Data on Holocene vegetation in the Atlantic Sahara in Palaeoecology of Africa and the surrounding islands-Vol 13.
Afrique ; Géographie de l'Afrique ; Holocène ; Paléobiogéographie ; Quaternaire zone chaude ; Sahara ; Sahara Atlantique ; Végétation
Macro and micro botanical remains point to a Holocene environment of open grass and Chenopodiaceae vegetation, with varied herbs and some shrubs. The plant cover could have been somewhat denser than nowadays to explain the geomorphological
, palaeontological and archaeological context at the same period. However the data show no qualitative latitudinal change in vegetation during the last 40,000 years.
Nigerian vegetational history from the Late Quaternary to the present day in Palaeoecology of Africa and the surrounding islands-Vol 13.
; Quaternaire zone chaude ; Végétation
Etude palynologique, avec datations radiométriques, d'une carotte de 36 m prélevée dans le delta du Niger. Les données polliniques ont été corrélées avec dix unités phytoécologiques reconnues dans la végétation actuelle. L'évolution de la végétation
Fossil pollen of the upper 30 m of a core with a length of 162 m taken near the shore of Lake Abiyata in the Ethiopian Rift Valley has been analysed. The results are compared with surface pollen spectra of different vegetation types. The sequence
data which show that a long series of conspicuous changes in climate and vegetation occurred over the last 35 000 years. These changes include greater expansions of sub-humid montane, relatively dry savanna and cool ericaceous elements in the Late