Climatic Change

, Volume 19, Issue 1–2, pp 65–78 | Cite as

History of climate and forests in tropical Africa during the last 8 million years

  • A. C. Hamilton
  • D. Taylor
Article

Abstract

There have been major changes in climate and in the composition and distribution of forest during the last 8 Myr. During the last world glacial maximum (peak 18 000 yr B.P.) the climate was dry and cold and forest much reduced and fragmented. The last glacial period as a whole (12000–70000 B.P.) was dry in tropical Africa and so too were most of the other 20 major ice ages which have occurred since 2.43 Myr B.P., in comparison with intervening interglacials. The extent of forest must have oscillated greatly. There has been a general drying in climate since 8 Myr.

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References

  1. AETFAT (L'Association pour l'étude Taxonomique de la Flore d'Afrique Tropicale): 1959, Vegetation Map of Africa South of the Tropic of Cancer (1:10 000 000) with Explanatory Notes by R. W. J. Keay, Oxford Univ. Press, Oxford.Google Scholar
  2. Agwu, C. D. C. and Beug, H.-J.: 1984, ‘Palynologische Untersuchungen an marinen Sedimenten vor der Westafrikanischen Küste’, Palaeoecol. Afr. 16, 37–52.Google Scholar
  3. Assémien, P., Filleron, J. C., Martin, L. and Tastet, J. P.: 1970, ‘Le Quaternaire de la zone littorale de Côte d'Ivoire’, Bull. Asequa 25, 65–78.Google Scholar
  4. Bonnefille, R.: 1976, ‘Palynological Evidence for an Important Change in the Vegetation of the Omo Basin between 2.5 and 2 Million Years Ago’, in Y. Coppens, F. C. Howell, G. L. Isaac, and R. E. F. Leakey (eds.), Earliest Man and Environments in the Lake Rudolf Basin. University of Chicago Press, Chicago, pp. 421–431.Google Scholar
  5. Bonnefille, R.: 1979, ‘Méthode palynologique et reconstitutions paléoclimatiques au Cénozoique dans le Rift Est Africain’, Bull. Soc. géol. France 21, 331–342.Google Scholar
  6. Bonnefille, R.: 1983, ‘Evidence for a Cooler and Drier Climate in the Ethiopian Uplands towards 2.5 Myr Ago’, Nature, Lond. 303, 487–491.Google Scholar
  7. Bonnefille, R.: 1984, ‘The Evolutions of the East African Environment’, in R. O. Whyte (ed.), The Evolution of the East Asian Environment, Vol. II, Centre for Asian Studies, Univ. Hongkong, Hongkong, pp. 579–612.Google Scholar
  8. Bonnefille, R. and Letouzey, R.: 1976, ‘Fruits fossiles d'Antrocaryon dans la vallée de l'Omo (Ethiopie)’, Adansonia 16, 65–82.Google Scholar
  9. Bonnefille, R. and Riollet, G.: 1988, ‘The Kashiru Sequence (Burundi): Palaeoclimatic Implications for the Last 40 000 yr BP in Tropical Africa’, Quaternary Research 30, 19–35.Google Scholar
  10. Bonnefille, R., Vincens, A., and Bucket, G.: 1987, ‘Palynology, Stratigraphy and Palaeoenvironment of a Pliocene Hominid Site (2.9–3.3 M.Y.) at Hadar, Ethiopia’, Palaeogeogr. Palaeoclimatol. Palaeoecol. 60, 249–281.Google Scholar
  11. Butzer, K. W., Isaac, G. L., Richardson, J.L., and Washbourn-Kamau, C. K.: 1972, ‘Radiocarbon Dating of East African Lake Levels’, Science, NY 175, 1069–1076.Google Scholar
  12. Coetzee, J. A.: 1967, ‘Pollen Analytical Studies in East and Southern Africa’, Palaeoecol. Afr. 3, 1–146.Google Scholar
