Heavy metals in sediments of the Gulf of Finland : a review

Emelyanov, Emelyan M; Vallius, Henry; Kravtsov, V. A.

doi:10.5200/baltica.2017.30.05

Cited by 3 publications

(2 citation statements)

References 5 publications

(17 reference statements)

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“…Precipitation and rivers are considered to be the main sources of metal loading to the Baltic Sea [35]. The main source of the metal loading in the eastern Gulf of Finland is the runoff from the Neva River [36]. In our previous paper [17], we discuss in detail the dependence of Fe, Mn, and other metal concentrations on natural as well as human-induced conditions in the eastern Gulf of Finland.…”

Section: Correlations Between Metals In the Sediments The Pore Water ...mentioning

confidence: 99%

“…Compared with the southern Baltic Sea, the conditions in the GoF are characterized by lower temperature and salinity and a high influence of the Neva River inflow. The mixture of fresh and saline waters creates specific conditions which greatly influence the hydrology and chemical processes [36]. Considering the sensitivity of accumulation processes to the surrounding environment, we believe that in the case of habitats with diverse conditions, even if we deal with the same species of algae, threshold values should be calculated and used individually for every habitat.…”

Section: Bioconcentration Factor and Environmental Quality Standardmentioning

confidence: 99%

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Heavy Metal Content in Macroalgae as a Tool for Environmental Quality Assessment: The Eastern Gulf of Finland Case Study

Gubelit,

Shigaeva,

Kudryavtseva

et al. 2023

JMSE

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Macroalgae are widely used for bioindication and assessment; however, in the case of pollutants of different origin, it is still unclear which contaminants in thalli can be regarded as indicative because too many factors influence the ability of algae to uptake them. The present study is a part of an international HAZLESS project and was conducted in the eastern Gulf of Finland (GoF). The main goal of our study was the application of metal concentrations in macroalgae as a tool for environmental quality assessment. To achieve this goal, we calculated the threshold metal concentrations in macroalgae (Cladophora glomerata) and compared our obtained values with actual concentrations. We found significant Spearman correlations in May between metals in sediments and pore water (−0.73 for Zn, −0.62 for Cd, 0.85 for Pb) and also between metals in algae and metals in pore water (1 for Cu and Cd, 0.98 for Zn and Pb). In July, Pb in algae were significantly correlated with Pb in pore water (0.88). The application of the calculated environmental quality standard (EQSMPC) for macroalgae has shown moderate pollution by Cu and Pb in the coastal zone of the eastern GoF. This was confirmed by an assessment based on the comparisons of metal concentrations in water with Environmental Quality Standards for water (EQSw). However, differences in the bioaccumulation factor and EQSMPC between May and July have shown that it is necessary to compare samples taken during the same period every year for adequate results in long-term monitoring. Considering the sensitivity of accumulating processes to the surrounding environment, we believe that in the case of habitats with diverse conditions, even for the same species of algae, threshold values should be calculated and used individually for every habitat. Our results have shown that this approach can be widely used for an assessment of environmental quality via metal concentrations in opportunistic macroalgae and can be recommended for further use.

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Section: Correlations Between Metals In the Sediments The Pore Water ...mentioning

confidence: 99%

Section: Bioconcentration Factor and Environmental Quality Standardmentioning

confidence: 99%

Heavy Metal Content in Macroalgae as a Tool for Environmental Quality Assessment: The Eastern Gulf of Finland Case Study

Gubelit,

Shigaeva,

Kudryavtseva

et al. 2023

JMSE

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Can the “Green Tides” Affect the Metal Distribution in the Coastal Sediments? A Case Study in the Eastern Gulf of Finland, Baltic Sea

Gubelit

Polyak

Shigaeva

et al. 2020

Contemp. Probl. Ecol.

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Examining the performance of along-track multi-mission satellite altimetry – A case study for Sentinel-6

Heinoja,

Delpeche-Ellmann,

Ellmann

2023

Journal of Geodetic Science

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Satellite altimetry (SA) is one of the most valuable techniques that measure the sea level data at both the near-coast and offshore. There exists, however, multiple challenges and hindrances in determining and using accurate sea level data. The most pertinent is that evaluation of SA performance requires that all data sources (such as tide gauges (TG) and hydrodynamic models (HDMs)) refer to the same vertical datum. Thus, knowledge of the geoid (equipotential surface of the earth) is essential in linking different sources of sea level. Accordingly, this study examines performance of along-track data for three satellite missions (Sentinel-3A, Jason-3, and Sentinel-6A) to obtain realistic sea level variation and to determine the accuracy of the various missions in the complex area of the eastern Baltic Sea. The methodology consisted of utilizing SA, HDM, and TG data and a high-resolution geoid model. Results show that root-mean-square error (RMSE) varied for Jason-3 within a range of 1.68–50.14 cm, Sentinel 3A with a range of 2.8–46.27 cm, and Sentinel 6A with a range of 3.5–43.90 cm. Sentinel 6A was determined to be the most accurate and reliable satellite mission. Results also showed higher RMSE (15.7–46.2 cm) during (i) the seasonal sea ice month (e.g. March 2018); (ii) at locations of several islands (e.g. eastern section of Gulf); and (iii) at locations where rivers discharged into the Gulf (e.g. Nava, Kemi, Luga, and Neva rivers). These features tended to show up as peaks in the final results even though robust data processing for outliers were undertaken. These results suggests that improvements can still be made in the SA retrackers and also in the data-processing techniques utilized.

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Heavy metals in sediments of the Gulf of Finland : a review

Cited by 3 publications

References 5 publications

Heavy Metal Content in Macroalgae as a Tool for Environmental Quality Assessment: The Eastern Gulf of Finland Case Study

Heavy Metal Content in Macroalgae as a Tool for Environmental Quality Assessment: The Eastern Gulf of Finland Case Study

Can the “Green Tides” Affect the Metal Distribution in the Coastal Sediments? A Case Study in the Eastern Gulf of Finland, Baltic Sea

Examining the performance of along-track multi-mission satellite altimetry – A case study for Sentinel-6

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