Hydrochemical Characteristic of the Littoral Zone of Lake Onega

Сабылина, А. В.; Ryzhakov, A. V.

doi:10.1134/s0097807818020148

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…Yet, the absorption is not uniform over the wavelength, and the light spectrum is not only modified in intensity but also in shape. This phenomenon is particularly relevant for waters with high coloured dissolved organic matter (CDOM), such as Lake Onego bay (Sabylina and Ryzhakov 2018), where the short wavelength radiation is strongly absorbed compared to the rest of the visible spectra (Röttgers and Doerffer 2007). With the recent development of underwater hyperspectral radiometers, the wavelength-dependent penetration and absorption of the visible domain relevant for the heat budget can be assessed.…”

Section: Introductionmentioning

confidence: 99%

Under-ice convection dynamics in a boreal lake

et al. 2019

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We investigated radiatively driven under-ice convection in Lake Onego (Russia) during 3 consecutive late winters. In ice-covered lakes, where the temperature of water is below the temperature of maximum density, radiatively driven heating in the upper water column induces unstable density distributions leading to gravitational convection. In this work, we quantified the key parameters to characterise the radiatively driven under-ice convection: (1) the effective buoyancy flux, B * (driver), and its vertical distribution; (2) the convective mixed-layer thickness, h CML (depth scale); and (3) the convective velocity, w * (kinematic scale). We compared analytical w * scaling estimates to in situ observations from high-resolution acoustic Doppler current profilers. The results show a robust correlation between w * and the direct observations, except during the onset and decay of the solar radiation. Our results highlight the importance of accurately defining the upper limit of h CML in highly turbid water and the need for spectrally resolving solar radiation measurements and their attenuation for accurate B * estimates. Uncertainties in the different parameters were also investigated. We finally examined the implications of under-ice convection for the growth rate of nonmotile phytoplankton and provide a simple heuristic model as a function of easily measurable parameters.

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Section: Introductionmentioning

confidence: 99%

Under-ice convection dynamics in a boreal lake

et al. 2019

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“…The water contained a sufficient amount of oxygen (8.60-8.82 mg O 2 /L) and had a neutral pH (7.16-7.36) and low hardness (21.45-29.33 mg HCO 3 − /L; Supporting Information, Table S3). These chemical indicators are common in the littoral zone of Lake Onego, where the species G. fasciatus lives (Sabylina & Ryzhakov, 2018).…”

Section: Experimental Conditionsmentioning

confidence: 99%

“…Pelagic waters were used as the medium for laboratory experiments because of significantly lower suspended solid content than in littoral waters. In all other aspects, the chemical compound of the pelagic waters corresponds to the littoral zone at the place of animal capture (Sabylina & Ryzhakov, 2018).…”

Section: Trapping Of G Fasciatus Characteristics Of the Trapping Area...mentioning

confidence: 99%

Assessment of Microplastic Size Range and Ingestion Intensity by Gmelinoides fasciatus Stebbing, an Invasive Species of Lake Onego

Kalinkina

Zobkov

Zobkova

et al. 2021

Enviro Toxic and Chemistry

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To indicate the potential role of Gmelinoides fasciatus, an invasive species of Lake Onego, in the inclusion of microplastics into food webs, several indicators were evaluated: its ability to ingest microplastics, the preferred size ranges, and the ingestion intensity. For this purpose, irregularly shaped polystyrene copolymer particles (acrylonitrile butadiene styrene plastics, artificially crushed) of four size classes (<50, 50-100, 100-250, >250 µm) were used. Gmelinoides fasciatus actively ingested microplastic particles, and in treatment with particles of 100-250 µm in size, the consumption rate was the highest. The crustaceans that survived the experiment ingested smaller particles than the deceased ones. Based on the size-frequency distributions of the ingested particles and the same in the suspension, crustaceans preferred smaller particles than those in suspension. The mean size of the ingested particles was 100 ± 5 µm. However, considering the actual concentration of microplastic fragments in the sediments of Lake Onego, in natural conditions, a negative effect of microplastic fragments on the G. fasciatus population is unlikely. At the same time, the ability of the invasive species G. fasciatus to consume microplastics and their active integration into the food webs of Lake Onego through consumption by fish can be considered reliable factors of the entry of microplastics in the fish of Lake Onego.

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“…Accordingly, modern requirements for the description of the object, which are necessary for making informed management decisions, cannot be satisfied. This is mainly due to the deterioration of the network observation quality in the 1990s and 2000s that occurred during the period with the most significant climate changes [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Isotope Composition of Natural Water in Lake Onega Basin

Borodulina

Tokarev

Yakovlev

2023

Water

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In 2009–2018, the isotopic composition of oxygen and hydrogen in the atmospheric precipitation, groundwater and river and lake water of Lake Onega basin was studied. The weighted annual isotope composition of precipitation at Petrozavodsk was δ18O = −11.7‰ and δ2H = −84‰ and varied from −30.9 to −4.1‰ for δ18O and from −23 to −22‰ for δ2H. The isotopic composition of the water in Lake Onega was relatively uniform from −11.5 to −9.3‰ for δ18O and from −85 to −71‰ for δ2H. In the bays, the isotopic composition of the water varied more substantially than in the central part of the lake due to the river runoff during springtime flooding. In late summer, the concentrations of deuterium and oxygen-18 increased in the lake water, and figurative points on the δ2H vs. δ18O diagram shifted above the meteoric line. The absorption of the isotopically heavy summer precipitation and disequilibrium isotope fractionation during evaporation led to the enrichment of the lake water by heavy isotopes. Experiments were conducted to estimate the evaporation influence on the isotope enrichment of the residual water, and a comparison of the obtained isotope data with the experimental function showed that commonly, about 4% and up to 12% of water was lost during the spring and summer, respectively. In the water of the tributaries, the abundance of the deuterium and oxygen-18 varied in a wider scale than in the lakes, from −14.4 to −9.1‰ for δ18O and from −102 to −73‰ for δ2H. An evaporation loss of up to 35% was found for the rivers in late summer, and this value was proportional to the area of lakes and wetlands in the elementary watershed. The initial isotope composition of the water in the tributaries prior to evaporation was estimated to be δ18O ≈ −14.1‰ and δ2H ≈ −103‰ on average and crossed the approximation and meteoric lines. This estimation was close to the average composition of the groundwater, i.e., δ18O ≈ −13.4‰ and δ2H ≈ −94‰ on the Lake Onega catchment. The slightly increased isotope depletion of the calculated composition in the initial river water in comparison with the groundwater was the result of the contribution of the spring snowmelt water, which had a significant influence on the lake water balance.

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Hydrochemical Characteristic of the Littoral Zone of Lake Onega

Cited by 4 publications

References 2 publications

Under-ice convection dynamics in a boreal lake

Under-ice convection dynamics in a boreal lake

Assessment of Microplastic Size Range and Ingestion Intensity by Gmelinoides fasciatus Stebbing, an Invasive Species of Lake Onego

Isotope Composition of Natural Water in Lake Onega Basin

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