Distribution patterns of Tubifex tubifex (Oligochaeta, Tubificinae) genetic lineages in relation to environmental factors in the Vychegda River basin
M. A. Baturina1, M. A. Golubev1,2, A. S. Bakashkina1,2, Yu. V. Marchenko2, A. B. Novakovskiy1
1Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, Institute of Biology, Syktyvkar, Russia
2Federal state budgetary educational institution of higher education "Pitirim Sorokin Syktyvkar State University", Syktyvkar, Russia
Keywords: genetic diversity, freshwater oligochaetes, cox1, northeastern European Russia
Abstract
The results of DNA barcoding of Tubifex tubifex from various freshwater bodies within the Vychegda River basin (Komi Republic, Russia) are discussed. A molecular genetic analysis of 32 specimens collected from 14 locations, based on nucleotide sequences of the mitochondrial cytochrome c oxidase subunit I (cox1) gene fragment, revealed six distinct lineages (A, B, C, D, E, J) exhibiting inter-lineage divergence exceeding 17-24 %. A significant correlation was identified between the genetic diversity of the species and habitat characteristics, including hydrological and hydrochemical parameters of water and sediments. The observed ecological differentiation supports the presence of heterogeneous adaptive traits within T. tubifex and highlights the importance of considering population genetic structure in ecological assessments of freshwater ecosystems.
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