The characteristic pattern of multiple colored layers in coastal stratified lakes in the process of separation from the White Sea

Krasnova, E. D.; Маторин, Д. Н.; Белевич, Т. А.; Efimova, L. E.; Kharcheva, Anastasia V.; Kokryatskaya, N. M.; Losyuk, Galina; Todorenko, D. A.; Voronov, Dmitry A.; Patsaeva, Svetlana V.

doi:10.1007/s00343-018-7323-2

Cited by 27 publications

(13 citation statements)

References 46 publications

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“…This material, coupled with autochthonous organic matter, is deposited within the anaerobic zone, bypassing complete degradation. Furthermore, increased productivity occurs within the chemocline zone of these lakes, driven by bacterial contributions [23]. Consequently, the TOC content in the anaerobic segments of the examined water bodies reaches up to 23%.…”

Section: Discussionmentioning

confidence: 92%

“…In terms of biogenic components (P-PO 4− , 0-56 µg/L; N-NH 4+ , 0-20 µg/L; Si, 0.02-2 mg/L), the upper layer of the water column (myxolimnion) in the studied lakes (Cape Zeleny lagoon, Kislo-Sladkoe, Trekhtzvetnoe Lake) can be classified as oligotrophic. However, productivity experiences a sharp increase in the chemocline zone due to the proliferation of unicellular phototrophs, while in the anoxic zone, a substantial concentration of nutrients was observed [23].…”

Section: Study Areamentioning

confidence: 99%

“…Unlike Trekhtzvetnoe Lake, seawater enters Lake Kislo-Sladkoe during spring tides and strong wind surges, while freshwater runoff remains negligible. Consequently, surface waters with low salinity are established, reaching minimum values (6-7 PSU) after snow and ice melting, and peaking during winter (20)(21)(22)(23)(24)(25). Waters below a depth of 2 m exhibit salinity levels approximately equivalent to or higher than those in the sea (24 PSU), a result of salt crystallization during winter freezing [28].…”

Section: Study Areamentioning

confidence: 99%

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Heavy Metals in Sediments of Subarctic Meromictic Lakes of the White Sea as Possible Tracers of Environmental Changes

Budko,

Demina,

Krasnova

et al. 2023

JMSE

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Meromictic lakes of the marine coast, quite widely distributed in the northern hemisphere, are the result of climate changes and glacier retreat. The bottom sediments of these lakes serve as a geological chronicle of the history of marine basin’s development with the geochemical occurrence forms of elements indicate various processes of their accumulation. This paper presents research results concerning the occurrence of forms of heavy metals in lake sediments along the coast of the White Sea. These results are based on a sequential seven step leaching procedure, followed by ICP-MS analysis and subsequent statistical data processing. To determine differences among the examined geochemical parameters, Pearson’s correlation analysis and Ward’s cluster analysis were utilized. The total content of Cr, Mn, Fe, Co, Ni, Zn, V, and Pb in the sediments did not exhibit significant differences based on their degree of isolation from the sea. The major contribution to deposition of these metals in sediments of the meromictic lakes studied is the residual form, encompassing the mineral matrix of the sediment. At the same time, the elevation of mobile forms for all the metals examined corresponds to an increase in the isolation of lakes from the White Sea. In the meromictic lake sediments, concentrations of Cu, Mo, and U demonstrated significant increases in forms tightly bound to organic matter, while Cd exhibited an association with Fe-Mn oxyhydroxides. Notably, a significant difference in the occurrence forms of Cu, Cd, Mo, and U was evident in the reduced sediments of meromictic lakes when compared to those of open sea bays. The meromictic lakes along the White Sea coast, positioned at various stages of isolation, hold promise for investigating the migration of metals in response to environmental changes.

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Section: Discussionmentioning

confidence: 92%

Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

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Heavy Metals in Sediments of Subarctic Meromictic Lakes of the White Sea as Possible Tracers of Environmental Changes

Budko,

Demina,

Krasnova

et al. 2023

JMSE

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“…В оз. Трехцветное граница аэробной зоны на протяжении многих лет находится на постоянной глубине 2 m [15,18,19], поэтому были выбраны горизонты 0 m -поверхностная вода, 1.5 m (аэробная зона выше хемоклина), 1.975 m и 2.000 m (верхняя граница хемоклина), 2.225 и 2.450 m (нижняя, анаэробная часть хемоклина). В оз.…”

Section: исследованные объекты и методика измеренийunclassified

“…В оз. Еловое положение границы аэробной зоны тоже постоянно, она располагается на глубине 3 m [15,18,19]. Для исследования были взяты глубины 0 и 1.500 m (аэробная зона), 2.875 и 3.000 m (верхняя часть хемоклина), 3.100 и 3.325 m (нижняя, анаэробная часть хемоклина).…”

Section: исследованные объекты и методика измеренийunclassified

Спектрально-Люминесцентные Характеристики Растворенного Органического Вещества В Меромиктических Водоемах Кандалакшского Залива Белого Моря

Соколовская¹,

Жильцова²,

Краснова³

et al. 2023

Оптика И Спектроскопия

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The optical properties of chromophoric dissolved organic matter (CDOM) of natural water have been studied by fluorescence spectroscopy and absorption spectroscopy. Samples of natural water from various depths from the meromictic lakes Trekhtzvetnoe and Elovoe were taken. The dependences of the quantum yield and the maximum of fluorescence emission on the excitation wavelength in a wide range of excitation wavelength variation (250...500 nm) for different horizons of stratified reservoirs are obtained. It is shown that the dependences of the maximum of the fluorescence emission on the excitation wavelength and the dependences of fluorescence quantum yield on the excitation wavelength in both lakes and at all depths studied are similar. On the other hand, the absolute value of the quantum yield differs in different layers of water. For example, the values of the fluorescence quantum yield took values from 1.4% to 2.4% at an excitation wavelength of 340 nm. The similar nature of the dependence of the fluorescence intensity on the excitation wavelength is explained by the common origin of DOM fluorophores in the studied horizons of stratified lakes. The different values of the fluorescence quantum yield are due to the difference in the proportion of aromatic compounds in the composition of the CDOM and are associated with differences in the hydrochemical characteristics of water at different horizons.

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Preface: Value and dynamics of salt lakes in a changing world

et al. 2018

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The characteristic pattern of multiple colored layers in coastal stratified lakes in the process of separation from the White Sea

Cited by 27 publications

References 46 publications

Heavy Metals in Sediments of Subarctic Meromictic Lakes of the White Sea as Possible Tracers of Environmental Changes

Heavy Metals in Sediments of Subarctic Meromictic Lakes of the White Sea as Possible Tracers of Environmental Changes

Спектрально-Люминесцентные Характеристики Растворенного Органического Вещества В Меромиктических Водоемах Кандалакшского Залива Белого Моря

Preface: Value and dynamics of salt lakes in a changing world

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