A high-resolution 11,400-Yr diatom record from Lake Victoria, East Africa

J. Curt Stager, Brian Cumming, Loren Meeker

Research output: Contribution to journalArticlepeer-review

113 Scopus citations

Abstract

Fine-interval (∼30-45 yr) sampling of a core from Lake Victoria's Damba Channel shows that numerous abrupt changes in the lake's diatom assemblages have occurred in response to climatic fluctuations over the past 11,400 14C yr. Four distinct climatic phases bounded by sudden transitions are inferred: (1) variably dry ∼11,400-10,000 yr B.P., (2) humid ∼10,000-7200 yr B.P., (3) more seasonal ∼7200-2200 yr B.P., and (4) more arid ∼2200-0 yr B.P., with a dry "Little Ice Age" event ∼600-200 yr B.P. The diatom-inferred paleoclimatic history for northern Lake Victoria closely resembles that inferred from a well-dated pollen record from Pilkington Bay. Spectral analysis of the diatom record reveals strong periodicities including globally distributed ∼2360-2550, ∼1400, ∼1030-1130, and ∼500 cal-yr cycles. Repeated, rapid shifts between Aulacoseira- and Nitzschia-dominated diatom assemblages suggest that post-1960 changes in the lake's phytoplankton communities have had earlier, climate-driven analogs.

Original languageEnglish (US)
Pages (from-to)81-89
Number of pages9
JournalQuaternary Research
Volume47
Issue number1
DOIs
StatePublished - Jan 1997

Bibliographical note

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

Continental Scientific Drilling Facility tags

  • LIAF

Fingerprint Dive into the research topics of 'A high-resolution 11,400-Yr diatom record from Lake Victoria, East Africa'. Together they form a unique fingerprint.

Cite this