Katrine Borgå

• Carlsson, Pernilla; Vrana, Branislav; Sobotka, Jaromír; Borgå, Katrine; Bohlin-Nizzetto, Pernilla & Varpe, Øystein (2018). New brominated flame retardants and dechlorane plus in the Arctic: Local sources and bioaccumulation potential in marine benthos. Chemosphere.  ISSN 0045-6535.  211, s 1193- 1202 . doi: 10.1016/j.chemosphere.2018.07.158
• Grønnestad, Randi; Villanger, Gro Dehli; Polder, Anuschka; Kovacs, Kit M.; Lydersen, Christian; Jenssen, Bjørn Munro & Borgå, Katrine (2018). Effects of a complex contaminant mixture on thyroid hormones in breeding hooded seal mothers and their pups. Environmental Pollution.  ISSN 0269-7491.  240, s 10- 16 . doi: 10.1016/j.envpol.2018.04.052
• Haarr, Ane; Hylland, Ketil; Eckbo, Norith; Gabrielsen, Geir W.; Herzke, Dorte; Bustnes, Jan Ove; Blévin, Pierre; Chastel, Olivier; Moe, Børge; Hanssen, Sveinn Are; Sagerup, Kjetil & Borgå, Katrine (2018). DNA Damage in Arctic Seabirds: Baseline, Sensitivity to a Genotoxic Stressor, and Association with Organohalogen Contaminants. Environmental Toxicology and Chemistry.  ISSN 0730-7268.  37(4), s 1084- 1091 . doi: 10.1002/etc.4035 Show summary

  Environmental contaminants are found throughout Arctic marine ecosystems, and their presence in seabirds has been associated with toxicological responses. However, there are few studies of genotoxicity in Arctic avian wildlife. The purpose of the present study was to quantify deoxyribonucleic acid (DNA) damage in lymphocytes of selected seabird species and to examine whether accumulation of organohalogen contaminants (SOHCs) affects DNA damage. Blood was sampled from common eider (Somateria mollissima), black guillemot (Cepphus grylle), black-legged kittiwake (Rissa tridactyla), glaucous gull (Larus hyperboreus), arctic skua (Stercorarius parasiticus), and great skua (Stercorarius skua) in Kongsfjorden, Svalbard (Norway). Contaminant concentrations found in the 6 species differed, presumably because of foraging ecology and biomagnification. Despite large differences in contaminant concentrations, ranging from SOHCs 3.3 ng/g wet weight in the common eider to SOHCs 895 ng/g wet weight in the great skua, there was no strong difference among the species in baseline DNA damage or sensitivity to a genotoxic stressor (hydrogen peroxide). Baseline levels of DNA damage were low, with median values ranging from 1.7% in the common eider to 8.6% in the great skua. There were no associations between DNA damage and contaminants in the investigated species, suggesting that contaminant concentrations in Kongsfjorden are too low to evoke genotoxic effects, or possibly that lymphocytes are resistant to strand breakage. Clearly, genotoxicity is a topic for future studies of Arctic seabirds Arctic; Seabirds; Genotoxicity; Comet Assay; Persistent organic pollutants; Perfluoroalkyl substances

• Everaert, Gert; Ruus, Anders; Hjermann, Dag Øystein; Borgå, Katrine; Green, Norman Whitaker; Boitsov, Stepan; Jensen, Henning & Poste, Amanda (2017). Additive Models Reveal Sources of Metals and Organic Pollutants in Norwegian Marine Sediments. Environmental Science and Technology.  ISSN 0013-936X.  51(21), s 12764- 12773 . doi: 10.1021/acs.est.7b02964 Full text in Research Archive.
• Grønnestad, Randi; Villanger, Gro Dehli; Polder, Anuschka; Kovacs, Kit; Lydersen, Christian; Jenssen, Bjørn Munro & Borgå, Katrine (2017). Maternal transfer of perfluoralkyl substances in hooded seals. Environmental Toxicology and Chemistry.  ISSN 0730-7268.  36(3), s 763- 770 . doi: 10.1002/etc.3623 Full text in Research Archive.
• Hitchcock, Daniel James; Varpe, Øystein; Andersen, Tom & Borgå, Katrine (2017). Effects of reproductive strategies on pollutant concentrations in pinnipeds: a meta-analysis. Oikos.  ISSN 0030-1299.  126(6), s 772- 781 . doi: 10.1111/oik.03955
• Evenset, Anita; Hallanger, Ingeborg G.; Tessmann, Michael; Warner, Nicholas Alexander; Ruus, Anders; Borgå, Katrine; Gabrielsen, Geir W.; Christensen, Guttorm N. & Renaud, Paul (2016). Seasonal variation in accumulation of persistent organic pollutants in an Arctic marine benthic food web. Science of the Total Environment.  ISSN 0048-9697.  542, s 108- 120 . doi: 10.1016/j.scitotenv.2015.10.092
• Grung, Merete; Ruus, Anders; Schneider, Susanne Claudia; Hjermann, Dag Øystein & Borgå, Katrine (2016). Toxicokinetics of pyrene in the freshwater alga Chara rudis. Chemosphere.  ISSN 0045-6535.  157, s 49- 56 . doi: 10.1016/j.chemosphere.2016.04.128
• Bustnes, Jan Ove; Bourgeon, Sophie; Leat, Eliza H.K.; Magnusdóttir, Ellen; Strøm, Hallvard; Hanssen, Sveinn Are; Petersen, Aevar; Olafsdóttir, Kristin; Borgå, Katrine; Gabrielsen, Geir W. & Furness, Robert W. (2015). Multiple stressors in a top predator seabird: Potential ecological consequences of environmental contaminants, population health and breeding conditions. PLoS ONE.  ISSN 1932-6203.  10(7), s 1- 18 . doi: 10.1371/journal.pone.0131769 Full text in Research Archive. Show summary

