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A preliminary investigation of siliceous microfossil succession in late quaternary sediments from Lake Baikal, Siberia

Journal of Paleolimnology

By:
, , , and
DOI:10.1023/A:1007924310688

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Abstract

Siliceous microfossil assemblage succession was analyzed in a 100 m sediment core from Lake Baikal, Siberia. The core was recovered from the lake's central basin at a water depth of 365 m. Microfossil abundance varied greatly within the intervals sampled, ranging from samples devoid of siliceous microfossils to samples with up to 3.49 x 1011 microfossils g-1 sediment. Fluctuations in abundance appear to reflect trends in the marine δ18O record, with peak microfossil levels generally representing climate optima. Microfossil taxa present in sampled intervals changed considerably with core depth. Within each sample a small number of endemic diatom species dominated the assemblage. Changes in dominant endemic taxa between sampled intervals ranged from extirpation of some taxa, to shifts in quantitative abundance. Differences in microfossil composition and the association of variations in abundance with climate fluctuations suggest rapid speciation in response to major climatic excursions.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A preliminary investigation of siliceous microfossil succession in late quaternary sediments from Lake Baikal, Siberia
Series title:
Journal of Paleolimnology
DOI:
10.1023/A:1007924310688
Volume:
18
Issue:
2
Year Published:
1997
Language:
English
Contributing office(s):
Woods Hole Coastal and Marine Science Center
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Paleolimnology
First page:
187
Last page:
204
Online Only (Y/N):
N
Additional Online Files (Y/N):
N