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Vegetation changes in Empakaai Crater, northern Tanzania, at 14,800–9300 cal yr BP
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
2006 (English)In: Review of Palaeobotany and Palynology, ISSN 0034-6667, Vol. 140, 163-174 p.Article in journal (Refereed) Published
Abstract [en]

Vegetation changes are documented from a well-dated pollen record from Lake Emakat, Empakaai Crater, northern Tanzania.

This pollen record includes the time interval covering the Pleistocene/Holocene transition, analysed at a resolution interval

averaging 200 yr. Around the crater lake, an Hagenia-forest development starting at 14,500 cal yr BP lasted until 13,000 cal yr BP.

A change in vegetation, indicated by an increased proportion of Nuxia congesta in the forest and Artemisia in the afro alpine

grassland after 13,000 cal yr BP, corresponds in time to the Northern Hemisphere's Younger Dryas cooling. Grasses and sedges

increased at ∼10,100 cal yr BP, indicating a significant increase in local pollen possibly attributed to lowered lake level, related to

drier conditions. Although the Empakaai pollen record documents continuous forest conditions, from 14,500 to 10,100 cal yr BP,

the variation in the proportion of forest components seem to respond to environmental changes at the millennium scale

Place, publisher, year, edition, pages
2006. Vol. 140, 163-174 p.
Keyword [en]
East Africa; pollen analysis; Pleistocene/Holocene transition; vegetation change
National Category
Physical Geography
Identifiers
URN: urn:nbn:se:su:diva-21130OAI: oai:DiVA.org:su-21130DiVA: diva2:187656
Available from: 2008-01-16 Created: 2008-01-16 Last updated: 2011-01-11Bibliographically approved

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CiteExportLink to record
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