  Environmental contaminants may have impacts on reproduction and survival in wildlife populations suffering from multiple stressors. This study examined whether adverse effects of persistent organic pollutants (POPs) increased with poor population health and breeding conditions in three colonies (60–74°N) of great skua (Stercorarius skua) in the north-eastern Atlantic (Shetland, Iceland and Bjørnøya [Bear Island]). POPs (organochlorines [OCs] and polybrominated diphenyl ethers [BDEs]) were measured in plasma of incubating birds (n = 222), concentrations differing nearly tenfold among colonies: Bjørnøya (2009) > Bjørnøya (2010) > Iceland (2009) > Shetland (2009). Reproductive success (hatching success and chick survival) showed that breeding conditions were favourable in Shetland and at Bjørnøya (2010), but were very poor in Iceland and at Bjørnøya (2009). Biomarkers indicated that health was poor in the Shetland population compared to the other populations. Females whose chicks hatched late had high POP concentrations in all colonies except at Bjørnøya (2010), and females losing their eggs at Bjørnøya (2009) tended to have higher concentrations than those hatching. Moreover, there was a negative relationship between female POP concentrations and chick body condition at hatching in Iceland and at Bjørnøya (2010). Supplementary feeding experiments were conducted, and in Iceland where feeding conditions were poor, significant negative relationships were found between female POP concentrations and daily growth-rate in first-hatched chicks of control nests, but not in food supplemented nests. This suggests that negative impacts of POPs were mitigated by improved feeding conditions. For second-chicks, there was a strong negative relationship between the female POP concentrations and growth-rate, but no effects of supplementary feeding. Lowered adult return-rate between breeding seasons with increasing POP loads were found both at Bjørnøya (2009) and in Shetland, especially related to BDEs. This indicates stronger fitness consequences of POPs following seasons with very poor breeding conditions and/or high reproductive effort. This study suggests that the impacts of POPs may differ depending on population health and breeding conditions, and that even low concentrations of POPs could have ecological consequences during adverse circumstances. This is important with regard to risk assessment of biomagnifying contaminants in marine ecosystems.

• McLeod, Anne M.; Arnot, Jon A.; Borgå, Katrine; Selck, Henriette; Kashian, Donna R.; Krause, Ann; Paterson, Gordon; Haffner, G. Doug & Drouillard, Ken G. (2015). Quantifying uncertainty in the trophic magnification factor related to spatial movements of organisms in a food web. Integrated Environmental Assessment and Management.  ISSN 1551-3793.  11(2), s 306- 318 . doi: 10.1002/ieam.1599
• Ruus, Anders; Øverjordet, Ida Beathe; Braaten, Hans Fredrik Veiteberg; Evenset, Anita; Christensen, Guttorm N.; Heimstad, Eldbjørg Sofie; Gabrielsen, Geir W. & Borgå, Katrine (2015). Methylmercury biomagnification in an Arctic pelagic food web. Environmental Toxicology and Chemistry.  ISSN 0730-7268.  34(11), s 2636- 2643 . doi: 10.1002/etc.3143 Full text in Research Archive. Show summary

