Diatom responses and geochemical feedbacks to environmental changes at Lake Rauchuagytgyn (Far East Russian Arctic)

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Abstract 14 C-dated 6.5 m long sediment core and a 210 Pb-dated 23 cm short core retrieved from Lake Rauchuagytgyn in Chukotka, Arctic Russia. Our main objectives are to reconstruct the environmental history and ecological development of the lake during the last 29 kyr and to investigate the main drivers behind bioproduction shifts. The methods comprise age-modeling, accumulation rate estimation, and light microscope diatom species analysis of 74 samples, as well as organic carbon, nitrogen, and mercury analysis. Diatoms have appeared in the lake since 21.8 ka cal BP and are dominated by planktonic Lindavia ocellata 176.1 × 10 9 2  a1), organic carbon accumulation rates (OCARs; mean 4.6 g m- 2 - 1 µ g m- 2 - 1 2 and Hg sinks during warm climate episodes driven by insolation-enhanced within-lake primary productivity. Maintaining intact natural lake ecosystems should therefore be of interest to future environmental policy.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Diatom responses and geochemical feedbacks to environmental changes at Lake Rauchuagytgyn (Far East Russian Arctic) ; volume:20 ; number:9 ; year:2023 ; pages:1691-1712 ; extent:22
Biogeosciences ; 20, Heft 9 (2023), 1691-1712 (gesamt 22)

Creator: Biskaborn, Boris
Forster, Amy
Pfalz, Gregor
Pestryakova, Lyudmila A.
Stoof-Leichsenring, Kathleen R.
Strauß, Jens
Kröger, Tim
Herzschuh, Ulrike

DOI: 10.5194/bg-20-1691-2023

URN: urn:nbn:de:101:1-2023051104374474077099

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 14.08.2025, 10:50 AM CEST

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Associated

Biskaborn, Boris
Forster, Amy
Pfalz, Gregor
Pestryakova, Lyudmila A.
Stoof-Leichsenring, Kathleen R.
Strauß, Jens
Kröger, Tim
Herzschuh, Ulrike

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