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Late Quaternary Vegetation and Climate of the Sahel

Published online by Cambridge University Press:  20 January 2017

Anne-Marie Lézine
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Abstract

Pollen and phytogeographic evidence provides a vegetational history of the Sahel for the period 0–18,000 yr B.P. The zonal vegetation fluctuated latitudinally and its most extreme positions occurred at 18,000 and 8500 yr B.P. The first involved a southward shift of the Sahelian wooded grassland to 10°N under the arid conditions of the last glacial maximum. The second change shows a rapid northward migration of humid vegetation: Guinean elements reach 16°N and Sahelo-Sudanian elements extend to the southern margin of the modern Sahara (21°N) when the Atlantic monsoon flux increased. In the middle Holocene the extensive spread of Sudanian elements into the modern Sahelian zone suggests the appearance of a markedly dry season. The modern Sahelian semiarid conditions appeared abruptly at 2000 yr B.P.

Type
Research Article
Information
Quaternary Research , Volume 32 , Issue 3 , November 1989 , pp. 317 - 334
Copyright
University of Washington

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References

Adam, J.G., (1948). Les reliques boisées et les essences des savanes dans la zone préforestière en Guinée française Bulletin de la société botanique de France 95, 1–2 22–26 Google Scholar
Assémien, P., (1971). Etude comparative des flores actuelles et quaternaires récentes de quelques paysages végétaux d'Afrique de L'Ouest Ph.D. dissertation University of Abidjan Google Scholar
Aubréville, A., (1939). Forêts reliques en Afrique occidentale française Revue de Botanique appliquée 479–484 Google Scholar
Aubréville, A., (1949). Climats, forêts et désertification de l'Afrique tropicale Société d'Edition de Géographie maritime et coloniale Paris Google Scholar
Aubréville, A., (1949). Contribution à la paléohistoire des forêts de l'Afrique tropicale Société d'Edition de Géographie maritime et coloniale Paris Google Scholar
Aubréville, A., (1950). Flore forestière soudanoguinéenne Société d'Edition de Géographie maritime et coloniale Paris Google Scholar
Baumhauer, R. Schulz, E., (1984). The holocene lake of Seguedine, Kaour, NE Niger Coetzee, J.A. Van Zinderen Bakker, E.M. Palaeoecology of Africa Vol. 16, Balkema Rotterdam 283–294 Google Scholar
Ben Sai, S., (1947). Note sur la végétation des hautes vallées du Sénégal et du Niger Première Conférence internationale sur l'Afrique de l'Ouest Vol. 1, 407–431 Dakar Google Scholar
Camps, G., (1969). Amekni: Néolithique ancien du Hoggar Mémoire du Centre de Recherches d'Anthropologie, Préhistoire et Ethnologie Arts et Métiers graphiques Paris 10 Google Scholar
Celles, J.C. Schulz, E., (1983). Pollens et macrorestes végétaux Petit-Maire, N. Riser, J. Sahara ou Sahel? Lamy Marseille 125–131 Google Scholar
Cour, P. Duzer, D., (1976). Persistance d'un climat hyperaride au Sahara central et méridional au cours de l'Holocène Revue de Géographie physique et de Géologie dynamique 18, 2–3 175–197 Google Scholar
Fabre, J. Petit-Maire, N., (1988). Holocene climatic evolution at 22–23°N from two paleolakes in the Taoudenni area (Northern Mali) Palaeogeography, Palaeoclimatology, Palaeoecology 65, 133–148 Google Scholar