  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 favor the bacterial transformation of inorganic Hg to methylmercury (MeHg), which has a greater potential for bioaccumulation than inorganic Hg and is the most toxic form of Hg. The main objective of the present study was to quantify the biomagnification of MeHg in a marine pelagic food web, comprising species of zooplankton, fish, and seabirds, from the Kongsfjorden system (Svalbard, Norway), by use of trophic magnification factors. As expected, tissue concentrations of MeHg increased with increasing trophic level in the food web, though at greater rates than observed in several earlier studies, especially at lower latitudes. There was strong correlation between MeHg and total Hg concentrations through the food web as a whole. The concentration of MeHg in kittiwake decreased from May to October, contributing to seasonal differences in trophic magnification factors. The ecology and physiology of the species comprising the food web in question may have a large influence on the magnitude of the biomagnification. A significant linear relationship was also observed between concentrations of selenium and total Hg in birds but not in zooplankton, suggesting the importance of selenium in Hg detoxification for individuals with high Hg concentrations. Environ Toxicol Chem 2015;34:2636–2643. © 2015 SETAC

• Zheng, Qian; Nizzetto, Luca; Liu, Xiang; Borgå, Katrine; Starrfelt, Jostein; Li, Jun; Jiang, Yishan; Liu, Xin; Jones, Kevin C. & Zhang, Gan (2015). Elevated mobility of persistent organic pollutants in the soil of a tropical rainforest. Environmental Science and Technology.  ISSN 0013-936X.  49(7), s 4302- 4309 . doi: 10.1021/es5058677
• Øverjordet, Ida Beathe; Gabrielsen, Geir Wing; Berg, Torunn; Ruus, Anders; Evenset, Anita; Borgå, Katrine; Christensen, Guttorm; Lierhagen, Syverin & Jenssen, Bjørn Munro (2015). Effect of diet, location and sampling year on bioaccumulation of mercury, selenium and cadmium in pelagic feeding seabirds in Svalbard. Chemosphere.  ISSN 0045-6535.  122, s 14- 22 . doi: 10.1016/j.chemosphere.2014.10.060
• Øverjordet, Ida Beathe; Kongsrud, Magnus Brunvoll; Gabrielsen, Geir Wing; Berg, Torunn; Ruus, Anders; Evenset, Anita; Borgå, Katrine; Christensen, Guttorm & Jenssen, Bjørn Munro (2015). Toxic and essential elements changed in black-legged kittiwakes (Rissa tridactyla) during their stay in an Arctic breeding area. Science of the Total Environment.  ISSN 0048-9697.  502, s 548- 556 . doi: 10.1016/j.scitotenv.2014.09.058
• Guzzo, Matthew M.; Eckbo, Norith; Gabrielsen, Geir W.; Fisk, Aaron T.; Hylland, Ketil & Borgå, Katrine (2014). Persistent organic pollutant concentrations in fledglings of two arctic seabird species. Environmental Pollution.  ISSN 0269-7491.  184, s 414- 418 . doi: 10.1016/j.envpol.2013.09.007
• Baert, Jan M.; Janssen, Colin Roger; Borgå, Katrine & De Laender, Frederik (2013). Migration and opportunistic feeding increase PCB accumulation in Arctic seabirds. Environmental Science and Technology.  ISSN 0013-936X.  47(20), s 11793- 11801 . doi: 10.1021/es402898t
• Borgå, Katrine; Fjeld, Eirik; Kierkegaard, Amelie & McLachlan, Michael S. (2013). Consistency in trophic magnification factors of Cyclic Methyl Siloxanes in Pelagic freshwater Food Webs leading to Brown Trout. Environmental Science and Technology.  ISSN 0013-936X.  47(24), s 14394- 14402 . doi: 10.1021/es404374j
• Bourgeon, Sophie; Leat, Eliza H. K.; Furness, Robert W.; Borgå, Katrine; Hanssen, Sveinn Are & Bustnes, Jan Ove (2013). Dietary versus maternal sources of organochlorines in top predator seabird chicks: an experimental approach. Environmental Science and Technology.  ISSN 0013-936X.  47(11), s 5963- 5970 . doi: 10.1021/es400442q
• Leat, Eliza H. K.; Bourgeon, Sophie; Eze, Jude I.; Muir, Derek C.G.; Williamson, Mary; Bustnes, Jan Ove; Furness, Robert W. & Borgå, Katrine (2013). Perfluoroalkyl substances in eggs and plasma of an avian top predator, great skua (Stercorarius skua), in the north atlantic. Environmental Toxicology and Chemistry.  ISSN 0730-7268.  32(3), s 569- 576 . doi: 10.1002/etc.2101 Show summary

