A5060675209- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Ocean Acidification Effects and Responses
- Microbial Community Ecology and Physiology
- Isotope Analysis in Ecology
- Mercury impact and mitigation studies
- CO2 Sequestration and Geologic Interactions
- Heavy metals in environment
- Geochemistry and Elemental Analysis
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine Bivalve and Aquaculture Studies
- Environmental Toxicology and Ecotoxicology
- Methane Hydrates and Related Phenomena
- Water Quality Monitoring and Analysis
- Marine and fisheries research
- Marine and environmental studies
- Arctic and Antarctic ice dynamics
- Toxic Organic Pollutants Impact
- Groundwater flow and contamination studies
- Oceanographic and Atmospheric Processes
- Biomedical Text Mining and Ontologies
- Food Industry and Aquatic Biology
- Cognitive Science and Mapping
- Mine drainage and remediation techniques
- Marine animal studies overview
Norwegian University of Science and Technology
2015-2024
Vitensenteret i Trondheim
2022
NTNU Samfunnsforskning
2013
SINTEF
2012
Abstract. As part of the US-AMLR program in January-February 2006, 99 stations South Shetland Islands-Antarctic Peninsula region were sampled to understand variability hydrographic and biological properties related abundance distribution krill this area. Concentrations dissolved iron (DFe) total acid-leachable (TaLFe) measured upper 150 m at 16 these (both coastal pelagic waters) better resolve factors limiting primary production area downstream waters Scotia Sea. The concentrations DFe...
In the Southern Ocean near Antarctic Peninsula, Circumpolar Current (ACC) fronts interact with shelf waters facilitating lateral transport of shelf‐derived components such as iron into high‐nutrient offshore regions. To trace these and estimate mixing rates water, we used naturally occurring radium isotopes. Short‐lived isotopes were to quantify water entrainment while Fe/ 228 Ra ratios calculate Fe flux. summer 2006 found rapid significant export, namely, a dissolved flux 1.1 × 10 5 mol d...
Abstract. Based on an international workshop (Gothenburg, 14–16 May 2008), this review article aims to combine interdisciplinary knowledge from coastal and open ocean research iron biogeochemistry. The major scientific findings of the past decade are structured into sections natural artificial fertilization, inputs estuarine systems, colloidal organic matter, biological processes. Potential effects global climate change, particularly acidification, biogeochemistry discussed. synthesized...
Abstract The Southern Ocean is a major sink of anthropogenic CO 2 and an important foraging area for top trophic level consumers. However, iron limitation sets upper limit to primary productivity. Here we report on considerably dense late summer phytoplankton bloom spanning 9000 km in the open ocean eastern Weddell Gyre. Over its 2.5 months duration, accumulated up 20 g C m −2 organic matter, which unusually high waters. We show that, over 1997–2019, this was likely driven by anomalies...
Abstract. Rising atmospheric CO2 is acidifying the surface ocean, a process which expected to greatly influence chemistry and biology of future ocean. Following development iron-replete phytoplankton blooms in coastal mesocosm experiment at 350, 700, 1050 μatm pCO2, we observed significant increases dissolved iron concentrations, Fe(II) half-life times during after peak response enrichment concomitant lowering pH, suggesting increased bioavailability. If applicable open ocean this may...
Abstract. The impact of CO2 seepage on the solubility and distribution redox-sensitive metals iron, manganese, cobalt in seawater sediment pore water has been studied experiments laboratory-scale 0.6 m3 chambers. mobility Fe, Mn Co were investigated seawater, membrane filtered DGT samplers deployed during a 26 day study. During first phase experiment (0–16 days), total acid-leachable (pH 1) "dissolved" (<0.2 μm) concentrations (DFe, DMn DCo) increased significantly; ratios DFe, DCo...
Despite the lack of local anthropogenic mercury sources, methylated (MeHg) concentrations in Arctic biota are higher than from lower latitudes. The main entry route occurs during bioconcentration seawater monomethylmercury (MMHg) into phytoplankton. known seasonal changes biological activity region, little is about cycling total (THg) and MeHg Ocean. Here, we report THg sampled northwestern Barents Sea water column late winter spring. In upper 500 m, significantly spring (0.64 ± 0.09 pmol...