  13. Coope, G. R. and Angus, R. B.: 1975, ‘An Ecological Study of a Temperate Interlude in the Middle of the Last Glaciation Based on Fossil Coleoptera from Isleworth, Middlesex’, J. Anim. Ecol. 44, 365–391.Google Scholar
  14. Coope, G. R., Morgan, A., and Osborne, P. J.: 1971, ‘Fossil Coleoptera as Indicators of Climatic Fluctuations during the Last Glaciation in Britain’, Palaeogeogr. Palaeoclimatol. Palaeoecol. 10, 87–101.Google Scholar
  15. Dechamps, R. and Maes, F.: 1985, ‘Essai de reconstitution des climats et des végétations de la basse vallée de l'Omo au Plio-Pleistocene à l'aide de bois fossiles’, in M. M. Boden et al. (eds.), L'environnement des hominidés au Plio-Pléistocène, Masson, Paris, pp. 175–222.Google Scholar
  16. Fredoux, A. and Tastet, J. P.: 1976, Apport de la palynologie à la connaissance paléogéographique du littoral ivoirien entre 8000 et 12 000 ans BP’, 7th Afr. Micropalaeontol. Colloq., IIe-Ife, Nigeria.Google Scholar
  17. Gasse, F., Rognon, R., and Street, F. A.: 1980, ‘Quaternary History of the Afar and Ethiopian Rift Lakes’, in M. A. J. Williams and H. Faure (eds.), The Sahara and the Nile, Balkema, Rotterdam, pp. 361–400.Google Scholar
  18. Gasse, F. and Street, F. A.: 1978, ‘Late Quaternary Lake-Level Fluctuations and Environments of the Northern Rift Valley and Afar Region (Ethiopia and Djibouti)’, Palaeogeogr. Palaeoclimatol. Palaeoecol. 24, 279–325.Google Scholar
  19. Gautier-Hion, A., Bourlière, F., Gautier, J.-P., and Kingdon, J.: 1988, A Primate Radiation: Evolutionary History of the African Guenons, Cambridge Univ. Press, Cambridge.Google Scholar
  20. Giresse, P. and Lanfranchi, R.: 1984, ‘Les climats et les océans de la région congolaise pendant l'Holocene. Bilans selon les échelles et les méthodes de l'observation’, Palaeoecol. Afr. 16, 77–88.Google Scholar
  21. Hamilton, A. C.: 1972, ‘The Interpretation of Pollen Diagrams from Highland Uganda’, Palaeoecol. Afr. 7, 45–149.Google Scholar
  22. Hamilton, A. C.: 1976, ‘The Significance of Patterns of Distribution Shown by Forest Plants and Animals in Tropical Africa for the Reconstruction of Upper Pleistocene Palaeoenvironments: A Review’, Palaeoecol. Afr. 9, 63–97.Google Scholar
  23. Hamilton, A. C.: 1982, Environmental History of East Africa, Academic Press, London.Google Scholar
  24. Hamilton, A. C.: 1987, ‘Vegetation and Climate of Mt Elgon during the Late Pleistocene and Holocene’, Palaeoecol. Afr. 18, 283–304.Google Scholar
  25. Hamilton, A. C. and Perrott, R. A.: 1978, ‘Date of Deglacierisation of Mount Elgon’, Nature, Lond. 273, 49.Google Scholar
  26. Hamilton, A. C. and Perrott, R. A.: 1979, ‘Aspects of the Glaciation of Mount Elgon’, Palaeoecol. Afr. 11, 153–161.Google Scholar
  27. Hamilton, A. C., Taylor, D., and Vogel, J. C.: 1986, ‘Early Forest Clearance and Environmental Degradation in South-West Uganda’, Nature, Lond. 320, 164–167.Google Scholar
  28. Hays, J. D., Imbrie, J., and Shackleton, N. J.: 1976, ‘Variations in the Earth's Orbit: Pacemaker of the Ice Ages’, Science, NY 194, 1121–1132.Google Scholar
  29. Hecky, R. E. and Degens, E. T.: 1973, Late Pleistocene-Holocene Chemical Stratigraphy and Paleolimnology of the Rift Valley Lakes of Central Africa, Tech. Rept. Woods Hole Oceanogr. Inst., Massachusetts.Google Scholar
