Diatom stratigraphy of the last 250 ka at Lake El’gygytgyn,northeast Siberia |
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| Authors: | Marina V Cherapanova Jeffrey A Snyder Julie Brigham-Grette |
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| Institution: | (1) Institute of Biology and Soil Science FEB RAS, 159 Prospect 100-Letiya, 690022 Vladivostok, Russia;(2) Department of Geology, Bowling Green State University, 190 Overman Hall, Bowling Green, OH 43403, USA;(3) Department of Geosciences, University of Massachusetts, Morrill Science Building, Box 35820, Amherst, MA 01003, USA |
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| Abstract: | Diatom species counts were conducted on 171 sediment samples from the 13-m-long core PG1351 from Lake El’gygytgyn, northeast
Siberia. The planktonic Cyclotella ocellata-complex dominates the diatom assemblage through most of the core record, persisting through a variety of climate conditions.
Periphytic diatoms, although less abundant, have greater diversity and greater down-core assemblage variation. During warm
climate modes, longer summer ice-free conditions may have allowed more complex diatom communities to develop in shallow-water
habitats, and enhanced circulation may have increased transport of these diatoms to deeper parts of the lake. Zones of low
overall diatom abundance further support inferred intervals of low lake productivity during times of extended lake ice and
snow cover. More data on the modern spatial and temporal distribution of diatom species in the Lake El’gygytgyn system will
improve inferences from core records.
This is the last in a series of eleven papers published in this␣special issue dedicated to initial studies of El'gygytgyn Crater Lake and
its catchment in NE Russia. Julie Brigham-Grette, Martin Melles, Pavel Minyuk were guest editors of this special issue. |
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| Keywords: | Diatoms Lake El’ gygytgyn Siberia Paleoclimate Quaternary |
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