Kari K. Lehtonen
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View article: Effects of algal sedimentation and Monoporeia affinis on nutrient fluxes, pore water profiles and denitrification in sediment microcosms
Effects of algal sedimentation and Monoporeia affinis on nutrient fluxes, pore water profiles and denitrification in sediment microcosms Open
A flow-through experiment was conducted to study the effects of a simulated algal sedimentation (8.0 g C m-2) and the amphipod Monoporeia affinis (5000 ind. m-2) using well-oxidised sediment from the Gulf of Bothnia. Pore water nutrient pr…
View article: The Use of Biomarkers in Monitoring and Assessment of Chemical Contamination in the Baltic Sea
The Use of Biomarkers in Monitoring and Assessment of Chemical Contamination in the Baltic Sea Open
Chemical pollution affects the health of marine biota, key functions of the ecosystem, and endangers its biodiversity. The current environmental monitoring and assessment approach is based on chemical and ecological measurements, while the…
View article: Biomarker Responses In The Mussel (Mytilus Edulis) And The Flounder (Platichthys Flesus) In The Klaipeda-Butinge Area (Baltic Sea)
Biomarker Responses In The Mussel (Mytilus Edulis) And The Flounder (Platichthys Flesus) In The Klaipeda-Butinge Area (Baltic Sea) Open
No abstracts are to be cited without prior reference to the author.In spring and autumn 2001 and 2002, acetylcholinesterase activity, metallothionein level, micronuclei, and apoptosis were measured in blue mussel and flounder (additionally…
View article: Biomarker Responses In The Blue Mussel (Mytilus Edulis) And In Eelpout (Zoarces Viviparus) In The Western Baltic Sea
Biomarker Responses In The Blue Mussel (Mytilus Edulis) And In Eelpout (Zoarces Viviparus) In The Western Baltic Sea Open
No abstracts are to be cited without prior reference to the author.Two aims of the EU-funded BEEP project were to establish a baseline of selected biomarker signals in different areas of the Baltic Sea according to pollutant and salinity g…
View article: Assessing Biological Effects of Contaminants in the Gulf of Finland, Northeastern Baltic Sea, Using Sediment Biotests with Amphipods (Monoporeia affinis) and Biomarker Responses in Clams (Macoma balthica)
Assessing Biological Effects of Contaminants in the Gulf of Finland, Northeastern Baltic Sea, Using Sediment Biotests with Amphipods (Monoporeia affinis) and Biomarker Responses in Clams (Macoma balthica) Open
The Gulf of Finland, in the northeastern Baltic Sea, is experiencing ongoing adverse effects due to human activities, leading to a decline in the quality of the marine environment [...]
View article: Transformation of phenylarsenic chemical warfare agents and their effect on bacterial communities in Baltic Sea sediment
Transformation of phenylarsenic chemical warfare agents and their effect on bacterial communities in Baltic Sea sediment Open
During the World Wars large quantities of phenylarsenic chemical warfare agents (CWAs) were dumped in the Baltic Sea. Many transformation products of these chemicals have been identified, but the pathways that produce the found chemicals h…
View article: Biomarker responses in mussels (Mytilus trossulus) from the Baltic Sea exposed to water-accommodated fraction of crude oil and a dispersant at different salinities
Biomarker responses in mussels (Mytilus trossulus) from the Baltic Sea exposed to water-accommodated fraction of crude oil and a dispersant at different salinities Open
Oil spills pose significant environmental risks, particularly in cold seas. In the Baltic Sea, the low salinity (from 0 to 2 up to 18) affects the behaviour of the spilled oil as well as the efficiency and ecological impacts of oil spill r…
View article: Chemical munitions in the Baltic Sea – growing evidence of environmental impact
Chemical munitions in the Baltic Sea – growing evidence of environmental impact Open
Over 38000 tons of chemical munitions were dumped in the Baltic Sea after World War II. They rest on the bottom of the Gotland and Bornholm Deeps. Studies performed between 2011 and 2019 show that those munitions are largely corroded, and …
View article: Influence of Environmental Variables on Biochemical Biomarkers in the Amphipod Monoporeia affinis from the Gulf of Riga (Baltic Sea)
Influence of Environmental Variables on Biochemical Biomarkers in the Amphipod Monoporeia affinis from the Gulf of Riga (Baltic Sea) Open
The complexity of the marine environment and the increasing anthropogenic pressure create a necessity to expand existing monitoring approaches. The main goal of this study was to depict the effects of selected, seasonally varying environme…
View article: Exposure to leachates from post-consumer plastic and recycled rubber causes stress responses and mortality in a copepod Limnocalanus macrurus
Exposure to leachates from post-consumer plastic and recycled rubber causes stress responses and mortality in a copepod Limnocalanus macrurus Open
Effects of household post-consumer plastics and tyre rubber on a Baltic Sea copepod Limnocalanus macrurus were assessed. Fragments of commercial recycled low-density polyethylene vegetable bags and rubber originating from recycled car tyre…
View article: Working Group on Biological Effects of Contaminants (WGBEC)
Working Group on Biological Effects of Contaminants (WGBEC) Open
The Working Group on Biological Effects of Contaminants (WGBEC) investigates the biological effects
\nof contaminants in the marine environment. The group provides research and increases the
\nunderstanding of contaminant interactions an…
View article: Acute aquatic toxicity of arsenic-based chemical warfare agents to Daphnia magna
Acute aquatic toxicity of arsenic-based chemical warfare agents to Daphnia magna Open
Sea dumping of chemical warfare (CW) took place worldwide during the 20th century. Submerged CW included metal bombs and casings that have been exposed for 50-100 years of corrosion and are now known to be leaking. Therefore, the arsenic-b…
View article: Biomarker responses and accumulation of polycyclic aromatic hydrocarbons in Mytilus trossulus and Gammarus oceanicus during exposure to crude oil
Biomarker responses and accumulation of polycyclic aromatic hydrocarbons in Mytilus trossulus and Gammarus oceanicus during exposure to crude oil Open
In the brackish water Baltic Sea, oil pollution is an ever-present and significant environmental threat mainly due to the continuously increasing volume of oil transport in the area. In this study, effects of exposure to crude oil on two c…
View article: Mussel Caging and the Weight of Evidence Approach in the Assessment of Chemical Contamination in Coastal Waters of Finland (Baltic Sea)
Mussel Caging and the Weight of Evidence Approach in the Assessment of Chemical Contamination in Coastal Waters of Finland (Baltic Sea) Open
Contamination status of coastal areas of Finland (northern Baltic Sea) markedly affected by anthropogenic activities (harbors, shipyards and maritime activity, industry, municipal and agricultural inputs, legacy contamination) was assessed…
View article: Sediment biotesting in the Baltic Sea
Sediment biotesting in the Baltic Sea Open
Sediments contaminated by human activities usually contain a mixture of chemicals that produce unforeseen combined toxic effects in organisms. Thus, traditional risk assessments based on the concentrations of chemicals are unlikely to prod…