  30. Hooghiemstra, H.: in press, ‘Changes of Major Wind Belts and Vegetation Zones in NW Africa 28 000-5000 yr BP, as Deduced from a Marine Pollen Record near Cap Blanc, Review of Palaeobotany and Palynology.Google Scholar
  31. Hsu, K. J., Montadert, L., Bernoulli, D., Cita, M. B., Erickson, A., Garrison, R. E., Kidd, R. B., Melières, F., Müller, C., and Wright, R.: 1977, ‘History of the Mediterranean Salinity Crisis’, Nature, Lond. 267, 399–403.Google Scholar
  32. Hurni, H.: 1981, ‘Simien Mountains-Ethiopia: Palaeoclimate of the Last Cold Period (Late Würm)’, Palaeoecol. Afr. 13, 127–137.Google Scholar
  33. Imbrie, J. and Imbrie, J. Z.: 1980, ‘Modeling the Climatic Response to Orbital Variations’, Science, NY 207, 943–953.Google Scholar
  34. Johansson, L. and Holmgren, K.: 1985, ‘Dating of a Moraine on Mount Kenya’, Geografiska Annaler 67A, 123–128.Google Scholar
  35. Kendall, R. L.: 1969, ‘An Ecological History of the Lake Victoria Basin’, Ecol. Monogr. 39, 121–176.Google Scholar
  36. Kingdon, J. S.: 1980, ‘The Role of Visual Signals and Face Patterns in African Forest Monkeys (Guenons) of the Genus Cercopithecus’, Trans. Zool. Soc. Lond. 35, 425–475.Google Scholar
  37. Kutzbach, J. E.: 1981, ‘Monsoon Climate of the Early Holocene: Climate Experiment with the Earth's Orbital Parameters for 9000 Years Ago, Science 214, 59–61.Google Scholar
  38. Kutzbach, J. E. and Guetter, P. J.: 1986, ‘The Influence of Changing Orbital Parameters and Surface Boundary Conditions on Climate Simulations for the Past 18 000 Years’, Journal of the Atmospheric Sciences 43, 1726–1759.Google Scholar
  39. Kutzbach, J. E. and Otto-Bliesner, B. L.: 1982, ‘The Sensitivity of the African-Asian Monsoonal Climate to Orbital Parameter Changes for 9000 Years B.P. in a Low-Resolution General Circulation Model’, Journal of the Atmospheric Sciences 39, 1177–1188.Google Scholar
  40. Kutzbach, J. E. and Street-Perrott, F. A.: 1985, ‘Milankovitch Forcing of Fluctuations in the Level of Tropical Lakes from 18 to 0 kyr BP’, Nature, Lond. 317, 130–134.Google Scholar
  41. Lezine, A.-M.: 1987, ‘Paléoenvironnements végétaux d'Afrique nord-tropicale depuis 12 000 B.P. Analyse pollinique de séries sédimentaires continentales (Sénégal-Mauritanie), thèse d'état, Université d'Aix - Marseille II, 2 Vols.Google Scholar
  42. Livingstone, D. A.: 1962, ‘Age of Deglaciation on the Ruwenzori Range, Uganda’, Nature, Lond. 194, 859–860.Google Scholar
  43. Livingstone, D. A.: 1967, ‘Postglacial Vegetation of the Ruwenzori Mountains in Equatorial Africa’, Ecol. Monogr. 37, 25–52.Google Scholar
  44. Livingstone, D. A.: 1975, ‘Late Quaternary Climatic Change in Africa’, Ann. Rev. Ecol. Syst. 6, 249–280.Google Scholar
  45. Livingstone, D. A.: 1980, ‘Environmental Changes in the Nile Headwaters’, in M. A. J. Williams and H. Faure (eds.), The Sahara and the Nile, Balkema, Rotterdam, pp. 339–359.Google Scholar
  46. Mahaney, W. C.: 1987, ‘Palaeoenvironmental Problems in the East African Mountains’, Palaeoecol. Afr. 18, 245–255.Google Scholar
  47. Mainguet, M., Canon, L., and Chemin, M. C.: 1980, ‘Le Sahara: géomorphologie et paléogéomorphologie écoliennes’, in M. A. J. Williams and H. Faure (eds.), The Sahara and the Nile, Balkema, Rotterdam, pp. 17–35.Google Scholar
