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Article

The Role of External Factors in the Variability of the Structure of the Zooplankton Community of Small Lakes (South-East Kazakhstan)

1
Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Almaty 050040, Kazakhstan
2
Fisheries Research and Production Center, Almaty 050016, Kazakhstan
3
Institute of Zoology, Almaty 050060, Kazakhstan
*
Author to whom correspondence should be addressed.
Academic Editor: Marina Marcella Manca
Water 2021, 13(7), 962; https://doi.org/10.3390/w13070962
Received: 23 February 2021 / Revised: 27 March 2021 / Accepted: 29 March 2021 / Published: 31 March 2021
(This article belongs to the Special Issue Assessment of Water Quality)
The variability of hydrochemical parameters, the heterogeneity of the habitat, and a low level of anthropogenic impact, create the premises for conserving the high biodiversity of aquatic communities of small water bodies. The study of small water bodies contributes to understanding aquatic organisms’ adaptation to sharp fluctuations in external factors. Studies of biological communities’ response to fluctuations in external factors can be used for bioindication of the ecological state of small water bodies. In this regard, the purpose of the research is to study the structure of zooplankton of small lakes in South-East Kazakhstan in connection with various physicochemical parameters to understand the role of biological variables in assessing the ecological state of aquatic ecosystems. According to hydrochemical data in summer 2019, the nutrient content was relatively high in all studied lakes. A total of 74 species were recorded in phytoplankton. The phytoplankton abundance varied significantly, from 8.5 × 107 to 2.71667 × 109 cells/m3, with a biomass from 0.4 to 15.81 g/m3. Shannon diversity index of phytoplankton in the lakes at high altitude varied from 1.33 to 2.39 and from 0.46 to 3.65 in the lakes at lower altitudes. The average weight of the cells of algae species varied from 0.2079 to 1.5076 × 10−6 mg in the lakes at lower altitudes, the average weight of the cells of algae species changed from 0.6682 to 1.2963 × 10−6 mg in the lakes at higher altitudes. Zooplankton was represented by 58 taxa. The total abundance of zooplankton varied from 0.05 to 169.00 thousand ind./m3 with biomass of 0.51–349.01 mg/m3. Shannon diversity of zooplankton in the lakes at lower altitude fluctuated from 0.42 to 2.32 and it was 0.66–1.77 in the lakes at higher altitudes. The average individual mass of specimens in zooplankton in mountain lakes ranged from 0.021 to 0.037 mg and varied from 0.002 to 0.007 mg in other lakes. The main factors in the development of the structure of zooplankton communities in small lakes were temperature, TDS, the content of nitrates, phosphates, and the composition and biomass of planktonic algae. The hydrochemical and biological data of the investigated lakes indicated their organic pollution. Our results once again confirmed the applicability of structural variables of zooplankton in assessing water quality. View Full-Text
Keywords: species richness; species diversity; phytoplankton; statistical analysis; redundancy analysis species richness; species diversity; phytoplankton; statistical analysis; redundancy analysis
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MDPI and ACS Style

Aubakirova, M.; Krupa, E.; Mazhibayeva, Z.; Isbekov, K.; Assylbekova, S. The Role of External Factors in the Variability of the Structure of the Zooplankton Community of Small Lakes (South-East Kazakhstan). Water 2021, 13, 962. https://doi.org/10.3390/w13070962

AMA Style

Aubakirova M, Krupa E, Mazhibayeva Z, Isbekov K, Assylbekova S. The Role of External Factors in the Variability of the Structure of the Zooplankton Community of Small Lakes (South-East Kazakhstan). Water. 2021; 13(7):962. https://doi.org/10.3390/w13070962

Chicago/Turabian Style

Aubakirova, Moldir; Krupa, Elena; Mazhibayeva, Zhanara; Isbekov, Kuanysh; Assylbekova, Saule. 2021. "The Role of External Factors in the Variability of the Structure of the Zooplankton Community of Small Lakes (South-East Kazakhstan)" Water 13, no. 7: 962. https://doi.org/10.3390/w13070962

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