Gasse, F. Fontes, J.C. Plaziat, J.C. Carbonel, P. Kacsmarska, I. De Deckker, P. Soulié-Marsche, I. Callot, Y. Dupeuble, P., (1987). Biological remains, geochemistry and stable isotopes for the reconstruction of environmental and hydrological changes in the Holocene lakes from north Sahara Palaeogeography, Palaeoclimatology, Palaeoecology 60, 1–2 1–46 Google Scholar
Gillet, (1968). Le Peuplement végétal du Massif de l'Enedi (Tchad) Memoire 17 Museum national d'Histoire naturelle Paris Google Scholar
Hamilton, A.C., (1982). Environmental History of East Africa. A Study of the Quaternary Academic Press London/New York Google Scholar
Haynes, C.V. Mead, A.R., (1987). Radiocarbon dating and paleoclimatic significance of subfossil Limicolaria in Northwestern Sudan Quaternary Research 28, 86–99 Google Scholar
Hutchinson, J. Dalziel, J.M. Flora of West Tropical Africa 1954–1972 Whitefriars London 3 vols,Google Scholar
Jaeger, P., (1956). Contribution à l'étude des forêts reliques du Soudan occidental Bulletin de l'Institut fondamental d'Afrique noire A 4, 993–1053 Google Scholar
Jaeger, P., (1959). Les plateaux gréseux du Soudan occidental. Leur importance phytogéographique Bulletin de l'Institut fondamental d'Afrique noire A 4, 1147–1159 Google Scholar
Janssen, C.R., (1981). On the reconstruction of past vegetation by pollen analysis: A review 4th International Palynological Conference, Lucknow, 1976–1977 Vol. 3, 163–172 Google Scholar
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
Kutzbach, J.E. Guetter, P.J., (1986). The influence of changing orbital parameters and surface boundary conditions on climate simulations for the past 18000 years Journal of Atmospheric Sciences 43, 1726–1759 Google Scholar
Kutzbach, J.E. Street-Perrott, F.A., (1985). Milankovitch forcing of fluctuations in the level of tropical lakes from 18 to 0 kyr BP Nature (London) 317, 130–134 CrossRefGoogle Scholar
Lézine, A.M., (1981). Le lac Abiyata (Ethiopie). Palynologie et climatologie du Quaternaire récent 3° Cycle Thesis University of Bordeaux 1 2 vols,Google Scholar
Lézine, A.M., (1986). Environnement et paléoenvironnement des Niayes depuis 12000 B.P. Changements globaux en Afrique durant le Quaternaire. Passé, Présent, Futur Faure, H. Diop, E.S. Travaux et Documents 197 ORSTOM Paris 261–263 Google Scholar
Lézine, A.M., (1986). Analyse palynologique. Carottes KS 12 et KS 14 Les marges continentales transformantes ouest africaines: Guinée, Sierra Leone, Côte d'Ivoire, Ghana Blasco, E. Mascle, J. Campagne Equamarge Vol. 1, IFREMER Paris 262–267 Campagnes océaniques françaises 3 Google Scholar
Lézine, A.M., (1987). Paléoenvironnements végétaux d'Afrique nord-tropicale depuis 12000 B.P. Ph.D. dissertation University of Marseille 2 2 vols,Google Scholar
Lézine, A.M., (1988). New data from the Sahel Review of Palaeobotany and Palynology 55, 141–154 Google Scholar
Lézine, A.M., (1988). Les variations de la couverture forestière mésophile d'Afrique occidentale au cours de l'Holocène Comptes rendus de l'Académie des Sciences, Paris 307, 439–445 Google Scholar
Lézine, A.M. Casanova, J., (1989). Pollen and hydrological evidence for the interpretation of past climates in Tropical West Africa during the Holocene Quaternary Science Reviews 8, 45–55 Google Scholar
Lézine, A.M. Casanova, J. Hillaire-Marcel, C., (1989). Across an early Holocene humid phase in Western Sahara, pollen and isotope stratigraphy Geology (in press) Google Scholar
