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Diatom evidence of 20th century ecosystem change in Lake Baikal, Siberia

Roberts, Sarah; Swann, George; McGowan, Suzanne; Panizzo, Virginia; Vologina, Elena; Sturm, Michael; Mackay, Anson

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Sarah Roberts

Suzanne McGowan

Elena Vologina

Michael Sturm

Anson Mackay


Lake Baikal has been experiencing limnological changes from recent atmospheric warming since the 1950s, with rising lake water temperatures, reduced ice cover duration and reduced lake surface-water mixing due to stronger thermal stratification. This study uses lake sediment cores to reconstruct recent changes (c. past 20 years) in Lake Baikal’s pelagic diatom communities relative to previous 20th century diatom assemblage records collected in 1993 and 1994 at the same locations in the lake. Recent changes documented within the core-top diatom records agree with predictions of diatom responses to warming at Lake Baikal. Sediments in the south basin of the lake exhibit clear temporal changes, with the most rapid occurring in the 1990’s with shifts towards higher abundances of the cosmopolitan Synedra acus and a decline in endemic species, mainly Cyclotella minuta and Stephanodiscus meyerii and to a lesser extent Aulacoseira baicalensis and Aulacoseira skvortzowii. The north basin, in contrast, shows no evidence of recent diatom response to lake warming despite marked declines in north basin ice cover in recent decades. This study also shows no diatom-inferred evidence of eutrophication from deep water sediments. However, due to the localised impacts seen in areas of Lake Baikal’s shoreline from nutrient pollution derived from inadequate sewage treatment, urgent action is vital to prevent anthropogenic pollution extending into the open waters.


Roberts, S., Swann, G., McGowan, S., Panizzo, V., Vologina, E., Sturm, M., & Mackay, A. (2018). Diatom evidence of 20th century ecosystem change in Lake Baikal, Siberia. PLoS ONE, 13(12), Article e020876.

Journal Article Type Article
Acceptance Date Nov 26, 2018
Online Publication Date Dec 19, 2018
Publication Date Dec 19, 2018
Deposit Date Nov 26, 2018
Publicly Available Date Dec 21, 2018
Journal PLoS ONE
Electronic ISSN 1932-6203
Publisher Public Library of Science
Peer Reviewed Peer Reviewed
Volume 13
Issue 12
Article Number e020876
Public URL
Publisher URL


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