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Interpretation of Holocene lake-level change from diatom assemblages in Lake Sidi Ali, Middle Atlas, Morocco

Barker, Philip and Roberts, N. and Lamb, H. F. and Van Der Kaars, S. and Benkaddour, A. (1994) Interpretation of Holocene lake-level change from diatom assemblages in Lake Sidi Ali, Middle Atlas, Morocco. Journal of Paleolimnology, 12 (3). pp. 223-234. ISSN 0921-2728

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Abstract

While palaeohydrological changes in non-outlet lakes provide a key proxy indicator of past climatic fluctuations, for lake systems which have been chemically insensitive, it is necessary to use indicators of water depth rather than salinity to reconstruct their hydro- climatic histories. A study of diatoms in the modern sediments of Sidi Ali, a non-outlet lake in the Middle Atlas of Morocco, has shown a statistically significant correlation between water depth and the ratio of planktonic to littoral diatoms. This relationship is used to calibrate fossil diatom assemblages from a lake sediment core from the same lake to provide a quantitative index of water levels over the pastc. 6500 years. Palaeoecological evidence suggests that climatically induced hydrological variations have dominated the bulk of the mid-late Holocene lake sediment record, with significant human-induced catchment disturbance only occurring during the twentieth century. The pattern of water depth fluctuations suggests that the response time of the regional groundwater system to climatic forcing is <100>

Item Type: Article
Journal or Publication Title: Journal of Paleolimnology
Additional Information: 1994 Interpretation of Holocene lake-level change from diatom assemblages in Lake Sidi Ali, Middle Atlas, Morocco
Uncontrolled Keywords: diatoms ; lake-level ; Middle Atlas ; Morocco ; Holocene ; Palaeohydrology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 53059
Deposited By: ep_importer_pure
Deposited On: 19 Mar 2012 11:25
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 23:13
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/53059

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