X., Peterson, T.C., Caesar, J., Gleason, B., Klein Tank, A.M.G., Haylock, M., Collins, D., Trewin, B., Rahimzadeh, F., Tagipour, A., Rupa Kumar, K., Revadekar, J., Griffiths, G., Vincent, L., Stephenson, D.B., Burn, J., Aguilar, E., Brunet, M., Taylor, M., New, M., Zhai, P., Rusticucci, M. & Vazquez-Aguirre, J.L. 2006. Global observed changes in daily climate extremes of temperature and precipitation. Journal of Geophysical Research Atmospheres 111: 1–22.
  • Andrews, C.J. 1996. How do plants survive ice? Annals of Botany 78: 529–536. doi: 10.1006/anbo.1996.0157
  • Bath, D.F. 1975. Diseases caused by organic poisons: urea, acidosis, phosphate. Wool Production. Leaflet E 6.4/1975: 1–4.
  • Bosman, F.H. 1942. Spineless Cactus. Farming in South Africa 17 665–667.
  • Caroprese, M. 2008. Sheep housing and welfare. Small Ruminant Research 76: 21–25. doi: 10.1016/j.smallrumres.2007.12.015
  • Cleveland, W.S. 1979. Robust locally weighted regression and smoothing scatterplots. Journal of the American Statistical Association 74: 829–836. doi: 10.1080/01621459.1979.10481038
  • Cronje, P.B. 1992. Differences in nitrogen and urea metabolism between goats bred for fibre production (Angora goat) or meat production (Boer goat). South African Journal of Animal Science 22: 149–153.
  • Donaldson, C.H. 1989. Seedling survival and dryland production potential of grasses and shrubs during the establishment period. Karoo Agric 4: 3–10.
  • du Toit, J.C.O. & O’Connor, T.G. 2014. Changes in rainfall pattern in the eastern Karoo, South Africa, over the past 123 years. Water SA 40: 453–460. doi: 10.4314/wsa.v40i3.8
  • du Toit, J.C.O., O’Connor, T.G. & den Berg, L. 2015. Photographic evidence of fire-induced shifts from dwarf-shrub-to grass-dominated vegetation in Nama-Karoo. South African Journal of Botany 101: 148–152. doi: 10.1016/j.sajb.2015.06.002
  • Duker, R., Cowling, R.M., du Preez, D.R. & Potts, A.J. 2015a. Frost, Portulacaria afra Jacq., and the boundary between the Albany Subtropical Thicket and Nama-Karoo biomes. South African Journal of Botany 101: 112–119. doi: 10.1016/j.sajb.2015.05.004
  • Duker, R., Cowling, R.M., Du Preez, D.R., van der Vyver, M.L., Weatherall-Thomas, C.R. & Potts, A.J. 2015b. Community-level assessment of freezing tolerance: Frost dictates the biome boundary between Albany subtropical thicket and Nama-Karoo in South Africa. Journal of Biogeography 42: 167–178. doi: 10.1111/jbi.12415
  • Easterling, D.R., Horton, B., Jones, P.D., Peterson, T.C., Karl, T.R., Parker, D.E., Salinger, M.J., Razuvayev, V., Plummer, N., Jamason, P. & Folland, C.K. 1997. Maximum and Minimum Temperature Trends for the Globe. Science 277: 364–367. doi: 10.1126/science.277.5324.364
  • Erasmus, D., Phillips, L., Joubert, R., Burgess, M. & Coleman, A. 2012. First snowfalls of the season. Farmer’s Weekly 18 June, http://www.farmersweekly.co.za/news.aspx?id=23888&h=First-snowfalls-of-the-season.
  • Gelcer, E., Fraisse, C., Dzotsi, K., Hu, Z., Mendes, R. & Zotarelli, L. 2013. Effects of El Niño Southern Oscillation on the space–time variability of Agricultural Reference Index for Drought in midlatitudes. Agricultural and Forest Meteorology 174: 110–128. doi: 10.1016/j.agrformet.2013.02.006
  • Henschel, J.R. 2015. Locust times – monitoring populations and outbreak controls in relation to Karoo natural capital. Transactions of the Royal Society of South Africa 70: 135–143. doi: 10.1080/0035919X.2015.1046974
  • Hetem, R.S., de Witt, B.A., Fick, L.G., Fuller, A., Kerley, G.I.H., Maloney, S.K., Meyer, L.C.R. & Mitchell, D. 2009. Shearing at the end of summer affects body temperature of free-living Angora goats (Capra aegagrus) more than does shearing at the end of winter. Animal 3: 1025–1036. doi: 10.1017/S1751731109004364
  • Joubert, J. 1988. Fighting small stock diseases after rains. Karoo Regional Newsletter 1: 1–2.
  • Kane, R.P. 2009. Periodicities, ENSO effects and trends of some South African rainfall series: an update. South African Journal of Science 105: 199–207.
  • Kratsch, H.A. & Wise, R.R. 2000. The ultrastructure of chilling stress. Plant, Cell and Environment 23: 337–350. doi: 10.1046/j.1365-3040.2000.00560.x
  • Kruger, A.C. & Shongwe, S. 2004. Temperature trends in South Africa: 1960–2003. International Journal of Climatology 24: 1929–1945. doi: 10.1002/joc.1096
  • MacKellar, N., New, M. & Jack, C. 2014. Observed and modelled trends in rainfall and temperature for South Africa: 1960–2010. South African Journal of Science 110: 51–63. doi: 10.1590/sajs.2014/20130353
  • Morignat, E., Gay, E., Vinard, J.L., Calavas, D. & Hènaux, V. 2015. Quantifying the influence of ambient temperature on dairy and beef cattle mortality in France from a time-series analysis. Environmental Research 140: 524–534. doi: 10.1016/j.envres.2015.05.001
  • Mucina, L., Rutherford, M.C., Palmer, A.R., Milton, S.J., Scott, L., Lloyd, J.W., der Merwe, B., Hoare, D.B., Bezuidenhout, H., Vlok, J.H.J., Euston-Brown, D.I.W., Powrie, L.W. & Dold, A.P. 2006. Nama-Karoo biome. In L. Mucina & M.C. Rutherford (Eds), The Vegetation of South Africa, Lesotho and Swaziland. Pretoria, SANBI, pp. 324–347.