Investigations into Fe(II) cycling during two Southern Ocean mesoscale iron enrichment experiments, SOFeX and EIFeX, clearly show the importance of to speciation these experiments. In both cases added persisted significantly longer than its expected oxidation time indicating a significant Fe reduction process at work. During EIFeX diel studies showed strong photochemically induced cycle in production sunlit surface waters. Our results suggest that photochemical may also be important...
Climate change affects the marine environment at all levels of governance. At a global level, researchers expect projected increase in sea surface temperature to facilitate large changes food web, which turn will affect both fisheries and aquaculture. local government stakeholders want know whether how this their communities adaptive capacity light this. Research suggests that risk communication effects web suffers from stakeholders` short-term mentality narrow boundaries. This can lead an...
Marine sediment is a significant sink for the global pollutant mercury. In rapidly changing Arctic region, mercury (Hg) bioaccumulation in marine ecosystem remains prominent environmental issue. Here, we report surface (0-2 cm) concentrations of Hg and other toxic elements interest (Cr, Ni, Zn, Cu, As, Cd, Pb) northern Barents Sea Eurasian Basin. We observed average 65 ± 23 ng/g with highest concentration 116 Our calculated enrichment factors suggest low anthropogenic mercury, chromium,...
AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 6:11-27 (2014) - DOI: https://doi.org/10.3354/aei00114 Responses in microbial food web increased rates of nutrient supply a southern Chilean fjord: possible implications cage aquaculture Lasse Mork Olsen1,*, Klaudia L. Hernández2,3, Murat Van Ardelan4, Jose Luis Iriarte5, Nicolas Sánchez4, Humberto E....
An oceanographic survey around the South Shetland Islands (SSI) and Orkney (SOI) was conducted during January 2007 February 2008, respectively, as part of United States Antarctic Marine Living Resources program ecosystems surveys. At 27 stations, concentrations dissolved labile (DFe) total acid leachable (unfiltered, TaLFe) iron (Fe) were measured in upper 200 m (including coastal oceanic waters) to better resolve factors limiting primary production these regions. Northwest SSI, a region...
Coastal observing systems are typically nationally funded and built around national priorities. As a result, there presently significant differences between countries in terms of sustainability, capacity technologies, as well methods research Ocean coastal areas must now move toward an integrated, multidisciplinary multiscale system systems, where heterogeneity should be exploited to deliver fit-for-purpose products that answer the diversity complexity requirements from stakeholders...
Organic ligands play a key role controlling trace metal bioavailability in the world oceans, yet species-specific requirements determining whether certain iron forms can be metabolized largely remain unclear. Siderophores are considered relevant within this pool of keeping soluble. We used desferrioxamine B (DFB) to study siderophore effect on cultures Skeletonema costatum and Alexandrium catenella. The experimental approach semi-continuous additions iron(II) DFB over time, reaching final...
Abstract. Rising atmospheric CO2 is acidifying the surface ocean, a process which expected to greatly influence chemistry and biology of future ocean. Following development iron-replete phytoplankton blooms in coastal mesocosm experiment at 350, 700, 1050 μatm pCO2, we observed significant increases dissolved iron concentrations, Fe(II) half-life times during after peak response enrichment, suggesting increased bioavailability. If applicable open ocean this may provide negative feedback...
A potential CO2 seepage from sub-seabed storage may cause cascade effects in marine ecosystems if it influences a process that has key-function the complex ecosystem. Therefore not only primary (CO2 increase and pH decreases) but also secondary (change mobility, bioavailability of trace heavy metals organic toxins) should be studied. These impacts are still poorly understood. Here we present preliminary results an experimental study titanium pressure tank on impact elements mobility...
Abstract. The speciation of dissolved iron (DFe) in the ocean is widely assumed to consist almost exclusively Fe(III)-ligand complexes. Yet most aqueous environments a poorly defined fraction DFe also exists as Fe(II), which uncertain. Here we deploy flow injection analysis measure situ Fe(II) concentrations during series mesocosm/microcosm/multistressor experiments coastal addition decay rate this when moved into dark. During five Svalbard and Patagonia, where (0.2 µm) Fe were quantified...