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Article Dans Une Revue Review of Palaeobotany and Palynology Année : 2019

Sahel environmental variability during the last millennium: Insight from a pollen, charcoal and algae record from the Niayes area, Senegal

Résumé

The pollen, algae and charcoal record from the “Baobab” depression near Mboro in the Niayes area of Senegal shows that the last millennium was characterized by a gradual aridification which started 1340 CE and culminated 1845  CE. The sub-Guinean gallery forests, which survived the previous environmental crisis dated from the end of the Holocene Humid Period, suddenly collapsed and the Niayes region suffered a dramatic loss of biodiversity. We show that the tipping point between a forested and non-forested state occurred ca 400 centuries after the onset of aridity recorded by the lowering of the water level and the progressive salinization of the aquatic environment.
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hal-02370143 , version 1 (20-12-2021)

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Anne-Marie Lézine, Kévin Lemonnier, Cheikh Abdoul Kader Fofana. Sahel environmental variability during the last millennium: Insight from a pollen, charcoal and algae record from the Niayes area, Senegal. Review of Palaeobotany and Palynology, 2019, 271, pp.104103. ⟨10.1016/j.revpalbo.2019.104103⟩. ⟨hal-02370143⟩
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