Siberian Federal University

Issue

Journal of Siberian Federal University. Biology. 2024 17 (3)

Authors

Lopatina, Tatiana S.; Khoroshko, Ksenia V.; Zadereev, Egor S.

Contact information

Lopatina, Tatiana S.: Institute of Biophysics SB RAS Federal Research Center “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; ORCID: 0000-0002-9171-8354; Khoroshko, Ksenia V.: Institute of Biophysics SB RAS Federal Research Center “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; Zadereev, Egor S.: Institute of Biophysics SB RAS Federal Research Center “Krasnoyarsk Science Center SB RAS” Krasnoyarsk, Russian Federation; Siberian Federal University Krasnoyarsk, Russian Federation; ORCID: 0000-0003-2366-8604

Keywords

Cladocera; freshwater salinization; life history traits; population dynamics; resting eggs; post-diapause females

Abstract

Freshwater salinization may have important implications for the abundance and diversity of zooplankton, which play a key role in the functioning of aquatic ecosystems. Many of these animals undergo developmental arrest in the embryonic stage, which allows them to survive harsh periods and cope with seasonal unfavorable environmental conditions. We studied the effects of salinity in the experiments with individuals and populations of the cladoceran Moina macrocopa on the life history traits and population parameters important for cyclical development of animals: the hatching success of resting eggs; the survival of hatchlings; individual performance of post- diapause females and performance of populations initiated by post- diapause females. We observed a decreasing sequence of salinities critical for traits and parameters studied in this work: from 8 g L -1, critical for hatching of resting eggs, to 1 g L-1, critical for the ability of a population initiated by post- diapause females to produce resting eggs. We conclude that the relatively low salinity (1 g L-1) that does not suppress the hatching of resting eggs reduces the ecologically significant ability of the M. macrocopa populations to replenish the bank of resting eggs. Thus, freshwater salinization, in the long term, will prevent the re-establishment of M. macrocopa and most probably other freshwater cladoceran populations from the banks of resting eggs

Pages

287–301

EDN

EMADDE

Paper at repository of SibFU

https://elib.sfu-kras.ru/handle/2311/153848

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).