Blar i NIVA Open Access Archive på forfatter "Borgå, Katrine"
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Isotopic niche differs between seal and fish-eating killer whales (Orcinus orca) in northern Norway
Jourdain, Eve; Andvik, Clare Margaret; Karoliussen, Richard; Ruus, Anders; Vongraven, Dag; Borgå, Katrine (Peer reviewed; Journal article, 2020)Ecological diversity has been reported for killer whales (Orcinus orca) throughout the North Atlantic but patterns of prey specialization have remained poorly understood. We quantify interindividual dietary variations in ... -
Land-cover, climate and fjord morphology drive differences in organic matter and nutrient dynamics in two contrasting northern river-fjord systems
Schultze, Sabrina; Andersen, Tom; Hessen, Dag Olav; Ruus, Anders; Borgå, Katrine; Poste, Amanda (Peer reviewed; Journal article, 2022)Climate and land-use changes are leading to impacts on individual ecosystems as well as shifts in transfer dynamics between interconnected systems. At the land-ocean interface, changes in riverine inputs of organic matter ... -
Maternal transfer and occurrence of siloxanes, chlorinated paraffins, metals, PFAS and legacy POPs in herring gulls (Larus argentatus) of different urban influence
Knudtzon, Nina Cathrine; Thorstensen, Helene; Ruus, Anders; Helberg, Morten; Bæk, Kine; Enge, Ellen Katrin; Borgå, Katrine (Peer reviewed; Journal article, 2021)Urban herring gulls (Larus argentatus) are exposed to contaminants from aquatic, terrestrial and anthropogenic sources. We aim to assess if differences in urbanisation affect ecological niche and contaminant concentrations ... -
Mercury in air and soil on an urban-rural transect in East Africa
Nipen, Maja; Jørgensen, Susanne Jøntvedt; Bohlin-Nizzetto, Pernilla; Borgå, Katrine; Breivik, Knut; Mmochi, Aviti J; Mwakalapa, Eliezer; Quant, M. Isabel; Schlabach, Martin; Vogt, Rolf David; Wania, Frank (Peer reviewed; Journal article, 2022)There are large knowledge gaps concerning concentrations, sources, emissions, and spatial trends of mercury (Hg) in the atmosphere in developing regions of the Southern Hemisphere, particularly in urban areas. Filling these ... -
Methylmercury biomagnification in an Arctic pelagic food web
Ruus, Anders; Øverjordet, Ida Beathe; Braaten, Hans Fredrik Veiteberg; Evenset, Anita; Christensen, Guttorm N.; Heimstad, Eldbjørg Sofie; Gabrielsen, Geir W.; Borgå, Katrine (Journal article; Peer reviewed, 2015)Mercury (Hg) is a toxic element that enters the biosphere from natural and anthropogenic sources, and emitted gaseous Hg enters the Arctic from lower latitudes by long-range transport. In aquatic systems, anoxic conditions ... -
The Neonicotinoid Imidacloprid Impairs Learning, Locomotor Activity Levels, and Sucrose Solution Consumption in Bumblebees (Bombus terrestris)
Paus-Knudsen, Julie Sørlie; Sveinsson, Henrik Andersen; Grung, Merete; Borgå, Katrine; Nielsen, Anders (Peer reviewed; Journal article, 2023)Bumblebees carry out the complex task of foraging to provide for their colonies. They also conduct pollination, an ecosystem service of high importance to both wild plants and entomophilous crops. Insecticides can alter ... -
New brominated flame retardants and dechlorane plus in the Arctic: Local sources and bioaccumulation potential in marine benthos
Carlsson, Pernilla; Vrana, Branislav; Sobotka, Jaromír; Borgå, Katrine; Bohlin-Nizzetto, Pernilla; Varpe, Øystein (Journal article; Peer reviewed, 2018)The aim of the present study was to investigate the presence and bioaccumulation of new flame retardants (nBFRs), polybrominated diphenyl ethers (PBDEs) and dechlorane plus (DDC-CO) in the marine environment close to an ... -
Partitioning of persistent hydrophobic contaminants to different storage lipid classes
Ruus, Anders; Allan, Ian; Bæk, Kine; Borgå, Katrine (Peer reviewed; Journal article, 2021)Lipids generally represent the major matrix contributing to the absorptive capacity for hydrophobic organic contaminants in aquatic ecosystems. The aim of the present study was to determine whether contaminants partition ... -
