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Phytoliths as indicators of grassland dynamics during the Holocene from lake sediments in the Ubari sand sea, Fazzan Basin, Libya

Published online by Cambridge University Press:  03 March 2015

Adrian Parker ,
Belinda Harris ,
Kevin White  and
Nick Drake
Adrian Parker
Affiliation:
Department of Anthropology and Geography, Oxford Brookes University, UK
Belinda Harris
Affiliation:
Department of Anthropology and Geography, Oxford Brookes University, UK
Kevin White
Affiliation:
Landscape and Climate Research Group, Department of Geography, University of Reading, UK
Nick Drake
Affiliation:
Department of Geography, Kings College London, UK
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Abstract

This paper presents the first study of phytoliths from the Saharan region. Phytolith analysis shows the potential of reconstructing grassland dynamics during the Holocene, refining our knowledge of palaeoecosystems in the Ubari sand sea, Libya. The lake sediments studied range in age between 3,273–9,440 cal. BP. Tree cover was very low around 3,273–3,436 cal. BP and 6,678–6,796 cal. BP, and the landscape was dominated by C4 grasslands around 6,678–6,796 cal. BP, shifting to a more mixed C3-C4 grassland community around 3,273–3,436 cal. BP. These differences may be caused by the older sample being deposited during the onset of a brief arid period, but a similar phytolith assemblage could arise due to a more pronounced seasonality in the climate, with C3 grasses dominating late and early in the growing season when the climate is cooler and less arid, and C4 grasses becoming dominant in the hot, dry summer season.

Type
Articles
Information
Libyan Studies , Volume 39 , 2008 , pp. 29 - 40
Copyright
Copyright © Society for Libyan Studies 2008

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