Diversity and Ecology of Diatoms in Pliocene Deposits of the Tunka Valley (Baikal Rift Zone)

Titova, Lyubov’; Hassan, Abdulmonem; Mikhailov, Ivan; Rodionova, Elena; Rasskazov, Sergei; Usoltseva, Мarina

doi:10.3390/d13100479

Open AccessArticle

Diversity and Ecology of Diatoms in Pliocene Deposits of the Tunka Valley (Baikal Rift Zone)

by

Lyubov’ Titova

^1,*,†

,

Abdulmonem Hassan

^2,3,†

,

Ivan Mikhailov

¹,

Elena Rodionova

¹,

Sergei Rasskazov

^2,4 and

Мarina Usoltseva

^1,†

¹

Limnological Institute of the Siberian Branch of the Russian Academy of Sciences, 3 Ulan-Batorskaya, 664033 Irkutsk, Russia

²

Institute of the Earth’s Crust of the Siberian Branch of the Russian Academy of Sciences, 128 Lermontova, 664033 Irkutsk, Russia

³

Geology Department, Faculty of Science, Al-Baath University, Homs PB 77, Syria

⁴

Geological Faculty, Irkutsk State University, 3 Lenin, 664003 Irkutsk, Russia

^*

Author to whom correspondence should be addressed.

^†

These authors have an equal contribution to the study.

Diversity 2021, 13(10), 479; https://doi.org/10.3390/d13100479

Submission received: 5 August 2021 / Revised: 24 September 2021 / Accepted: 26 September 2021 / Published: 29 September 2021

(This article belongs to the Special Issue Freshwater Siliceous Microeukaryotes)

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Abstract

Fossil diatoms are an excellent tool for reconstructing the palaeoenvironmental and palaeogeographic changes involving lacustrine systems. In this work, the diatom content of Pliocene sediments recovered from a core extracted in the Tunka Basin (Baikal Rift Zone, Russia) is described. Revealed by light and scanning electron microscopy, 170 species of diatoms were found. Benthic, alkaliphilic, indifferent, cosmopolitan, and oligosaprobe species predominated. Ecological, geographical, and stratigraphic analysis of diatoms showed two ecozones, differing in taxonomic diversity of species. From the data obtained, palaeoenvironmental conditions of these zone formations have been reconstructed. It was shown that during the period corresponding to sedimentation in Ecozone II, the reservoir was cooler, as suggested by the increase of arctic-alpine taxa. The absence of Baikal Pliocene endemics and the presence of local endemics in the Tunka core indicate that there was no geographical connection between the palaeolake of the Tunka Valley and Lake Baikal during the Pliocene.

Keywords: diatom ecozone; Tunka Valley; Baikal; Pliocene; ecogeographical characteristics

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MDPI and ACS Style

Titova, L.; Hassan, A.; Mikhailov, I.; Rodionova, E.; Rasskazov, S.; Usoltseva, М. Diversity and Ecology of Diatoms in Pliocene Deposits of the Tunka Valley (Baikal Rift Zone). Diversity 2021, 13, 479. https://doi.org/10.3390/d13100479

AMA Style

Titova L, Hassan A, Mikhailov I, Rodionova E, Rasskazov S, Usoltseva М. Diversity and Ecology of Diatoms in Pliocene Deposits of the Tunka Valley (Baikal Rift Zone). Diversity. 2021; 13(10):479. https://doi.org/10.3390/d13100479

Chicago/Turabian Style

Titova, Lyubov’, Abdulmonem Hassan, Ivan Mikhailov, Elena Rodionova, Sergei Rasskazov, and Мarina Usoltseva. 2021. "Diversity and Ecology of Diatoms in Pliocene Deposits of the Tunka Valley (Baikal Rift Zone)" Diversity 13, no. 10: 479. https://doi.org/10.3390/d13100479

APA Style

Titova, L., Hassan, A., Mikhailov, I., Rodionova, E., Rasskazov, S., & Usoltseva, М. (2021). Diversity and Ecology of Diatoms in Pliocene Deposits of the Tunka Valley (Baikal Rift Zone). Diversity, 13(10), 479. https://doi.org/10.3390/d13100479

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Diversity and Ecology of Diatoms in Pliocene Deposits of the Tunka Valley (Baikal Rift Zone)

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