Siliceous microfossil distribution in the surficial sediments of Lake Baikal |
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| Authors: | E F Stoermer M B Edlund C H Pilskaln C L Schelske |
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| Institution: | (1) Center for Great Lakes and Aquatic Sciences, University of Michigan, 2200 Bonisteel Blvd., 48109-2099 Ann Arbor, MI, USA;(2) Department of Oceanography, University of Maine, 04469 Orono, ME, USA;(3) Department of Fisheries and Aquaculture, University of Florida, 7922 NW 71st Street, 32606 Gainesville, FL, USA |
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| Abstract: | Examination of surficial sediments at 16 stations shows minor, but consistent differences in the numbers and kinds of siliceous microfossils deposited in different regions of Lake Baikal. There is a general north-south decreasing trend in total microfossil abundance on a weight basis. Endemic plankton diatom species are the most abundant component of assemblages at all stations. Chrysophyte cysts are present at all stations, but most forms are more abundant at northern stations. Non-endemic plankton diatom species are most abundant at southern stations. Small numbers of benthic diatoms and sponge spicules are found in all samples. Although low numbers are present in offshore sediments, the benthic diatom flora is very diverse. Principal components analysis confirms primary north-south abundance trends and suggests further differentiation by station location and depth. |
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| Keywords: | Russia Lake Baikal paleolimnology diatoms stomatocysts |
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