  48. Maley, J.: 1987, ‘Fragmentation de la forêt dense humide africaine et extension des biotopes montagnards au Quaternaire récent: nouvelles données polliniques et chronologiques. Implications paléoclimatiques et biogéographiques’, Palaeoecol. Afr. 18, 307–334.Google Scholar
  49. Maley, J. and Livingstone, D. A.: 1983, ‘Extension d'un élément montagnard dans le sud du Ghana (Afrique de l'Ouest) au Pléistocène Supérieur et à l'Holocène inférieur: premières données polliniques’, C. R. Acad. Sc. Paris. Sér. II 296, 1287–1292.Google Scholar
  50. Médus, J.: 1984, ‘Essai de reconstitution de la végétation et du climat holocênes de la côte septentrionale du Sénégal’, Review of Palaeobotany and Palynology 41, 31–38.Google Scholar
  51. Mercer, J. H.: 1969, ‘The Allerod Oscillation: A European Climatic Anomoly?’, Arct. Alp. Res. 1, 227–234.Google Scholar
  52. Morrison, M. E. S.: 1968, ‘Vegetation and Climate in the Uplands of South-Western Uganda during the Later Pleistocene Period, 1. Muchoya Swamp, Kigezi District’, J. Ecol. 56, 363–384.Google Scholar
  53. Perrott, R. A.: 1982, ‘A High Altitude Pollen Diagram from Mount Kenya: Its Implications for the History of Glaciation’, Palaoeocol. Afr. 14, 77–83.Google Scholar
  54. Perrott, R. A. and Street-Perrott, F. A.: 1982, ‘New Evidence for a Late Pleistocene Wet Phase in Northern Intertropical Africa’, Palaeoecol. Afr. 14, 57–83.Google Scholar
  55. Prell, W. L., Hutson, W. H., Williams, D. F., Bé, A. W. H., Geitzenauer, K., and Molfino, B.: 1980, ‘Surface Circulation of the Indian Ocean during the Last Glacial Maximum, Approximately 18 000 yr B.P.’, Quat. Res. 14, 309–336.Google Scholar
  56. Rea, D. K. and Schrader, H.: 1985, ‘Late Pliocene Onset of glaciation: Ice-Rafting and Diatom Stratigraphy of North Pacific DSDP Cores’, Palaeogeogr. Palaeoclimatol. Palaeoecol. 49, 313–325.Google Scholar
  57. Ritchards, K.: 1987, A Palynolgical Study of the Late Quaternary Vegetational History of Mboandong, a Lowland Lake in Cameroon, unpubl. M. Sc. thesis, Univ. Hull, U.K.Google Scholar
  58. Ritchie, J. C., Eyles, C. H., and Haynes, C. V.: 1985, ‘Sediment and Pollen Evidence for an Early to Mid-Holocene Humid Period in the Eastern Sahara’, Nature, Lond. 314, 352–355.Google Scholar
  59. Rossognol-Strick, M. and Duzer, D.: 1979, ‘West African Vegetation and Climate since 22 500 BP from Deep-Sea Cores’, Pollen Spores 21, 105–134.Google Scholar
  60. Rossognol-Strick, M., Nesteroff, W, Olive, P., and Vergnaud-Grazzini, C.: 1982, ‘After the Deluge: Mediterranean Stagnation and Sapropel Formation’, Nature, Lond. 295, 105–110.Google Scholar
  61. Sarnthein, M.: 1978, ‘Sand Deserts during Glacial Maximum and Climatic Optimum’, Nature, Lond. 272, 43–46.Google Scholar
  62. Sarnthein, M., Telzlaff, G., Koopmann, B., Wolter, K., and Pflaumann, U: 1981, ‘Glacial and Interglacial Wind Regimes over the Eastern Subtropical Atlantic and North-West Africa’, Nature, Lond. 293, 193–196.Google Scholar
  63. Servant, M. and Servant-Valdary, S.: 1980, ‘L'environnement quaternaire du bassin du Tchad’, in M. A. J. Williams and H. Faure (eds.), The Sahara and the Nile, Balkema, Rotterdam, pp. 133–162.Google Scholar
