A5030621977- Isotope Analysis in Ecology
- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Geology and Paleoclimatology Research
- Marine Bivalve and Aquaculture Studies
- Marine Biology and Ecology Research
- Atmospheric aerosols and clouds
- Archaeology and ancient environmental studies
- Aquatic Invertebrate Ecology and Behavior
- Air Quality Monitoring and Forecasting
- Marine and coastal plant biology
- Vehicle emissions and performance
- Atmospheric Ozone and Climate
- Animal Ecology and Behavior Studies
- Marine and coastal ecosystems
- Environmental Toxicology and Ecotoxicology
- Marine and environmental studies
- Nuclear and radioactivity studies
- Radioactive contamination and transfer
- Graphite, nuclear technology, radiation studies
- Marine animal studies overview
- Fish Ecology and Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and fisheries research
Center for Physical Sciences and Technology
2016-2025
General Jonas Žemaitis Military Academy of Lithuania
2023
Vilnius University
2017-2020
Abstract. Dual carbon isotope analysis of marine aerosol samples has been performed for the first time demonstrating a potential in organic matter apportionment between three principal sources: marine, terrestrial (non-fossil) and fossil fuel due to unique isotopic signatures. The results presented here, utilising combinations dual analysis, provides conclusive evidence dominant biogenic fraction over biologically active oceans. In particular, NE Atlantic, which is also subjected notable...
Filamentous, nitrogen-fixing cyanobacteria form extensive summer blooms in the Baltic Sea. Their ability to fix dissolved N2 allows circumvent general nitrogen limitation, while also generating a supply of novel bioavailable for food web. However, fate fixed by remains unresolved, as does its importance secondary production Here, we synthesize recent experimental and field studies providing strong empirical evidence that cyanobacterial is efficiently assimilated transferred webs via two...
Abstract Cation engineering provides a route to control the structure and properties of hybrid halide perovskites, which has resulted in highest performance solar cells based on mixtures Cs, methylammonium, formamidinium. Here, we present multi-technique experimental theoretical study structural phase transitions, phases dipolar dynamics mixed methylammonium/dimethylammonium MA 1- x DMA PbBr 3 perovskites (0 ≤ 1). Our results demonstrate significant suppression enhanced disorder...
The isotopic niche has become an established concept in trophic ecology. However, the assumptions behind this approach have rarely been evaluated. Evidence is accumulating that physiological stress can affect both magnitude and inter-individual variability of signature consumers via alterations metabolic pathways. We hypothesized factors (inadequate nutrition, parasite infestations, exposure to toxic substances or varying oxygen conditions) might lead suboptimal performance altered stable...
Abstract Stable carbon isotope ratios in marine aerosol collected over the Southern Indian Ocean revealed δ 13 C values ranging from −20.0‰ to −28.2‰. The exhibited a strong correlation with fractional organic matter (OM) enrichment sea spray aerosol. base-level ratio of is characteristic an aged Dissolved Organic Matter (DOM) pool contributing relatively homogeneous background level DOM oceanic waters. range ratios, extending down −28.2‰, more variable, stronger, and fresher Particulate...
The potential for using stable isotope analysis in risk assessment of environmental contaminants is crucially dependent on the predictability trophic transfer isotopes food webs. relationship between contaminant levels and position consumers widely used to assess biomagnification properties various pollutants by establishing magnification factors (TMF). However, contaminant-induced variability isotopic composition biota poorly understood. Here, we investigated effects toxic exposure δ(15)N...
Abstract. In early spring the Baltic region is frequently affected by high-pollution events due to biomass burning in that area. Here we present a comprehensive study investigate impact of biomass/grass (BB) on evolution and composition aerosol Preila, Lithuania, during springtime open fires. Non-refractory submicron particulate matter (NR-PM1) was measured an Aerodyne chemical speciation monitor (ACSM) source apportionment with multilinear engine (ME-2) running positive matrix factorization...
Abstract Assessing historical environmental conditions linked to habitat colonization is important for understanding long‐term resilience and improving conservation restoration efforts. Such information lacking the seagrass Zostera marina , an foundation species across cold‐temperate coastal areas of Northern Hemisphere. Here, we reconstructed during last 14,000 years from sediment cores in two eelgrass ( Z. ) meadows along Swedish west coast, with main aims identify time frame describe...