Maley, J., (1972). La sédimentation pollinique actuelle dans la zone du lac Tchad (Afrique centrale) Pollen et Spores 14, 3 263–307 Google Scholar
Maley, J., (1981). Etudes palynologiques dans le bassin du Tchad et paléoclimatologie de l'Afrique nord-tropicale de 30000 ans à l'époque actuelle Travaux et Documents 129 ORSTOM Paris Google Scholar
Maley, J., (1982). Dust, clouds, rain types and climatic variations in tropical North Africa Quaternary Research 18, 1–6 CrossRefGoogle Scholar
Maley, J. Livingstone, D.A., (1983). Extension d'un éléments montagnard dans le sud du Ghana (Afrique de l'Ouest) au Pléistocène supérieur et à l'Holocène inférieur: Premières données polliniques Comptes rendus le l'Académie des Sciences, Paris 2, 296 Google Scholar
Maley, J. Livingstone, D.A., (1983). Extension d'un éléments montagnard dans le sud du Ghana (Afrique de l'Ouest) au Pléistocène supérieur et à l'Holocène inférieur: Premières données polliniques Comptes rendus le l'Académie des Sciences, Paris 2, 1287–1292 Google Scholar
McIntyre, A. Kipp, N.G. Bé, A.W.H. Crowley, T. Kellog, T. Gardner, J.V. Prell, W. Ruddiman, W.F., (1976). Glacial North Atlantic 18000 years ago: A CLIMAP reconstruction Investigation of Late Quaternary Paleoceanography and Paleoclimatology Cline, R.M. Hays, J.D. Memoir 145 Geological Society of America Boulder, CO 42–76 Google Scholar
Michel, P. Assémien, P. Etudes sédimentologique et palynologique des sondages de Bogué (basse vallée du Sénégal) et leur interprétation morphoclimatique Revue de Géomorphologie dynamique 19, 3 1969–1970 97–113 Google Scholar
Monod, T., (1943). Sur la présence de graines de Celtis dans le Quaternaire de Mauritanie Notes africaines 18, 3–4 Google Scholar
Mubarak, M.O. Bari, E.A. Wickens, G.E. Williams, M.A.J., (1982). The vegetation of the central Sudan Williams, M.A.J. Adamson, D.A. A Land between Two Niles Balkema Rotterdam 143–174 Google Scholar
Munson, P.J., (1976). Archaeological data on the origins of cultivation in the southwestern Sahara and their implications for West Africa Harlan, J.R. De Wet, J.M.J. Stemler, A.B.L. Origin of African Plant Domestication Mouton The Hague/Paris 187–209 Google Scholar
Pachur, H.J. Kröpelin, S., (1987). Wadi Howar: Paleoclimatic evidence from an extinct river system in the Southeastern Sahara Science 237, 298–300 Google Scholar
Petit-Maire, N. Fabre, J. Carbonel, P. Schulz, E. Aucour, A.M., (1987). La dépression de Taoudenni (Sahara malien) à l'Holocène Géodynamique 2, 2 127–160 Google Scholar
Proctor, M. Yeo, A., (1972). The Pollination of Flowers Taplinger New York Google Scholar
Quezel, P., (1965). La végétation du Sahara du Tchad à la Mauritanie Masson Paris Google Scholar
Quezel, P., (1969). Flore et végétation des plateux du Darfur nord-occidental et du Djebel Gourgueil (Soudan) Dossier CNRS-RCP 45 CNRS Paris Google Scholar
Raynal, A., (1963). Flore et végétation des environs de Kayar (Sénégal) (de la côte au lac Tanma) Annales de la Faculté des Sciences de Dakar 9, 121–231 Google Scholar
Regal, P.J., (1982). Pollination by wind and animals: Ecology of geographic patterns Annu. Rev. Ecol. Syst. 13, 497–524 CrossRefGoogle Scholar
Ritchie, J.C., (1987). A Holocene pollen record from Bir Atrun, Northwest Sudan Pollen et Spores 29, 4 391–410 Google Scholar