  Temporal, biological, and environmental factors affecting accumulation of perfluoroalkyl substances (PFASs) are poorly understood in comparison with legacy lipid-soluble persistent organic pollutants. Temporal and biological comparisons of PFAS concentrations were made in great skuas (Stercorarius skua), a marine apex predator. Concentrations of 16 PFASs were quantified, including C4–C10 perfluorosulfonates (PFSAs), perfluorooctanesulfonamide (PFOSA), and C5–C14 perfluorocarboxylates (PFCAs). Concentrations of PFASs (ng/g wet wt) were significantly higher in eggs collected in Shetland in 2008 compared with 1980 for most compounds. However, the magnitude of the differences was small, with a mean increase of 3 ng/g. Levels of PFASs in great skuas were low compared with those of other seabirds in similar ecological niches; and in contrast to other contaminants measured in the same eggs, concentrations of PFASs did not correlate with trophic level. Concentrations of PFASs in adult plasma were significantly higher in males than in females for most PFASs. This suggests that maternal transfer through egg laying may be a significant mode of elimination of PFASs in female great skuas. The low concentrations of PFASs in eggs and plasma compared with other halogenated organiccontaminants and other species suggest that great skuas do not bioaccumulate PFASs to the same extent as some other seabirds. Temporal change,Maternal transfer, Trophic level, Wildlife, marine

• Leat, Eliza H. K.; Bourgeon, Sophie; Magnusdottir, Ellen; Gabrielsen, Geir W.; Grecian, W James; Hanssen, Sveinn Are; Olafsdottir, Kristin; Petersen, Aevar; Phillips, Richard A.; Strøm, Hallvard; Ellis, Sandra; Fisk, Aaron T.; Bustnes, Jan Ove; Furness, Robert W. & Borgå, Katrine (2013). Influence of wintering area on persistent organic pollutants in a breeding migratory seabird. Marine Ecology Progress Series.  ISSN 0171-8630.  491, s 277- 293 . doi: 10.3354/meps10455 Show summary

  As apex marine predators, seabirds are often sampled to monitor bioaccumulative persistent organic pollutants (POPs) in the marine environment. Despite the restrictions on use and production of many POPs, concern remains about levels of these chemicals present in marine biota due to their potential toxicity. Many seabird species are migratory, and although overwintering area has been hypothesized to affect the accumulation of POPs, few have studied the contribution of exposure in the wintering area on the POP burdens of seabirds. This study investigated the impact of wintering area on concentrations and patterns of organochlorines (OCs) and polybrominated diphenyl ethers (PBDEs) in plasma of breeding great skuas Stercorarius skua from 3 colonies; Bjørnøya (Svalbard), southeast Iceland and Shetland (Scotland). To do so, stable isotope values of primary feathers grown during the winter were used in conjunction with geolocator data (n = 16) to assign untracked individuals (n = 122), to 3 wintering areas (America, Europe and Africa). Birds wintering in Africa had lower plasma concentrations of many OCs and PBDE 47 compared to the other areas. Nevertheless, the influence of wintering area differed between contaminants and between breeding colonies. We conclude that although wintering area had a significant effect on both concentrations and patterns of POPs, its influence was small in comparison to differences in exposure to these pollutants at breeding colonies, but that accumulation of POPs during the winter may be important for specific populations of seabirds Stercorarius skua, Pesticides, PCBs, PBDEs, Feather stable isotopes,Geolocation

• Liu, Xiang; Ming, Li-Li; Nizzetto, Luca; Borgå, Katrine; Larssen, Thorjørn; Zheng, Qian; Li, Jun & Zhang, Gan (2013). Critical evaluation of a new passive exchange-meter for assessing multimedia fate of persistent organic pollutants at the air-soil interface. Environmental Pollution.  ISSN 0269-7491.  181, s 144- 150 . doi: 10.1016/j.envpol.2013.06.020
• Ruus, Anders; Allan, Ian; Øxnevad, Sigurd; Schaanning, Morten; Borgå, Katrine; Bakke, Torgeir Heggelund & Næs, Kristoffer (2013). In vivo bioaccumulation of contaminants from historically polluted sediments - Relation to bioavailability estimates. Science of the Total Environment.  ISSN 0048-9697.  442, s 336- 343 . doi: 10.1016/j.scitotenv.2012.10.060 Full text in Research Archive.
• Sonne, Christian; Rigét, Frank F.; Leat, Eliza H. K.; Bourgeon, Sophie; Borgå, Katrine; Strøm, Hallvard; Hanssen, Sveinn Are; Gabrielsen, Geir W.; Petersen, Aevar; Olafsdottir, Kristin; Magnusdottir, Ellen; Bustnes, Jan Ove; Furness, Robert W. & Kjelgaard-Hansen, Mads (2013). Organohalogen contaminants and Blood plasma clinical–chemical parameters in three colonies of North Atlantic Great skua (Stercorarius skua). Ecotoxicology and Environmental Safety.  ISSN 0147-6513.  92, s 245- 251 . doi: 10.1016/j.ecoenv.2013.02.012 Show summary

