Pollenanalytical studies in NE-Nigeria: preliminary results from the Manga Grasslands and Lake Tilla, Biu Plateau

Two sites situated in the Sahelian and Sudanian zones of NE-Nigeria were chosen for pollen analysis. A sediment core from an interdunal depression in the eastern Manga Grassland provides information on the Holocene veget
Two sites situated in the Sahelian and Sudanian zones of NE-Nigeria were chosen for pollen analysis. A sediment core from an interdunal depression in the eastern Manga Grassland provides information on the Holocene vegetation history of the Sahel between c. 9600-3400 B.P. The 3 m pollen record indicates an open savanna during the mid-Holocene. The presence of Sudano-Guinean taxa, which were mainly restricted to the interdunal depressions, points to more humid conditions. Already before c. 4000 B.P., a slow change towards drier conditions and the establishment of the modern Sahelian vegetation is visible in the diagram. This development was accompanied by high fire frequencies. A 16 m core from a crater lake (Lake Tilla) in the Sudanian zone of NE-Nigeria provides a pollen record which can be dated back to approximately 11-12000 B.P. Preliminary pollen spectra show a relatively constant pattern with a dominance of grass pollen even during the middle Holocene.
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Metadaten
Author:Ulrich Salzmann
URN:urn:nbn:de:hebis:30-36169
Parent Title (German):Sonderforschungsbereich Kulturentwicklung und Sprachgeschichte im Naturraum Westafrikanische Savanne <Frankfurt, Main>: Vorträge, internationales Symposium / SFB 268
Series (Serial Number):Berichte des Sonderforschungsbereichs 268 (08, 321)
Publisher:SFB 268
Place of publication:Frankfurt, M.
Document Type:Part of a Book
Language:English
Date of Publication (online):2006/12/20
Year of first Publication:1996
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2006/12/20
Pagenumber:11
First Page:321
Last Page:331
HeBIS PPN:290248582
Institutes:SFB 268
Dewey Decimal Classification:570 Biowissenschaften; Biologie
Sammlungen:Universitätspublikationen
Sondersammelgebiets-Volltexte
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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