Ritchie, J.C. Eyles, C.H. Haynes, C.V., (1985). Sediment and pollen evidence for an early to mid-Holocene humid period in the eastern Sahara Nature (London) 314, 352–355 CrossRefGoogle Scholar
Ritchie, J.C. Haynes, C.V., (1987). Holocene vegetation zonation in the Eastern Sahara Nature (London) 330, 645–647 Google Scholar
Rognon, P., (1987). Late Quaternary climatic reconstruction for the Maghreb (North Africa) Palaeogeography, Palaeoclimatology, Palaeoecology 58, 11–34 CrossRefGoogle Scholar
Rossignol-Strick, M., (1985). Mediterranean quaternary sapropels, an immediate response of the African monsoon to variation of insolation Palaeogeography, Palaeoclimatology, Palaeoecology 49, 237–263 Google Scholar
Sarnthein, M. Tetzlaff, G. Koopmann, B. Walter, K. Pflaumann, V., (1981). Glacial and interglacial wind regimes over the eastern subtropical Atlantic and North-West Africa Nature (London) 293, 193–196 Google Scholar
Schnell, R., (1950). La forêt dense. Introduction à l'étude botanique de la région forestière d'Afrique occidentale Lechevallier Paris Google Scholar
Schnell, R., (1960). Notes sur la végétation et la flore des plateaux gréseux de la moyenne Guinée et de leurs abords Revue générale de Botanique 67, 325–398 Google Scholar
Schulz, E., (1987). Die Holozäne Vegetation der zentralen Sahara Coetzee, J.A. Van Zinderen Bakker, E.M. Palaeoecology of Africa Vol. 18, Balkema Rotterdam 143–162 Google Scholar
Servant-Vildary, S., (1977). Etude des diatomées et paléolimnologie du bassin tchadien au Cénozoique supérieur Travaux et Documents 84 ORSTOM Paris 2 vols,Google Scholar
Smith, A.B., (1975). A note on the flora and fauna from the postpaleolithic site of Karkarichinkat Nord and Sud West African Journal of Archaeology 5, 201–214 Google Scholar
Talbot, M.R. Livingstone, D.A. Palmer, P.G. Maley, J. Melack, J.M. Delibrias, G. Gulliksen, S., (1984). Preliminary results from sediment core from lake Bosumtwi, Ghana Coeztee, J.A. Van Zinderen Bakker, E.M. Palaeoecology of Africa Vol. 16, Balkema Rotterdam 173–192 Google Scholar
Toupet, C., (1966). Etude du milieu physique du massif de l'Assaba (Mauritanie). Institut fondamental d'Afrique noire Initiations aux Etudes Africaines 20 Dakar Google Scholar
Trochain, J., (1940). Contribution à l'étude de la végétation du Sénégal Larose Paris Google Scholar
Vincens, A. Casanova, J. Tiercelin, J.J., (1986). Palaeolimnology of lake Bogoria (Kenya) during the 4500 BP high lacustrine phase Sedimentation in the African Rifts Frostick, L.E. et al. Spec. Publ. 23 Geological Society London 315–322 Google Scholar
Walter, H. Harnickell, El Mueller-Dambois, D., (1975). Climate-Diagram Maps of the Individual Continents and the Ecological Climatic Regions of the Earth Springer Berlin Vegetation Monograph, Supplement Google Scholar
White, F., (1983). The Vegetation of Africa Unesco Paris Google Scholar
Whitehead, D.R., (1969). Wind pollination in the Angiosperms: Evolutionary and environmental considerations Evolution 23, 28–35 Google Scholar
Wickens, G.E., (1975). Quaternary plant fossils from the Jebel Marra volcanic complex and their paleoclimatic interpretation Palaeogeography, Palaeoclimatology, Palaeoecology 17, 2 109–122 Google Scholar
Wickens, G.E., (1982). Palaeobotanical speculations and Quaternary environments in the Sudan Williams, M.A.J. Adamson, D.A. A Land between Two Niles Balkema Rotterdam 23–50 Google Scholar