Floristic characteristics of the mosaic and how forest progress on savanna in the lamto reserve region (Côte D’ivoire)?

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Author: 
Koulibaly Annick, Kouamé Djaha, GrogaNoel, Kouassi Kouassi Etienne, Bakayoko Adama and Porembski Stefan
Abstract: 

A large band of forest-savanna mosaic extends between the Sudanian (dry) and Guinean (humid) regions in West Africa and undergoes bush fires, agriculture and logging, in the central parts of Côte d'Ivoire, especially in the Lam to Reserve region. Former studies showed a remarkable degree of vegetation dynamics in this region with forests advancing against savanna. However, the floristic components of the mosaic and the relevant tree species involved in the regeneration dynamics were not identified. Vegetational data were recorded along eight forest-savanna transects by distinguishing segments inside or close to the border zone for each type of vegetation. Our results showed a continuous floristic variability between forest and savanna but a real distinction between floristic compositions of transects segments. Six pioneer tree species like Trichilia prieureana, Erythroxylum emarginatum, Holarrhena floribunda were identified as responsible of the forest progress on savanna in the Lam to Reserve region. This regeneration was realized in a broad transition belt of 60 m in length between forest and savanna. These results allow making a warned choice of the know more about the conditions of forest regeneration in the forest-savanna mosaics.

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