Journal of Siberian Federal University. Biology / Abiotic Factors Influencing the Formation of Recent Cladocera Community Structures in Tundra Lakes in the Pechora River Delta (Nenets Autonomous Okrug)

Full text (.pdf)
Issue
Journal of Siberian Federal University. Biology. 2025 18 (3)
Authors
Nigmatullin, Niyaz M.; Frolova, Larisa A.; Shneidman, Yan T.
Contact information
Nigmatullin, Niyaz M. : Kazan (Volga Region) Federal University Kazan, Russian Federation; ORCID: 0000-0001-6863-8666; Frolova, Larisa A.: Institute of Archaeology and Ethnography SB RAS Novosibirsk, Russian Federation; ; ORCID: 0000-0001-8505-0151; Shneidman, Yan T. : Moscow Institute of Physics and Technology Dolgoprudny, Russian Federation; ORCID: 0009-0009-6672-446X
Keywords
Cladocera; Cladocera; Pechora River Delta; Arctic freshwater ecosystems; paleolimnological analysis
Abstract

Arctic freshwater ecosystems are undergoing profound transformations driven by global climate change and increasing anthropogenic impact, resulting in a major restructuring of biological systems. However, our knowledge of Arctic freshwater fauna remains fragmented and incomplete. Cladocerans, an important component of freshwater ecosystems, are recognized as effective indicators of the ecological conditions of water bodies that respond sensitively to environmental changes. In this study, we examined the influence of local abiotic factors in shaping the Cladocera community composition in surface sediments from 47 tundra lakes in the Pechora River delta (Malozemelskaya tundra). A paleolimnological approach was applied to examine the taxonomic diversity of cladocerans in these lakes. Additionally, morphometric and hydrochemical characteristics of the water bodies were obtained. Relationships between cladoceran communities and abiotic environmental parameters were analyzed using the ordination methods (redundancy analysis, RDA) and Spearman correlation analysis. Three environmental variables – mineralization, pH, and lake area – were identified as having the strongest influence on the Cladocera community structure. Also, these parameters were the most variable among the studied lakes. The abundance of Pleuroxus uncinatus and Alona quadrangularis remains showed the strongest positive correlation with mineralization, whereas the abundance of Bosmina (Eubosmina) longispina and Alonopsis elongata remains was negatively correlated with both mineralization and pH. The abundance of Bosmina (Eubosmina) longispina remains showed a significant positive correlation with the lake area, while abundance of Chydorus cf. sphaericus remains was negatively correlated with it. Overall, our study highlights the high potential of Cladocera as indicators in paleoecological research into northern ecosystems, which is especially relevant in the context of ongoing environmental change

Pages
347–364
EDN
BRZXZS
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/157490

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