Preying on seals pushes killer whales from Norway above pollution effects thresholds
Andvik, Clare; Jourdain, Eve; Ruus, Anders; Lyche, Jan Ludvig; Karoliussen, Richard; Borgå, Katrine (Peer reviewed; Journal article, 2020)Killer whales (Orcinus orca) are at risk from high levels of biomagnifying pollutants, such as polychlorinated biphenyls (PCBs) and mercury (Hg). Previous toxicological risk assessments for the Norwegian killer whale ... -
Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic
Remili, Anaïs; Dietz, Rune; Sonne, Christian; Samarra, Filipa I. P.; Rikardsen, Audun H.; Kettemer, Lisa Elena; Ferguson, Steven H.; Watt, Cortney A.; Matthews, Cory J. D.; Kiszka, Jeremy J.; Jourdain, Eve Marie; Borgå, Katrine; Ruus, Anders; Granquist, Sandra M.; Rosing-Asvid, Aqqalu; McKinney, Melissa A. (Peer reviewed; Journal article, 2023)1. Quantifying the diet composition of apex marine predators such as killer whales (Orcinus orca) is critical to assessing their food web impacts. Yet, with few excep- tions, the feeding ecology of these apex predators ... -
Seasonal pollutant levels in littoral high-Arctic amphipods in relation to food sources and terrestrial run-off
Skogsberg, Stina Linnea Emelie; Mcgovern, Maeve; Poste, Amanda; Jonsson, Sofi; Arts, Michael T.; Varpe, Øystein; Borgå, Katrine (Peer reviewed; Journal article, 2022)Increasing terrestrial run-off from melting glaciers and thawing permafrost to Arctic coastal areas is expected to facilitate re-mobilization of stored legacy persistent organic pollutants (POPs) and mercury (Hg), potentially ... -
Seasonal rainfall affects occurrence of organohalogen contaminants in tropical marine fishes and prawns from Zanzibar, Tanzania
Haarr, Ane; Mwakalapa, Eliezer B; Mmochi, Aviti J; Lyche, Jan L; Ruus, Anders; Othman, Halima; Larsen, Martin M.; Borgå, Katrine (Peer reviewed; Journal article, 2021)Seasonal differences in precipitation may affect contaminant dynamics in tropical coastal regions due to terrestrial runoff of contaminants to the marine environment after the rainy seasons. To assess the effect of seasonal ... -
Small Arctic rivers transport legacy contaminants from thawing catchments to coastal areas in Kongsfjorden, Svalbard
Mcgovern, Maeve; Borgå, Katrine; Heimstad, Eldbjørg Sofie; Ruus, Anders; Christensen, Guttorm; Evenset, Anita (Peer reviewed; Journal article, 2022)Decades of atmospheric and oceanic long-range transport from lower latitudes have resulted in deposition and storage of persistent organic pollutants (POPs) in Arctic regions. With increased temperatures, melting glaciers ... -
Spatial Variation in Contaminant Occurrence in Marine Fishes and Prawns from Coastal Tanzania
Haarr, Ane; Mwakalapa, Eliezer B.; Lyche, Jan Ludvig; Mmochi, Aviti J.; Polder, Anuschka; Ruus, Anders; Borgå, Katrine (Peer reviewed; Journal article, 2021)There are limited data on organic contaminants in marine biota from coastal Tanzania, especially on the occurrence of industrial-use contaminants such as polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers ... -
Terrestrial organic matter increases zooplankton methylmercury accumulation in a brown-water boreal lake
Poste, Amanda; Hoel, Cathrine Skaar; Andersen, Tom; Arts, Michael T.; Færøvig, Per-Johan; Borgå, Katrine (Journal article; Peer reviewed, 2019)Increases in terrestrial organic matter (tOM) transport from catchments to boreal lakes can affect methylmercury (MeHg) accumulation in aquatic biota both directly by increasing concentrations of aqueous MeHg, and indirectly ... -
Within-Body Distributions and Feeding Effects of the Neonicotinoid Insecticide Clothianidin in Bumblebees (Bombus terrestris)
Aarønes, Malin Røyset; Paus-Knudsen, Julie Sørlie; Nielsen, Anders; Rundberget, Thomas; Borgå, Katrine (Peer reviewed; Journal article, 2021)Bumblebees can be exposed to neonicotinoid pesticides through nectar and pollen collected from treated crops, which can cause lethal and sublethal effects in these nontarget pollinators. However, the body distribution of ...