A5091792883- Heavy metals in environment
- Mercury impact and mitigation studies
- Isotope Analysis in Ecology
- Marine and coastal ecosystems
- Geochemistry and Elemental Analysis
- Fish Ecology and Management Studies
- Aquatic and Environmental Studies
- Soil and Water Nutrient Dynamics
- Microbial bioremediation and biosurfactants
- Marine Bivalve and Aquaculture Studies
- Environmental Toxicology and Ecotoxicology
- Toxic Organic Pollutants Impact
- Marine Biology and Ecology Research
- Recycling and Waste Management Techniques
- Marine and fisheries research
- Microplastics and Plastic Pollution
- Marine and environmental studies
- Groundwater and Isotope Geochemistry
- Oceanographic and Atmospheric Processes
- Geochemistry and Geologic Mapping
- Water Quality and Pollution Assessment
- Effects and risks of endocrine disrupting chemicals
- biodegradable polymer synthesis and properties
- Trace Elements in Health
- Wastewater Treatment and Nitrogen Removal
Daugavpils University
2021-2024
Latvian Institute of Aquatic Ecology
2005-2024
University of Latvia
2003-2005
Experimental studies of intact sediment cores from the Gulf Riga, Baltic Sea, were conducted to estimate response nutrient fluxes various near-bottom water oxygen conditions. The experiment was performed in laboratory using a batch-mode assay type system on held at 4°C and concentrations maintained 1, 2, 3, 4 5 mg l−1. results subsequently used optimise fit denitrification sub-model Riga basin. Sediment- phosphate low directed out sediments under all treatments, demonstrating general...
Marine ecosystems face a significant ecological challenge due to the introduction and cycling of hazardous substances. The recent stabilization concentrations specific substances, which were previously decreasing, indicates ongoing processes within ecosystem. These continue make these substances available food chain, even following implementation restrictions elimination known anthropogenic sources. present study investigated transfer mercury, PBDEs, PCBs their congeners via trophic by...
The polybrominated diphenyl ethers (PBDEs) are bioaccumulative, persistent, and toxic. They have a high risk of emission into the environment via volatile losses diffuse sources, such as commercial product disposal or use sewage sludge. PBDEs’ congeners were analyzed in municipal waste water treatment plant (WWTP) sludge, river lake water, sediment, fish samples, to investigate concentrations urban natural locations. sum eight PBDE congener (∑8PBDE 28, 47, 99, 100, 153, 154, 183, 209) WWTP...
Abstract The ratio of stable carbon and nitrogen isotopes in the suspended particulate matter has been widely used to study processes occurring marine ecosystem. At same time, signals provided by isotope ratios coastal ecosystems can be difficult interpret, due several, often contradictory taking place simultaneously. In this study, we hypothesized that isotopic variation is predominantly affected seasonally phytoplankton species succession Gulf Riga, Baltic Sea. Cyclical seasonal patterns...
Abstract Background Eurasian perch ( Perca fluviatilis ) is an ecologically significant fish species in the Baltic Sea and has been recognized as a suitable organism to measure concentrations of mercury (Hg) contamination. The adult occupy high trophic position; therefore, levels hazardous substances tend bioaccumulate their tissues. However, ability inhabit wide range feeding ground raises concerns about adequacy monitoring data relation representativeness measured Hg at specific locations....
Concentrations of metallothioneins (MT) were analysed in bivalve molluscs Anodonta spp. and Unio from 6 lakes watercourses Latvia with different anthropogenic pressure. The aim the study was to find relationship between MT concentrations heavy metals sediments. showed no significant differences MT. High (Cd, Pb, Hg, Cu, Zn) detected deepest parts polluted water bodies, however their significantly decreased near shore sediments inhabited by molluscs. Only Zn tends accumulate molluscs,...
Mercury Pollution Exploration in Latvia with High-Sensitivity Zeeman Atomic Absorption Spectrometry This research presents Hg pollution measurements performed sensitive method using AAS analyzer RA-915+ and necessary attachments. Air Riga city water samples from a number of rivers lakes were analyzed for presence low-level concentrations. Ombrotrophic bog peat was to get insight into long-term trends. Environment the sites sampled is relatively clean according results obtained, but there are...
Abstract The ability of Cd and other trace metals to be incorporated in living phytoplankton cells has been widely used explain its dynamic marine ecosystem. However, the discrepancy between results from water column studies those sediments remain unexplained. This strongly suggests a need for study with more interconnected approach identification main governing factors element dynamics. Therefore, we conducted this study, which linked sedimentary records elements particular emphasis on...
Abstract BackgroundEurasian Perch ( Perca fluviatilis ) is one of ecologically significant fish species in the Baltic Sea and has been recognized as a suitable organism to measure concentrations hazardous substances that characterize levels local pollution (e.g. heavy metals or persistent organic pollutants). However, ability inhabit wide range feeding grounds raises concerns about adequacy monitoring data relation representativeness measured at specific locations. Accounting migratory...