From desiccation to wetlands and outflow: rapid re-filling of Lake Victoria during the Latest Pleistocene 14–13 ka

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From desiccation to wetlands and outflow : rapid re-filling of Lake Victoria during the Latest Pleistocene 14–13 ka

Wienhues, Giulia (author): Oeschger Center for Climate Change Research and Institute of Geography, University of Bern, Bern, Switzerland

Temoltzin-Loranca, Yunuen (author): Oeschger Center for Climate Change Research and Institute of Geography, University of Bern, Bern, Switzerland; Institute of Plant Sciences, University of Bern, Bern, Switzerland

Vogel, Hendrik (author): Institute of Geological Sciences, University of Bern, Bern, Switzerland

Morlock, Marina A. (author): Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,Institute of Geological Sciences, University of Bern, Bern, Switzerland

Cohen, Andrew S. (author): Department of Geosciences, University of Arizona, AZ, Tucson, United States

Anselmetti, Flavio S. (author): Institute of Geological Sciences, University of Bern, Bern, Switzerland

Bernasconi, Stefano M. (author): Department of Earth Sciences, ETH Zürich, Zurich, Switzerland

Jaggi, Madalina (author): Department of Earth Sciences, ETH Zürich, Zurich, Switzerland

Tylmann, Wojciech (author): Institute of Geography, Gdańsk University, Gdańsk, Poland

Kishe, Mary A. (author): Tanzania Fisheries Research Institute, Dar es Salaam, Tanzania

King, Leighton (author): Department of Fish Ecology and Evolution, Swiss Federal Institute for Aquatic Science and Technology (EAWAG), Kastanienbaum, Switzerland; Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland

Ngoepe, Nare (author): Department of Fish Ecology and Evolution, Swiss Federal Institute for Aquatic Science and Technology (EAWAG), Kastanienbaum, Switzerland; Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland

Courtney-Mustaphi, Colin J. (author): Department of Environmental Sciences, University of Basel, Basel, Switzerland; Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania

Muschick, Moritz (author): Department of Fish Ecology and Evolution, Swiss Federal Institute for Aquatic Science and Technology (EAWAG), Kastanienbaum, Switzerland; Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland

Matthews, Blake (author): Department of Fish Ecology and Evolution, Swiss Federal Institute for Aquatic Science and Technology (EAWAG), Kastanienbaum, Switzerland; Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland

Mwaiko, Salome (author): Department of Fish Ecology and Evolution, Swiss Federal Institute for Aquatic Science and Technology (EAWAG), Kastanienbaum, Switzerland; Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland

Seehausen, Ole (author): Department of Fish Ecology and Evolution, Swiss Federal Institute for Aquatic Science and Technology (EAWAG), Kastanienbaum, Switzerland; Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland

Tinner, Willy (author): Institute of Plant Sciences, University of Bern, Bern, Switzerland

Grosjean, Martin (author): Oeschger Center for Climate Change Research and Institute of Geography, University of Bern, Bern, Switzerland

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Elsevier, 2023
2023
English.
In: Journal of Great Lakes research. - : Elsevier. - 0380-1330.

Related links:: https://doi.org/10.1...; show more...; https://umu.diva-por... (primary) (Raw object); https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Reconstructing hydrological variability is critical for understanding Lake Victoria's ecosystem history, the evolution of its diverse endemic fish community, the dynamics of vegetation in the catchment, and the dispersal of aquatic and terrestrial fauna in the East African Rift system during Latest Pleistocene and Holocene times. Whereas consensus exists on widespread desiccation of Lake Victoria ∼18 – 17 ka, the re-filling history (16 – 13 ka) has remained highly controversial. Here, we present data from four new sediment cores along a depth transect. We use lithostratigraphic core correlation, sediment facies, XRF data, wetland vegetation analysis (Typha pollen), and 14C chronologies of unprecedented precision to document Latest Pleistocene lake-level variability. At our coring site in the central basin, local Typha wetlands existed >16.7 ka, alternating with periods of desiccation. Moisture increased slightly between ca. 16.7 – 14.5 ka and wetlands with permanent, shallow ponds established simultaneously in the center and the marginal, more elevated parts of the flat lake basin. After ca. 14.0 ka, lake levels increased; wetlands in the central basin were submerged and replaced by lacustrine environments and a >50 m deep lake established ca. 13.5 ka, likely with intermittent overflow most of the time. The lake reached modern or even above-modern levels around 10.8 ka. This lake-level history is consistent with regional terrestrial paleoenvironmental reconstructions, notably the expansion of Afromontane and rainforest. Our data suggest a complex picture of paleoclimatic conditions in Eastern Africa and teleconnections to the North-Atlantic and Indian Ocean domains.

Subject headings

NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)

Keyword

Climate change
Eastern Africa
Lake sediments
Late quaternary
Limnogeology
Paleolimnology

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NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geosciences Mult ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Climate Research

Articles in the publication: Journal of Great ...

By the university: Umeå University

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