  • Muller, K., O’Connor, T.G. & Henschel, J.R. 2016. Impact of a severe frost event in 2014 on woody vegetation within the Nama-Karoo and semi-arid savanna biomes of South Africa. Journal of Arid Environments 133: 112–121. doi: 10.1016/j.jaridenv.2016.06.010
  • New, M., Hewitson, B., Stephenson, D.B., Tsiga, A., Kruger, A., Manhique, A., Gomez, B., Coelho, C.A.S., Masisi, D.N., Kululanga, E., Mbambalala, E., Adesina, F., Saleh, H., Kanyanga, J., Adosi, J., Bulane, L., Fortunata, L., Mdoka, M.L., Lajoie, R., Town, C., Town, C., Africa, S. & Town, C. 2006. Evidence of trends in daily climate extremes over southern and west Africa. Journal of Geophysical Research 111: 1–11. doi: 10.1029/2005JD006289
  • Nicholson, S.E. 2001. Climatic and environmental change in Africa during the last two centuries. Climate Research 17: 123–144. doi: 10.3354/cr017123
  • Peltier, J. 2016. LOESS Utility for Excel. Peltier Tech Blog. (http://peltiertech.com/loess-utility-for-excel/) [accessed 9 September 2015].
  • Prentice, I.C., Cramer, W., Harrison, S.P., Leemans, R., Monserud, R.A. & Solomon, A.M. 1992. Special paper: a global biome model based on plant physiology and dominance, soil properties and climate. Journal of Biogeography 19: 117–134. doi: 10.2307/2845499
  • Rao, M.P., Davi, N.K., D’arrigo, R.D., Skees, J., Nachin, B., Leland, C., Lyon, B., Wang, S.-Y. & Byambasuren, O. 2015. Dzuds, droughts, and livestock mortality in Mongolia. Environmental Research Letters 10: 074012. doi: 10.1088/1748-9326/10/7/074012
  • Read, J. & Hill, R.S. 1989. The response of some Australian temperate rain forest tree species to freezing temperatures and its biogeographical significance. Journal of Biogeography 16: 21–27. doi: 10.2307/2845308
  • Rowswell, D.I. 1985. Weather related danger regions in the Angora Groat Industry. Karoo Agric 3: 10–16.
  • Rutherford, M.C., Powrie, L.W. & Schulze, R.E. 1999. Climate change in conservation areas of South Africa and its potential impact on floristic composition: a first assessment. Diversity and Distributions 5: 253–262. doi: 10.1046/j.1472-4642.1999.00061.x
  • Rutherford, M.C., Mucina, L. & Powrie, L.W. 2006. Biomes and bioregions of southern Africa. The vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19: 30–51.
  • Sakai, A. 1965. Survival of plant tissue at super-low temperature III. Relation between effective prefreezing temperatures and the degree of front hardiness. Plant Physiology 40: 882. doi: 10.1104/pp.40.5.882
  • Sakai, A. & Wardle, P. 1978. Freezing resistance of New Zealand trees and shrubs. New Zealand Journal of Ecology 1: 51–61.
  • Sklenárˇ, P., Kučerová, A., Macek, P. & Macková, J. 2012. The frost-resistance mechanism in páramo plants is related to geographic origin. New Zealand Journal of Botany 50: 391–400. doi: 10.1080/0028825X.2012.706225
  • Snyman, H.A. 2004. Short-term response in productivity following an unplanned fire in a semi-arid rangeland of South Africa. Journal of Arid Environments 56: 465–485. doi: 10.1016/S0140-1963(03)00069-7
  • Snyman, M. & van Heerden, M. 2011. Can protective coats alleviate the effect of cold, wet and windy conditions on Angora goats? Groot Agric 11: 1–18.
  • Software Systat Inc. 2001. Sigmaplot for Windows, version 7.0s, San Jose, CA, USA.
  • Statpoint Technologies Inc. 2009. Statgraphics Centurion X version 16:17, Warrenton, VA, USA.
  • van Laer, E., Moons, C., Ampe, B., Sonck, B., Vangeyte, J. & Tuyttens, F. 2015. Summertime use of natural versus artificial shelter by cattle in nature reserves. Animal Welfare 24: 345–356. doi: 10.7120/09627286.24.3.345
  • van Wilgen, N.J., Goodall, V., Holness, S., Chown, S.L. & McGeoch, M.A. 2015. Rising temperatures and changing rainfall patterns in South Africa’s national parks. International Journal of Climatology 36: 706–721. doi: 10.1002/joc.4377
  • Wentzel, D. 1989. Practical measures for the control of coccidiosis in Angora goats. Angora Goat and Mohair Journal 31: 1–4.
  • Woodward, F.I., Lomas, M.R. & Kelly, C.K. 2004. Global climate and the distribution of plant biomes. Philosophical Transactions of the Royal Society B: Biological Sciences 359: 1465–1476. doi: 10.1098/rstb.2004.1525

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