Abstract. Recent changes in climate and environment, influenced by both global local factors, have had profound impacts on coastal ecosystem functioning trajectories. By examining archived samples from ongoing ecological monitoring efforts, particularly focusing bivalves like mussels oysters, we gain a valuable long-term perspective how ecosystems are responding at various scales. We conducted analyses carbon nitrogen content (C %, N %) as well elemental isotopic ratios (C:N, δ13C, δ15N) of...
While marine seagrass habitats are acknowledged as sinks for carbon and nutrients, much less is known about sequestration in brackish-water vegetation. Here, we quantify the amount of organic (Corg) total nitrogen (TN) shallow bay sediments (0-25 cm) brackish Baltic Sea assess how it varies with morphometric isolation from sea, catchment characteristics abundance The sedimentary Corg TN content per surface area varied across gradient (mean Corg: 2500-4600 g/m2; mean TN: 320-570 g/m2),...
Eutrophication and climate change are among the most severe long-standing environmental problems threatening a large variety of coastal habitats species in Baltic Sea elsewhere. Urgent adequate management actions needed to mitigate combined effects anthropogenic activities. The overall purpose this study is assess relative influence past future land-use on organic carbon (OC) total nitrogen (TN) accumulation sediments. Preliminary results from vegetated sediments (two monospecific Zostera...
Abstract Recent rapid changes in climate and environmental conditions have significantly impacted coastal ecosystem functioning. However, the complex interplay between global local effects makes it challenging to pinpoint primary drivers. In a multi‐ecosystem study, we analyzed pluri‐decadal trends of bivalve‐δ 13 C as recorder changes. These were correlated with large‐scale natural anthropogenic proxies identify whether biota responded effects. Our findings revealed decreasing all sea...
We applied stable carbon isotope ratio (13C/12C) and radiocarbon (14C) analysis for the quantification of three main aerosol sources (coal, biomass liquid fossil fuel derived emissions). Submicron samples (PM1) were collected from 27th October, 2014 to 19th January, 2015 at a suburban site Vilnius city (Lithuania). To determine non-fossil contributions submicron carbonaceous particles, 14C measurements total (TC) performed using single stage accelerator mass spectrometer (SSAMS, NEC, USA)....
Seagrass meadows store significant carbon stocks at a global scale, but land-use change and other anthropogenic activities can alter the natural process of organic (Corg) accumulation. Here, we assessed accumulation history two seagrass in Zanzibar (Tanzania) that have experienced different degrees disturbance. The meadow Stone Town has been highly exposed to urban development during 20th century, while Mbweni is located an area with relatively low impacts historical clearing adjacent...
ABSTRACT A set (n = 37) of new human bone radiocarbon accelerator mass spectrometry ( 14 C AMS) dates from 11 Lithuanian Late Roman Period–Migration Period cemeteries is presented and discussed in the light established schemes archaeological chronology. The focus paper on burials military social elite, which indicate emergence cultural traditions E–S W–Central Lithuania or immigration that took place during this time. allow us to suggest corrections dominant chronological pattern development region.
Stable nitrogen isotopes (δ15N) are used as indicators of trophic position (TP) consumers. Deriving TP from δ15N individual amino acids (AAs) is becoming popular in ecological studies, because lower uncertainty than based on bulk (TPbulk). This method would also facilitate biomagnification studies provided that isotope fractionation unaffected by toxic exposure. We compared TPAA and TPbulk estimates for a sediment-dwelling bivalve two coastal sites, pristine contaminated. Chemical analysis...
ABSTRACT In this paper we analyze the radiocarbon ( 14 C) concentration changes over whole operational period of Ignalina Nuclear Power Plant (INPP) including post-shutdown decommissioning. Environmental samples from vicinity INPP and a rural area as background pine tree rings were analyzed with single stage accelerator mass spectrometer (SSAMS). The analysis shows local influence 3 to 7 pMC. time span 1983 2015 is divided into three periods representing early late stages different C...
Trophic magnification factor (TMF) analysis employs stable isotope signatures to derive biomagnification potential for environmental contaminants. This approach relies on species δ15N values aligning with their trophic position (TP). This, however, may not always be true, because toxic exposure can alter growth and allocation patterns. Here, effects of PCB (mixture PCB18, PCB40, PCB128, PCB209) δ13C as well processes driving these were explored using the cladoceran Daphnia magna. A two-part...