Ibragimova A.G.1*, Seleznev D.G.2, Frolova L.A.3, Subetto D.A.4, Potakhin M.S.4,5,6, Belkina N.A.4,5, Kotov A.A.1 2025. Cladoceran remains as a tool for reconstruction of past environmental conditions during the Late Pleistocene–Holocene in Central Karelia (NW Russia). Part I. Traditional quantitative analysis // Arthropoda Selecta. Vol.34. No.2: 192–204 [in English].
1 A.N. Severtsov Institute of Ecology and Evolution of Russian Academy of Sciences, Leninsky Ave. 33, Moscow 119071 Russia.
2 Papanin Institute for Biology of Inland Waters Russian Academy of Sciences, Borok, Yaroslavl Area 152742 Russia.
3 Institute of Archaeology and Ethnography SB RAS, Kutateladze Str. 7/3, Novosibirsk 630090 Russia.
4 Нerzen State Pedagogical University of Russia, Moika Embankment 48, St. Petersburg 191186 Russia.
5 Northern Water Problems Institute of the Karelian Research Centre of the Russian Academy of Sciences, A. Nevskogo Str. 50, Petrozavodsk 185030 Russia.
6 Petrozavodsk State University, Lenin Ave. 33, Petrozavodsk 185910 Russia.
Aisylu Ibragimova: ais5_ibragimova@mail.ru; https://orcid.org/0000-0002-3667-0466
Dmitriy Seleznev: dmitriy@seleznev.name; http://orcid.org/0000-0003-2782-1696
Larisa Frolova: larissa.frolova@mail.ru; http://orcid.org/0000-0001-8505-0151
Dmitry Subetto: subetto@mail.ru; https://orcid.org/0000-0002-3585-8598
Maxim Potakhin: mpotakhin@mail.ru; https://orcid.org/0000-0002-2630-2176
Natalia Belkina: bel110863@mail.ru; https://orcid.org/0002-0002-9928-022X
Alexey Kotov: alexey-a-kotov@yandex.ru; https://orcid.org/0000-0002-8863-6438
* Corresponding author
doi:10.15298/arthsel.34.2.05
ABSTRACT. The bottom sediment core of 2.9 m. length was taken from Lake Torosjarvi (Central Karelia, NW Russia) from the ice in April 2016 using a Russian corer (diameter 0.5 cm, lehgth 1 m). Radiocarbon dating demonstrated that this core covers the Holocene, and even Late Pleistocene. To study the cladoceran remains, 33 sediment samples were collected in 6–8 cm intervals throughout the core. The remains of 42 cladoceran taxa were identified; Bosmina (Eubosmina) cf. longispina, Biapertura affinis and Alona quadrangularis were predominanted in the subfossil community (taphocenosis) of the lake. The cladoceran taphocenosis of Lake Torosjarvi included five faunistic zones, and the composition of predominants changed throughout the core. These changes were most probably associated with fluctuations in climatic conditions in NW Russia and variations in the water levels due to a separation of Lake Torosjarvi from a larger Lake Segozero. Analysis of the cladoceran remains demonstrated that Lake Torosjarvi was cold-water, oligotrophic, and rather deep during its history.
KEY WORDS: Holocene, paleolimnology, taphocenosis, subfossil, Cladocera.