δ13C variation of soil organic matter as an indicator of vegetation change during the Holocene in central Cameroon     

Thierry Desjardins  Bruno Turcq  Jean-Pierre Nguetnkam  Gaston Achoundong  Magloire Mandeng-Yogo  Fethyé Cetin  Anne-Marie Lézine 《Comptes Rendus Geoscience》2013,345(7-8):266-271

In order to better understand the dynamics of the forest–savanna mosaic from central Cameroon, we analyzed ¹³C and ¹⁴C profiles of six oxisols: two under forests and four under savannas. The δ¹³C soil profiles collected in the forests indicate that these environments are stable at least since the mid-Holocene, whereas the areas currently covered by savannas were formerly occupied by more forested vegetations. The ¹⁴C dating of organic matter indicate that the late extension of the savannas in central Cameroon date from the Late Holocene, starting from 4000–3500 ¹⁴C yr BP.  相似文献