Journal of Siberian Federal University. Biology / Planktonic Communities in the Torey Lakes (Zabaikalsky Krai) in a Low Water Year

Full text (.pdf)
Issue
Journal of Siberian Federal University. Biology. 2018 11 (4)
Authors
Afonina, Ekaterina Yu.; Tashlykova, Natalya A.
Contact information
Afonina, Ekaterina Yu.: Institute of Natural Resources, Ecology and Cryology SB RAS 16a Nedorezov Str., Chita, 672014, Russia; ; Tashlykova, Natalya A.: Institute of Natural Resources, Ecology and Cryology SB RAS 16a Nedorezov Str., Chita, 672014, Russia
Keywords
phytoplankton; zooplankton; species composition; abundance; biomass; the Torey Lakes
Abstract

Lakes Barun-Torey and Zun-Torey are the largest water bodies in Zabaikalsky Krai, and they are characterized by long-term cyclic changes in the water level. Samples of the planktonic community (algae and invertebrates) were collected from the Torey Lakes in June, August, and October in the dry 2016. Collection and processing of the samples was carried out using standard hydrobiological methods. The aim of the study was to investigate the planktonic communities in the Torey Lakes. The lakes were in different hydrological phases: Barun-Torey was in the initial filling phase (with isolated small lakes present on the dried bed), and Zun-Torey was in the shallowing phase. Considerable differences were observed between the compositions and structures of the planktonic communities, which were determined by the mineral content of the water. Diverse littoral plankton developed, consisting of 2-25 taxa of algae (total number of taxa – 46) and 2-15 species of invertebrates (total number of species – 29) in the oligohaline small lakes on the bottom of Lake Barun-Torey. The abundance and biomass of aquatic organisms varied within very wide limits: for phytoplankton – from 0.7 × 103 to 1260.0 × 103 cells / L and from 0.1 to 1271.0 mg / m3, and for zooplankton – from 9.2 × 103 to 19370.0 × 103 individuals / m3 and from 3.8 to 361.7 g / m3. Freshwater and euryhaline species were dominant. In polyhaline Lake Zun-Torey, the phytoplankton consisted of 3-12 taxa of algae (total number of taxa – 18), and the invertebrate fauna included only 3 species. The abundance of phytoplankton varied from 12.4 × 103 to 310.7 × 103 cells / L and a biomass from 1.0 to 14.7 mg / m3, and the abundance of zooplankton varied from 55.1 × 103 to 1656.0 × 103 individuals / m3 and a biomass from 1.1 to 85.5 g / m3. Euryhaline and halophilic species dominated

Pages
306-320
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/109183

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