Features of Plankton Metabolism: Results of Automated Measurements in the Mozhaisk Reservoir

A. V. Goncharov; Гончаров А. В.; V. V. Puklakov; Пуклаков В. В.; M. G. Grechushnikova; Гречушникова М. Г.; N. M. Yumina; Юмина Н. М.

doi:10.31857/S0320965223010060

Features of Plankton Metabolism: Results of Automated Measurements in the Mozhaisk Reservoir

Authors: Goncharov A.V.¹, Puklakov V.V.¹, Grechushnikova M.G.¹, Yumina N.M.¹
Affiliations:
1. Lomonosov Moscow State University
Issue: No 1 (2023)
Pages: 28-34
Section: ФИТОПЛАНКТОН, ФИТОБЕНТОС, ФИТОПЕРИФИТОН
URL: https://journals.rcsi.science/0320-9652/article/view/134881
DOI: https://doi.org/10.31857/S0320965223010060
EDN: https://elibrary.ru/KSGSFO
ID: 134881

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Abstract
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Abstract

Plankton metabolism determines fluctuations in the oxygen concentrations of a water body, its ecological condition, and exchange of СО₂ with the atmosphere. We used an automated device that allowed us to make mass measurements of intraday values of the gross primary production (GPP) and respiration (R) of plankton. During our studies of the Mozhaisk reservoir (Russia) in the summer of 2017, we established an important fact: the maximum values of GPP are observed essentially earlier in the daytime than those of R. This is explained by the fact that GPP is related to solar radiation (the maximum values are observed at noon), whereas R is related to the temperature of water, which reaches its maximum several hours after in the afternoon. As a result, the maximum value of dissolved oxygen is observed in the second half of the day, when GPP and R become even. The device we have designed may be used for continuous monitoring of metabolism of plankton and of its responses to various hydrometeorological, hydrochemical and anthropogenic impacts.

Keywords

primary production, respiration of plankton, intraday changes, automated measurement, dissolved oxygen, Mozhaisk reservoir

References

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