Sediment microbial activity and its relation to environmental variables along the eastern Gulf of Finland coastline

Polyak, Yulia; Shigaeva, T. D.; Gubelit, Yulia I.; Бакина, Л. Г.; Kudryavtseva, V. A.; Polyak, Mark

doi:10.1016/j.jmarsys.2016.11.017

Cited by 15 publications

(6 citation statements)

References 51 publications

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“…Field observations from the eastern Gulf of Finland demonstrate the effects of metals and oil contamination on sediment microbial activity (Polyak et al, 2017). Experimental research on sediment from the Baltic Sea showed that in sediments exposed to cadmium (Cd) at environmentally relevant concentrations and varying oxygen conditions including hypoxia, Cd affected microbial denitrification (Broman et al, 2019).…”

Section: Effects On Biogeochemical Processes In Sedimentmentioning

confidence: 99%

Biogeochemical functioning of the Baltic Sea

et al. 2022

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Abstract. Location, specific topography, and hydrographic setting together with climate change and strong anthropogenic pressure are the main factors shaping the biogeochemical functioning and thus also the ecological status of the Baltic Sea. The recent decades have brought significant changes in the Baltic Sea. First, the rising nutrient loads from land in the second half of the 20th century led to eutrophication and spreading of hypoxic and anoxic areas, for which permanent stratification of the water column and limited ventilation of deep-water layers made favourable conditions. Since the 1980s the nutrient loads to the Baltic Sea have been continuously decreasing. This, however, has so far not resulted in significant improvements in oxygen availability in the deep regions, which has revealed a slow response time of the system to the reduction of the land-derived nutrient loads. Responsible for that is the low burial efficiency of phosphorus at anoxic conditions and its remobilization from sediments when conditions change from oxic to anoxic. This results in a stoichiometric excess of phosphorus available for organic-matter production, which promotes the growth of N2-fixing cyanobacteria and in turn supports eutrophication. This assessment reviews the available and published knowledge on the biogeochemical functioning of the Baltic Sea. In its content, the paper covers the aspects related to changes in carbon, nitrogen, and phosphorus (C, N, and P) external loads, their transformations in the coastal zone, changes in organic-matter production (eutrophication) and remineralization (oxygen availability), and the role of sediments in burial and turnover of C, N, and P. In addition to that, this paper focuses also on changes in the marine CO2 system, the structure and functioning of the microbial community, and the role of contaminants for biogeochemical processes. This comprehensive assessment allowed also for identifying knowledge gaps and future research needs in the field of marine biogeochemistry in the Baltic Sea.

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Section: Effects On Biogeochemical Processes In Sedimentmentioning

confidence: 99%

Biogeochemical functioning of the Baltic Sea

et al. 2022

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“…Enzyme activity was expressed in μmol TPF•g -1 DM of sediment•24 h -1 High AnB counts and their activity in the discussed object resulted most probably from the large amounts of organic matter deposited by tributaries. It also results from a study by Polyak et al (2017) [32], in which the DHA level is dependent on organic matter content. When analysing enzymatic activity of surface sediments in the Gulf of Finland, those authors showed that the activity of dehydrogenases, being solely intracellular enzymes, shows the intensity of respiratory metabolism of the microbial population, and as a result it is treated as a measure of organic matter content in a given environment.…”

Section: Resultsmentioning

confidence: 68%

Seasonal Variability in Chemical and Microbiological Status of Bottom Sediments in Lake Rusałka at Removal of Cyanobacterial Blooms from its Surface

Rybacki¹,

Wolna-Maruwka²,

Osuch³

et al. 2020

Pol. J. Environ. Stud.

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The aim of this study was to collect data on the variability of dissolved oxygen content, pH and conductivity in waters of Lake Rusałka and the microbiological status of its bottom sediments following mechanical removal of the cyanobacterial blanket. Results indicate that mechanical removal of the bloom blanket from the lake surface accelerates oxygenation of its waters and growth of aerobic bacteria, mineralizing the bottom sediments and reducing pH.

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“…Effects on biogeochemical processes in sediment. Field observations from the eastern Gulf of Finland demonstrate the effects of metals and oil contamination on sediment microbial activity (Polyak et al, 2017). Experimental research on sediment from the Baltic Sea showed that in sediments exposed to cadmium (Cd) at environmentally relevant concentrations and varying oxygen conditions including hypoxia, Cd affected microbial denitrification (Broman et al, 2019).…”

Section: Impact Of Contaminants On Biogeochemical Processesmentioning

confidence: 99%

Baltic Earth Assessment Report on the biogeochemistry of the Baltic Sea

Kuliński

Rehder

Asmala

et al. 2021

Preprint

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Abstract. Location, specific topography and hydrographic setting together with climate change and strong anthropogenic pressure are the main factors shaping the biogeochemical functioning and thus also the ecological status of the Baltic Sea. The recent decades have brought significant changes in the Baltic Sea. First, the rising nutrient loads from land in the second half of the 20th century led to eutrophication and spreading of hypoxic and anoxic areas, for which permanent stratification of the water column and limited ventilation of deep water layers made favourable conditions. Since the 1980s the nutrient loads to the Baltic Sea have been continuously decreasing. This, however, has so far not resulted in significant improvements in oxygen availability in the deep regions, which has revealed a slow response time of the system to the reduction of the land-derived nutrient loads. Responsible for that is the low burial efficiency of phosphorus at anoxic conditions and its remobilization from sediments when conditions change from oxic to anoxic. This results in a stoichiometric excess of phosphorus available for organic matter production, which promotes the growth of N2-fixing cyanobacteria and in turn supports eutrophication. This assessment reviews the available and published knowledge on the biogeochemical functioning of the Baltic Sea. In its content, the paper covers the aspects related to changes in carbon, nitrogen and phosphorus (C, N and P) external loads, their transformations in the coastal zone, changes in organic matter production (eutrophication) and remineralization (oxygen availability), and the role of sediments in burial and turnover of C, N and P. In addition to that, this paper focuses also on changes in the marine CO2 system, structure and functioning of the microbial community and the role of contaminants for biogeochemical processes. This comprehensive assessment allowed also for identifying knowledge gaps and future research needs in the field of marine biogeochemistry in the Baltic Sea.

show abstract

Sediment microbial activity and its relation to environmental variables along the eastern Gulf of Finland coastline

Cited by 15 publications

References 51 publications

Biogeochemical functioning of the Baltic Sea

Biogeochemical functioning of the Baltic Sea

Seasonal Variability in Chemical and Microbiological Status of Bottom Sediments in Lake Rusałka at Removal of Cyanobacterial Blooms from its Surface

Baltic Earth Assessment Report on the biogeochemistry of the Baltic Sea

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