A preliminary investigation of siliceous microfossil succession in late quaternary sediments from Lake Baikal, Siberia
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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.
| 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 |
| Google Analytic Metrics | Metrics page |