A5082427920- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Methane Hydrates and Related Phenomena
- Soil and Water Nutrient Dynamics
- Medical Imaging Techniques and Applications
- Ocean Acidification Effects and Responses
- Microbial Community Ecology and Physiology
- Geology and Paleoclimatology Research
- Marine Bivalve and Aquaculture Studies
- Oceanographic and Atmospheric Processes
- Groundwater and Isotope Geochemistry
- Aquatic Ecosystems and Phytoplankton Dynamics
- Isotope Analysis in Ecology
- Hydrocarbon exploration and reservoir analysis
- Advanced Radiotherapy Techniques
- Geochemistry and Elemental Analysis
- Wastewater Treatment and Nitrogen Removal
- Paleontology and Stratigraphy of Fossils
- Mercury impact and mitigation studies
- Aquatic Invertebrate Ecology and Behavior
- Atmospheric and Environmental Gas Dynamics
- Marine and environmental studies
- Advanced MRI Techniques and Applications
- Analytical Chemistry and Sensors
- Underwater Vehicles and Communication Systems
University of Gothenburg
2015-2024
Chalmers University of Technology
1984-1998
University of Pennsylvania
1963
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 suitability of total carbonate production instead oxygen consumption as a measure benthic respiration has been investigated. In situ fluxes carbonate, oxygen, calcium, alkalinity, nutrients, and sulfide across the sediment‐water interface were measured in diver‐operated flux chambers. Two chambers run parallel to test influence pH levels on production. one, kept constant near ambient levels; other, was allowed deplete lower pH. We found that corrected for CaCO 3...
Coastal sediments are rich in conductive particles, possibly affecting microbial processes for which acetate is a central intermediate. In the methanogenic zone, consumed by methanogens and/or syntrophic acetate-oxidizing (SAO) consortia. SAO consortia live under extreme thermodynamic pressure, and their survival depends on successful partnership. Here, we demonstrate that particles enable partnership between bacteria (i.e., Geobacter spp.) (Methanosarcina from coastal of Bothnian Bay Baltic...
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...
Abstract. Location, specific topography, and hydrographic setting together with climate change strong anthropogenic pressure are the main factors shaping biogeochemical functioning thus also ecological status of Baltic Sea. The recent decades have brought significant changes in First, rising nutrient loads from land second half 20th century led to eutrophication spreading hypoxic anoxic areas, for which permanent stratification water column limited ventilation deep-water layers made...
On the assumption that lack of oxygen will cause activity benthic infauna to cease and thereby limit solute transport accomplished by molecular diffusion, we have measured flux dissolved silicate across sediment‐water interface sediments incubated in situ under parallel chambers. In one chamber concentration was allowed go zero, other pH remained at ambient values. As long as present chambers, summer fall fluxes were 2– 10 times those calculated from porewater profiles assuming...
A simple, one‐dimensional, transport‐reaction model of oxygen uptake by sediments during incubation experiments assumes zero‐order reaction kinetics for removal in the pore water and takes apparent diffusive limitation posed benthic boundary layer into account. Model calculations are excellent agreement with experimental data obtained situ flux chamber Gullmarsfjorden, Sweden, fall (water temp, 10°C) winter (−1°C). The “resistance,” represented a mean sublayer thickness, was estimated series...
The new approach to model the oxygen dependent phosphate release by implementing formulations of penetration depths (OPD) and mineral bound inorganic phosphorus pools Swedish Coastal Ocean Biogeochemical (SCOBI) is described. dynamics concentrations in Baltic proper sediment are studied during period 1980–2008 using SCOBI coupled 3D-Rossby Centre model. Model data compared observations from monitoring stations experiments. impact consumption on determination OPD found be largest coastal...
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...
Summary Cable bacteria have been reported in sediments from marine and freshwater locations, but the environmental factors that regulate their growth natural settings are not well understood. Most prominently, physiological limit of cable terms oxygen availability remains poorly constrained. In this study, we investigated presence, activity diversity relation to a gradient bottom water oxygenation depth transect Eastern Gotland Basin (Baltic Sea). were identified by FISH at oxic transiently...
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 Fjords are net carbon sinks with high organic (OC) burial rates; however, the key drivers of OC in these systems not well constrained. To study role water column redox condition and composition on preservation fjord sediments, we determined accumulation rates (OCAR), source, degradation three Swedish fjords variable conditions (long‐term oxic, seasonally hypoxic, long‐term anoxic). Average OCARs were between within studied (2–122 g m −2 yr −1 ), but highest at mouth for each fjord....
A new in situ instrument for two‐dimensional mapping of oxygen coastal sediments is presented. The measuring principle described, and potential mechanical disturbances, solute particle smearing associated with the measurements, calibration routines are evaluated. first measurements obtained two different benthic communities In a shallow photosynthetic sediment (1 m water depth), an extensive horizontal temporal variation O 2 distribution caused by photosynthesis irrigating fauna was...