A5016954212- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Ocean Acidification Effects and Responses
- Marine Bivalve and Aquaculture Studies
- Geology and Paleoclimatology Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Aquaculture Nutrition and Growth
- Groundwater and Isotope Geochemistry
- Water Quality and Pollution Assessment
- Per- and polyfluoroalkyl substances research
- Environmental Chemistry and Analysis
- Analytical chemistry methods development
- Microbial Community Ecology and Physiology
- Heavy metals in environment
- Analytical Chemistry and Chromatography
- Mercury impact and mitigation studies
Norwegian University of Science and Technology
2021-2024
University of Otago
2020-2023
The growth of phytoplankton in lakes is thought to be primarily controlled by macronutrient concentrations, but the availability trace metal micronutrients, such as iron (Fe), are increasingly recognised important regulators lake primary production. This study evaluates role Fe regulating different nutrient status New Zealand. results this unique year-long study, combining highly sensitive concentration analysis waters and particulates with advanced bioavailability speciation modelling,...
Abstract Light and iron availability are intertwined in controlling Southern Ocean primary production because several photosynthetic proteins require iron. Changes light can also affect phytoplankton species composition, which impacts nutrient cycling, carbon drawdown, food web structure. To investigate the interactive effects of on growth, photosynthesis, photoacclimation strategy, micronutrient stress‐induced protein expression, we conducted five bioassay experiments during spring waters...
The Western Antarctic Peninsula (WAP) is a rapidly changing region with receding sea-ice cover. This generally has increased phytoplankton productivity on the continental slope decrease observed in off-shelf waters located further northward. study aims to improve understanding of distribution iron (Fe) this climatically important oceanic during early retreat, as well impact ice cover Fe concentrations and importance its sources at beginning growth season. Five ocean transects were sampled...
Abstract. Organic ligands are a key factor determining the availability of dissolved iron (DFe) in high-nutrient low-chlorophyll (HNLC) areas Southern Ocean. In this study, organic speciation Fe is investigated along natural gradient western Antarctic Peninsula, from an ice-covered shelf to open ocean. An electrochemical approach, competitive ligand exchange – adsorptive cathodic stripping voltammetry (CLE-AdCSV), was applied. Our results indicated that surface water on associated with...
Abstract. Organic ligands are a key factor determining the availability of dissolved iron (DFe) in high nutrient low chlorophyll (HNLC) areas Southern Ocean. In this study, organic speciation Fe is investigated along natural gradient western Antarctic Peninsula, from an ice covered shelf to open ocean. An electrochemical approach, competitive ligand exchange – adsorptive cathodic stripping voltammetry (CLE-AdCSV) was applied. Our results indicated that surface water on associated with...
This study aimed to characterize Echinus esculentus gonads in terms of biometric parameters and nutritional quality at two sites Mid-Norway four different seasons. The chemical contamination the was also investigated for first time through evaluation 28 macro- trace elements 33 components from emerging persistent group per- polyfluoroalkyl substances (PFAS). spawning period determined summer, given that gonad index lowest this season both sites. Protein concentrations were constant (8%-10%)....