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| Titel |
Dynamic diatom response to changing climate 0-1.2 Ma at Lake El'gygytgyn, Far East Russian Arctic |
| VerfasserIn |
J. A. Snyder, M. V. Cherepanova, A. Bryan |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 9, no. 3 ; Nr. 9, no. 3 (2013-06-24), S.1309-1319 |
| Datensatznummer |
250018068
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| Publikation (Nr.) |
 copernicus.org/cp-9-1309-2013.pdf |
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| Zusammenfassung |
| The Lake El'gygytgyn sediment record contains an abundant diatom flora
through most intervals of the lake's history, providing a means to create and
test hypotheses concerning the lake's response to changing climates. The
0–1.2 Ma core interval is characterized by shifts in the dominant planktonic
genera and events of exceptional concentration and diversity. Warm
interglacial intervals have enhanced concentration and diversity of the
plankton. This response is most extreme during exceptional events
corresponding to marine isotope stages (MIS) 11 and 31. Diatom concentration and diversity also
increase during some cold intervals (e.g., MIS 2), suggesting conditions of
lake circulation and nutrient cycling promoting diatom production during
these events. Short intervals of low plankton concentration accompanied by
shifts in the dominant genus of the lake suggest conditions during certain
cold events generate a severe impact on plankton production. The absence of
these events during extended intervals of low summer insolation variability
suggests a muted cold-event response of the lake system linked to regional
climate. |
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