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A late Holocene record of human impacts on tropical environments from non-pollen palynomorphs, Albertine Rift, western Uganda

Published online by Cambridge University Press:  22 October 2019

Lawrence M. Kiage ,
Meghan Howey ,
Joel Hartter  and
Michael Palace
Lawrence M. Kiage*
Affiliation:
Department of Geosciences, Georgia State University, Atlanta, Georgia 30302, USA
Meghan Howey
Affiliation:
Anthropology Department, University of New Hampshire, Durham, New Hampshire 03824, USA
Joel Hartter
Affiliation:
Environmental Studies Program, University of Colorado Sustainability, Energy, and Environment Community, Boulder, Colorado 80303, USA
Michael Palace
Affiliation:
Earth System Research Center, Department of Earth Sciences, University of New Hampshire, Durham, New Hampshire 03824, USA
*
*Corresponding author e-mail address: lkiage@gsu.edu (L.M. Kiage).
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Abstract

Non-pollen palynomorphs and elemental geochemistry data from Lake Kifuruka in western Uganda provide evidence of environmental change in the tropical African region since the beginning of the Holocene. The multi-proxy record presented here shows that dry conditions dominated the end of the Pleistocene evidenced by calcium enriched sediments and suppressed fungal taxa activity. Moist conditions dominated the early Holocene and persisted until just after 1960 cal yr BP. Elevated frequencies of individual fungal spore taxa associated with herbivory and soil erosion, including Sordaria-type, Sporormiella-type, Chaetomium-type, and Glomus-type, about 4300 cal yr BP suggests a significant environmental change that could be linked to human activities. A convergence of multiple proxy data, including microscopic charcoal, elemental geochemistry, and fungal spores, strongly support the occurrence of anthropogenic forest disturbance in the Albertine Rift about 4300 cal yr BP.

Keywords

Tropical AfricaAlbertine RiftCrater lakes, paleoenvironmental changeFungal spores, elemental geochemistryHuman disturbance
Type
Research Article
Information
Quaternary Research , Volume 93 , January 2020 , pp. 172 - 186
Copyright
Copyright © University of Washington. Published by Cambridge University Press, 2019 

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