Modern and fossil diatom assemblages from Bol’shoy Lyakhovsky Island (New Siberian Archipelago, Arctic Siberia)

This article discusses the results of a taxonomic and ecological investigation of diatoms from polygonal ponds and Quaternary permafrost deposits of Bol’shoy Lyakhovsky Island (New Siberian Archipelago) and the reconstruction of climatic changes on the Island during late Pleistocene/Holocene transit...

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Bibliographic Details
Published in:Contemporary Problems of Ecology
Main Authors: Palagushkina, Olga V., Wetterich, Sebastian, Schirrmeister, Lutz, Nazarova, Larisa B. (Dr.)
Format: Article in Journal/Newspaper
Language:English
Published: 2017
Subjects:
ddc:550
Institut für Umweltwissenschaften und Geographie
Arctic
permafrost
Thermokarst
Siberia
Online Access:https://publishup.uni-potsdam.de/frontdoor/index/index/docId/54796
https://doi.org/10.1134/S1995425517040060
Description
Summary:This article discusses the results of a taxonomic and ecological investigation of diatoms from polygonal ponds and Quaternary permafrost deposits of Bol’shoy Lyakhovsky Island (New Siberian Archipelago) and the reconstruction of climatic changes on the Island during late Pleistocene/Holocene transition using fossil diatom assemblages from the permafrost deposits. The taxonomic list of diatoms includes 159 diatom species. The main ecological factors that determine the distribution of diatoms in the investigated data set are mean July air temperature, рН, electrical conductivity, water depth, and concentrations of Si4+ and Al3+. An increase in water depth and stable lacustrine conditions in the Lateglacial–Holocene in the ancient thermokarst lake relate to Lateglacial warming before 11860 ± 160 years BP and during the early Holocene between 11210 ± 160 and 7095 ± 60 years BP.

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