A5056521862- Marine and coastal ecosystems
- Soil and Water Nutrient Dynamics
- Marine Biology and Ecology Research
- Thermography and Photoacoustic Techniques
- thermodynamics and calorimetric analyses
- Chemical Thermodynamics and Molecular Structure
- Aquatic Ecosystems and Phytoplankton Dynamics
- Groundwater and Isotope Geochemistry
- Methane Hydrates and Related Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Aquatic Invertebrate Ecology and Behavior
- Advanced Chemical Sensor Technologies
- Wastewater Treatment and Nitrogen Removal
- Heavy metals in environment
- Ocean Acidification Effects and Responses
- Analytical Chemistry and Sensors
- Marine Bivalve and Aquaculture Studies
- Environmental Monitoring and Data Management
- Surface Roughness and Optical Measurements
- Geochemistry and Elemental Analysis
- Water Quality Monitoring Technologies
- Electrochemical Analysis and Applications
- Mercury impact and mitigation studies
- Underwater Vehicles and Communication Systems
- Photoacoustic and Ultrasonic Imaging
University of Gothenburg
2014-2023
Institute of Natural Sciences
2023
Moscow State University
2002-2009
Lomonosov Moscow State University
2001-2008
Institute of Oceanology. PP Shirshov Russian Academy of Sciences
2004-2008
Institute of Technical Chemistry
2008
Karlsruhe Institute of Technology
2008
Abstract. In this paper we provide an overview of new knowledge on oxygen depletion (hypoxia) and related phenomena in aquatic systems resulting from the EU-FP7 project HYPOX ("In situ monitoring hypoxic ecosystems coastal open seas, landlocked water bodies", http://www.hypox.net). view anticipated loss due to eutrophication climate change, was set up improve capacities monitor hypoxia as well understand its causes consequences. Temporal dynamics spatial patterns were analyzed field studies...
The aim of the study was to assess effect seaweed cultivation on coastal environment. We analysed a multitude environmental parameters using an asymmetrical before after control impact (BACI) design, comparing farm (impact) with multiple unaffected locations (controls). had significant positive benthic infauna (p<0.05) and found attract 17 mobile faunal 7 other species, indicating that farmed crop may provide habitat species. A light attenuation approximately 40% at 5m depth noted peak...
In a 2.5-year-long environmental engineering experiment in the By Fjord, surface water was pumped into deepwater where frequency of renewals increased by factor 10. During experiment, became long-term oxic, and nitrate dominating dissolved inorganic nitrogen component. The amount phosphate column decreased 5 due to increase flushing reduction leakage from sediments when sediment oxidized. Oxygenation did not toxic metals organic pollutants. bacterial community first show changes after...
In situ incubations of sediment with overlying water provide valuable and consistent information about benthic fluxes processes at the sediment-water interface. this paper, we describe our experiences a variety applications from last 14 years 308 deployments Gothenburg chamber lander systems. We give examples how use sensor measurements for leakage control, in volume determination, control syringe sampling times, resuspension stirring quality. present incubation data oxygen, dissolved...
Abstract. Sedimentary recycling of phosphorus is a key aspect coastal eutrophication. Here, we present data on benthic fluxes dissolved inorganic (DIP) from the Baltic Sea, an area with long eutrophication history. The presented dataset contains 499 individual measured in situ three types chamber landers at 59 stations over 20 years, and cover most Sea sub-basins (Hylén et al., 2025; https://doi.org/10.5281/zenodo.14812160). further information about bottom-water oxygen (O2) concentrations,...
At the end of 2014, a major Baltic inflow (MBI) brought oxygenated, salty water into proper and reached long-term anoxic Eastern Gotland Basin (EGB) by March 2015. In July 2015, we measured benthic fluxes phosphorus (P), nitrogen (N) silicon (Si) nutrients dissolved inorganic carbon (DIC) in situ using an autonomous lander at deep sites (170-210 m) EGB, where bottom oxygen concentration was 30-45 µM. The same methodology used to measure 2008-2010, but then under conditions. high efflux...
Abstract. Over the last decades, impact of human activities on global nitrogen (N) cycle has drastically increased. Consequently, benthic N cycling mainly been studied in anthropogenically impacted estuaries and coasts, while oligotrophic systems its understanding is still scarce. Here we report solute fluxes rates denitrification, anammox, dissimilatory nitrate reduction to ammonium (DNRA) by situ incubations with chamber landers during two cruises Gulf Bothnia (GOB), a cold, basin located...
