Anthropogenic Transformations in the Mouth Area of Tributaries as Factors of Negative Impact on Lake Baikal

Gagarinova, O. V.; Belozertseva, I. A.; Vorobyeva, I. B.; Vlasova, N. V.; Emelyanova, N. V.; Сороковой, А. А.

doi:10.3390/w13091295

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…According to previous research [53][54][55], in 2015-2016 (during the extremely low water level), the content of HMs in Barguzin water was as follows: iron (36-130 µg/dm 3 ) and manganese (4-24 µg/dm 3 ), zinc (5-18 µg/dm 3 ), copper (1-18 µg/dm 3 ); in single samples, lead (up to 6 µg/dm 3 ) and chromium (up to 5 µg/dm 3 ) were detected. The content of HMs in sediments was the following: (mg/kg) iron (17,600), zinc (35.7-84.2), copper (7.2-8.5), lead (2.1-2.8), cadmium (0.5-1.0) [53].…”

Section: Heavy Metal Content In Water and Sediments Of The Barguzin R...mentioning

confidence: 99%

Heavy Metal Content in Fish of the Barguzin River (Eastern Cisbaikalia) and Assessment of Potential Risks to Human Health

Bazarsadueva,

Shiretorova,

Nikitina

et al. 2023

Water

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In this paper, the levels of nine heavy metals in the organs and tissues of six commercially important fish species from the Barguzin River (Eastern Cisbaikalia, Russia), bream Abramis brama, roach Rutilus rutilus, crucian carp Carassius carassius, common carp Cyprinus carpio, perch Perca fluviatilis and northern pike Esox lucius, were investigated. The distribution of HMs in the fish organs and tissues was unequal and was determined by both their physiological functions and routes of entry. The study also characterized the environmental habitats, including water and sediments, and conducted an assessment of potential risks to human health associated with fish consumption. The results showed that the levels of Fe, Zn, Cu, Ni, Cd, Pb, Cr and Hg in the muscle tissue of fish from the Barguzin River were generally low and did not exceed the maximum allowable concentrations established in Russia and worldwide. However, Mn levels in a number of samples exceeded the corresponding maximum allowable concentrations, which may be attributed to its elevated presence in the habitat. The calculated fish condition factor K showed good health status of fish from the Barguzin River. The highest Metal Pollution Index values were recorded for northern pike scales (5.9), which, however, corresponded to a low level of contamination. The other metal pollution index values for fish organs and tissues were all below five, indicating either no or very low contamination. Risk to human health was assessed using target hazard quotients and hazard index. None of these indices, both for each fish species studied and for each of the nine heavy metals, exceeded one. This indicated that consumption of the fish species studied did not pose an excessive risk of non-carcinogenic health effects to humans. The data on the content of nine heavy metals in the main commercially caught fish species from the Barguzin River indicated a low level of tissue and organ contamination by heavy metals and the absence of health risks to humans associated with their consumption as food.

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Section: Heavy Metal Content In Water and Sediments Of The Barguzin R...mentioning

confidence: 99%

Heavy Metal Content in Fish of the Barguzin River (Eastern Cisbaikalia) and Assessment of Potential Risks to Human Health

Bazarsadueva,

Shiretorova,

Nikitina

et al. 2023

Water

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“…There is no production plant at the coast of Lake Baikal dumping untreated sewage water into the lake. Nevertheless, the recreation and human impacts on the environment have increased significantly [68]. The dramatic effect relates to the absence of wastewater treatment plants on the Lake Baikal coast.…”

Section: Phytoplankton Fa Composition and Fa Peroxidationmentioning

confidence: 99%

Fatty Acid Changes in Nearshore Phytoplankton under Anthropogenic Impact as a Biodiversity Risk Factor for the World’s Deepest Lake Baikal

et al. 2022

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In this study, we present results on fatty acid analysis of phytoplankton of Lake Baikal, the world’s deepest lake, which differs from other lakes by its oceanic features. Since we used a large-mesh net, the net sample phytoplankton were primarily represented by the large elongated diatom Synedra acus. subsp. radians (Kützing) Skabichevskij. The similar algae composition of net samples of spring season phytoplankton collected at different sites of the lake allows us to compare results of the fatty acid analysis of these samples. The phytoplankton diversity of the sedimentation samples was contrary represented by 32 algae species. There are clear changes in the fatty acid composition of net phytoplankton exposed to anthropogenic impacts of varying intensity. The content of polyunsaturated fatty acids in phytoplankton collected from central stations (pelagic stations at a distance of ~10–30 km from the shoreline) without anthropogenic impact was higher by up to 15% than phytoplankton collected from nearshore stations (littoral stations at a distance of ~0.01–0.05 km from the shoreline) and offshore stations (pelagic stations at a distance of ~3 km from the shoreline). The interlaboratory precision of fatty acid determination of phytoplankton is estimated as ≤10%. We found high content of the lipid peroxidation marker (80–340 μg g−1 of dry weight) in phytoplankton from nearshore and offshore stations with intensive anthropogenic impact. In phytoplankton from central stations, we did not find any lipid peroxidation. Determination of unsaturated fatty acids, coupled with analysis of fatty acid peroxidation products, can be used to evaluate the level of anthropogenic impact in terms of ecological health and biodiversity conservation.

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“…The study of river mouths from the point of view of oceanology has been a pressing task for many researchers over the past few years [1][2][3][4]. This applies to both private research related to environmental pollution and complex work that combines the efforts of specialists from different fields of science [5,6].…”

Section: Introductionmentioning

confidence: 99%

Comprehensive studies of river mouths flowing into the Onezhskiy Bay of the White Sea

Tolstikov,

Galakhina,

Belevich

2023

E3S Web of Conf.

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Comprehensive oceanological studies depending on the tidal phase are important for an objective assessment of the patterns of biogeochemical parameters in the White Sea. Rivers are the main contributors of pollutants from the watershed to the White Sea. The studies of the mouths flowing into the Onezhskiy Bay of the White Sea were carried out from June 20 to June 28, 2023. The distributions of hydrophysical, hydrochemical and biological parameters were obtained depending on the phase of the tidal cycle. The maximum of total phosphorus content was observed in the Nizhny Vyg River Mouth – 42 μg/l, the highest concentration of total nitrogen was in the Onega River Mouth – 0.37 mg N/l. In the mouth of the Kem’ River, concentration of ammonium nitrogen prevailed among inorganic forms, like directly in the river, which indicates anthropogenic impact. The highest values of chlorophyll-a were observed at the most desalinated station, in the Onega River the highest were detected – 2.20 mg/m3. The influence of the phases of the tidal cycle in the study area on the spatial and temporal variability of environmental characteristics was manifested in changes in temperature and salinity.

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Anthropogenic Transformations in the Mouth Area of Tributaries as Factors of Negative Impact on Lake Baikal

Cited by 3 publications

References 12 publications

Heavy Metal Content in Fish of the Barguzin River (Eastern Cisbaikalia) and Assessment of Potential Risks to Human Health

Heavy Metal Content in Fish of the Barguzin River (Eastern Cisbaikalia) and Assessment of Potential Risks to Human Health

Fatty Acid Changes in Nearshore Phytoplankton under Anthropogenic Impact as a Biodiversity Risk Factor for the World’s Deepest Lake Baikal

Comprehensive studies of river mouths flowing into the Onezhskiy Bay of the White Sea

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