Data/hora: 01/06/2024 15:23:39

Provedor de dados: | 5
País: | France
Título: | Intensifying Weathering and Land Use in Iron Age Central Africa
Autores: | Bayon, Germain; Dennielou, Bernard; Etoubleau, Joel; Ponzevera, Emmanuel; Toucanne, Samuel; Bermell, Sylvain.
Data: | 2012-03
Ano: | 2012
Resumo: | About 3000 years ago, a major vegetation change occurred in Central Africa, when rainforest trees were abruptly replaced by savannas. The consensus is that the forest disturbance was caused by climate change. We show here that chemical weathering in Central Africa, reconstructed from geochemical analyses of a marine sediment core, intensified abruptly at the same period, departing significantly from the long-term weathering fluctuations related to the Late Quaternary climate. Evidence that this weathering event was also contemporaneous with the migration of Bantu-speaking farmers across Central Africa suggests that human land-use intensification at that time already had a significant impact on the rainforest.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00069/18031/15574.pdf

DOI:10.1126/science.1215400

Editor: | Amer Assoc Advancement Science
Relação: | http://archimer.ifremer.fr/doc/00069/18031/
Formato: | application/pdf
Fonte: | Science (0036-8075) (Amer Assoc Advancement Science), 2012-03 , Vol. 335 , N. 6073 , P. 1219-1222
Fonte: | 2012 American Association for the Advancement of Science. All Rights Reserved.