Organic carbon (OC) burial efficiency, which relates the OC rate to respiration in seafloor, is a critical parameter reconstruction of past marine primary productivities. The current accepted theory that sediments underlying oxygen-deficient (anoxic) bottom waters have low rates and high efficiencies. By combining novel situ measurements anoxic basins with reaction-transport modelling, we demonstrate much higher than commonly assumed. A major proportion concentrated top millimeter—the...
Mussel farming has been proposed as a mechanism to mitigate eutrophication in coastal waters. However, localizing the intensive filtration of organic matter by mussels can cause concomitant enrichment sediments below farms, which may influence biogeochemical processes and fates nutrients system. In context mitigating eutrophication, it is important quantify sedimentary changes induced at early life stages mussel farms. Accordingly, this study investigated how newly re-established farm...
The review surveys the main lines of research in thermooptical spectroscopy related directly or indirectly to analytical chemistry. advantages and drawbacks methods are considered. Particular attention is given coupling chromatography, flow analysis techniques, capillary electrophoresis, etc. Prospects for development discussed. bibliography includes 606 references.
Continental margin sediments receive most of the particulate organic carbon (POC) deposited on global seafloor, making them crucial locations in cycle. However, complex environments coastal oceans make it challenging to predict fate sedimentary (OC) these areas. Here we use data from 21 sites Baltic Sea, representing different biological and physiochemical regimes, explore controls OC cycling. To this end, combine situ measured benthic fluxes dissolved inorganic (DIC; proxy for oxidation)...
Abstract Coastal and shelf sediments are central in the global nitrogen (N) cycle as important sites for removal of fixed N. However, this ecosystem service can be hampered by ongoing deoxygenation many coastal areas. Natural reoxygenation could reinstate anoxic where N is removed efficiently. To investigate further, we studied benthic cycling previously long‐term sediments, following a large intrusion oxygenated water to Baltic Sea. During three campaigns 2016–2018, measured situ...
Abstract Oceanic methane (CH 4 ) budgets lack data from high‐latitude fjords that often behave as intermittently anoxic ecosystems with potentially high emissions. We conducted 15 expeditions and 49 in situ lander deployments an Scandinavian fjord between 2009 2021. Benthic fluxes were highest at the deepest site (average 516 μ mol CH m −2 d −1 ), supporting bottom water exceeding 5000 nM. Natural engineered mixing events displaced methane‐rich waters, enhancing upper concentrations driving...
Benthic nutrient dynamics in the coastal basin Kanholmsfjärden, NW Baltic proper, were studied by situ flux measurements and sediment samplings 2010–2013. The benthic release of NH4 DIP from anoxic sediments Kanholmsfjärden calculated to renew standing stock inventories DIN overlying water roughly 1 year. Starting summer 2012, mixing oxygen-rich into deep part temporarily improved oxygen conditions water. During year oxygenated period, total phosphorus inventory surficial increased 0.4 g P...
A theoretical model for cw laser-induced thermal lens spectrometry of optically transparent surface-absorbing solids is developed. In the model, sample represented as a set discrete layers with certain thicknesses and light absorptivities. The bloomed thermo-optical element in described summation heat-flux functions all layers. employs simple mathematical expressions can be used both steady-state time-resolved experiments. Good coincidence experimental theoretically predicted signal...
Recycling and burial of sediment phosphorus were studied in the By Fjord, western Sweden, during the years 2009 to 2010 using autonomous benthic landers sampling. The Fjord is a small fjord with a shallow sill at its narrow mouth, which limits water exchange fjord’s basin water. basin is exchanged only every 3 5 below sill level anoxic or sulfidic between renewals. Five sites examined Fjord; three shallow above level oxic bottom waters two deeper bottom waters. Contents organic carbon...
Abstract. Phosphorus fertilisation (eutrophication) is expanding oxygen depletion in coastal systems worldwide. Under low-oxygen bottom water conditions, phosphorus release from the sediment elevated, which further stimulates primary production. It commonly assumed that re-oxygenation could break this “vicious cycle” by increasing sedimentary retention. Recently, a deep-water inflow into Baltic Sea created natural situ experiment allowed us to investigate if temporary retention of dissolved...