Sebkhas as ecological archives and the vegetation and landscape history of southeastern Tunisia during the last two millennia

Schulz, Erhard, Abichou, Abdelhakim, Hachicha, Tarek, Pomel, Simon, Salzmann, Ulrich and Zouari, Kamel (2002) Sebkhas as ecological archives and the vegetation and landscape history of southeastern Tunisia during the last two millennia. Journal of African Earth Sciences, 34 (3-4). pp. 223-229. ISSN 1464-343X

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Abstract

Sebkhas are temporary lacustrine systems depending on the number and extension of floodings. They may create laminated sediments which can be exploited as ecological archives. Contrary to those of meromictic lakes they are seasonal but not annual. After each flooding a detritus layer and a plasmo-condensed layer of bacteria and algae are formed in the water body or film and during the subsequent dessication a third subaeric layer of evaporites is build up. These laminae show a quasi-textile fabric and they can trap and conserve any dust and fine grained material. A high resolution pollendiagram covering the last two millennia as well as geochemical analysis from a southeastern Tunisian sebkha demonstrate the potentials of these ecological archives.

Item Type:	Article
Subjects:	F600 Geology
Department:	Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User:	Ulrich Salzmann
Date Deposited:	27 Mar 2013 14:54
Last Modified:	12 Oct 2019 22:53
URI:	http://nrl.northumbria.ac.uk/id/eprint/11389

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