  64. Shackleton, N. J. and Opdyke, N. D.: 1973, ‘Oxygen Isotope and Paleomagnetic Stratigraphy of Equatorial Pacific Core V2–238: Oxygen Isotope Temperatures and Ice Volumes on a 105 and 106 Year Scale’, Quat. Res. 3, 39–55.Google Scholar
  65. Sowunmi, M. A.: 1981a, ‘Nigerian Vegetational History from the Late Quaternary to the Present Day’, Palaeoecol. Afr. 13, 217–234.Google Scholar
  66. Sowunmi, M. A.: 1981b, ‘Late Quaternary Environmental Changes in Nigeria’, Pollen Spores 23, 125–148.Google Scholar
  67. Sowunmi, M. A.: 1985, ‘The Beginnings of Agriculture in West Africa: Botanical Evidence’, Curr. Anthrop. 26, 127–129.Google Scholar
  68. Stein, R. and Sarnthein, M.: 1984, ‘Late Neogene Events of Atmospheric and Oceanic Circulation Offshore Northwest Africa: High Resolution Record from Deep-Sea Sediments’, Palaeoecol. Afr. 16, 9–36.Google Scholar
  69. Talbot, M. R.: 1980, ‘Environmental Responses to Climatic Change in the West African Sahel over the Past 20 000 Years’, in M. A. J. Williams and H. Faure (eds.), The Sahara and the Nile, Balkema, Rotterdam, pp. 37–62.Google Scholar
  70. Talbott, M. R.: 1983, ‘Lake Bosumtwi, Ghana’, Nyame Akuma 23, 11.Google Scholar
  71. Talbot, M. R. and Hall, J. B.: 1981, ‘Further Late Quaternary Leaf Fossils from Lake Bosumtwi, Ghana’, Palaeoecol. Afr. 13, 83–92.Google Scholar
  72. Talbot, M. R., Livingstone, D. A., Palmer, P. G., Maley, J., Melack, J. M., Delibrias, G., and Gulliksen, S.: 1984, ‘Preliminary Results from Sediment Cores from Lake Bosumtwi, Ghana’, Palaeoecol. Afr. 16, 173–192.Google Scholar
  73. Taylor, D. M.: 1988, The Environmental History of the Rukiga Highlands, South-West Uganda, during the Last 40 000 to 50 000 Years, unpubl. D. Phil. thesis, Univ. Ulster, UK.Google Scholar
  74. Tiercelin, J. J., Renaut, R. W., Delibrias, G., Le Fournier, J, and Bieda, S.: 1981, ‘Late Pleistocene and Holocene Lake Level Fluctuations in the Lake Bogoria Basin, Northern Kenya Rift Valley’, Palaeoecol. Afr. 13, 105–120.Google Scholar
  75. van Campo, E. Duplessy, J. C., and Rossignol-Strick, M.: 1982, ‘Climatic Conditions Deduced from 150-kyr Oxygen Isotope-Pollen Record from the Arabian Sea’, Nature, Lond. 296, 56–59.Google Scholar
  76. von Donk, J.: 1976, ‘An 18O Record of the Atlantic Ocean for the Entire Pleistocene’, Geol. Soc. Amer. Mem. 145, 147–264.Google Scholar
  77. van Zinderen Bakker, E. M. and Coetzee, J. A.: 1972, A Re-appraisal of Late-Quaternary Climatic Evidence from Tropical Africa’, Palaeoecol. Afr. 7, 151–191.Google Scholar
  78. Williamson, P. G.: 1985, ‘Evidence for an Early Plio-Pleistocene Rainforest Expansion in East Africa’, Nature, Lond. 315, 487–489.Google Scholar
  79. Yemane, K., Bonnefille, R., and Faure, H.: 1985, ‘Palaeoclimatic and Tectonic Implications of Neogene Microflora from the Northwestern Ethiopian Highlands’, Nature, Lond. 318, 653–656.Google Scholar

Copyright information

© Kluwer Academic Publishers 1991

Authors and Affiliations

  • A. C. Hamilton
    • 1
  • D. Taylor
    • 2
  1. 1.World Wide Fund for Nature, Panda HouseGodalmingU.K.
  2. 2.School of Geography and Earth Processes, University of HullHullU.K.

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