  The present study compares blood plasma clinical–chemical parameters (BCCPs) in birds from three geographically distinct North Atlantic Great skua (Stercorarius skua) colonies. Birds from these sites bioaccumulate different POP (persistent organic pollutant) concentrations and that enabled us to compare Great skua BCCPs in different exposure scenarios. Persistent organic pollutants (organochlorines: PCB, DDT, chlordanes, HCB, HCH, mirex and brominated flame retardants: PBDEs) and nineteen BCCPs were analysed in 114 adult Great skuas sampled during summer 2009 in North Atlantic colonies at Bjørnøya (n¼42), Iceland (n¼57) and Shetland (n¼15). Specimens from Bjørnøya had the highest blood plasma concentrations of all contaminant groups followed by Iceland and Shetland birds, respectively (ANOVA: po0.05). Most of the 19 BCCP parameters followed the pattern of colony differences found for contaminants, with Bjørnøya having the highest concentrations. However seven BCCPs, the three liver enzymes ALKP, ALAT and GGT as well as bile acids, cholesterol, sodium and potassium, did not differ between colonies (ANOVA: p40.05). Therefore correlation analyses of these seven BCCPs vs. POPs were done on the combined colony data while the analyses of the remaining 12 BCCPs were carried out for each colony separately. The analyses of combined colony data showed that the blood plasma concentration of liver enzymes ALAT and GGT increased with increasing concentrations of SPBDE and SHCH, HCB and SCHL, respectively (all Pearson’s po0.05). In Great skuas from Shetland, the important osmotic transport protein albumin increased with increasing concentrations of SPCB and SDDT, while total blood plasma protein increased with SPCB, SDDT, SHCH and HCB concentrations (all Pearson’s po0.05). In both Bjørnøya and Iceland skuas, blood plasma pancreatic enzyme amylase decreased with increasing SHCH concentrations while the erythrocyte waste product total bilirubin in blood plasma increased with increasing SHCH and SPBDE concentrations in Iceland Great skuas (all Pearson’s po0.05). In Bjørnøya birds, blood plasma urea from protein metabolism (reflects kidney function) increased with increasing SPBDE concentrations (Pearson’s po0.05). Furthermore, a redundancy analysis showed that 10.6% of the variations in BCCPs could be explained by the variations in POP concentrations. Based on these results we suggest that liver and renal functions could be negatively affected by different POP compounds. It is, however, uncertain if the colony BCCP differences and their relationship to POP concentrations reflect health effects that could have an overall impact on the populations via reduced survival and reproduction parameters ALAT, albumin, amylase, blood plasma biochemistry, GGT, persistent organic pollutants, total bilirubin, total protein, urea

• Starrfelt, Jostein; Borgå, Katrine; Ruus, Anders & Fjeld, Eirik (2013). Estimating trophic levels and trophic magnification factors using Bayesian inference. Environmental Science and Technology.  ISSN 0013-936X.  47(20), s 11599- 11606 . doi: 10.1021/es401231e Full text in Research Archive.
• Borgå, Katrine; Fjeld, Eirik; Kierkegaard, Amelie & McLachlan, Michael S. (2012). Food web accumulation of cyclic siloxanes in Lake Mjøsa, Norway. Environmental Science and Technology.  ISSN 0013-936X.  46(11), s 6347- 6354 . doi: 10.1021/es300875d
• Borgå, Katrine; Kidd, Karen A.; Muir, Derek C.G.; Berglund, Olof; Conder, Jason M.; Gobas, Frank A.P.C.; Kucklick, John; Malm, Olaf & Powell, David E. (2012). Trophic Magnification Factors: Considerations of Ecology, Ecosystems, and Study Design. Integrated Environmental Assessment and Management.  ISSN 1551-3793.  8(1), s 64- 84 . doi: 10.1002/ieam.244
• Bourgeon, Sophie; Leat, Eliza H. K.; Magnusdottir, Ellen; Fisk, Aaron T.; Furness, Robert W.; Strøm, Hallvard; Hanssen, Sveinn Are; Petersen, Ævar; Olafsdottir, Kristin; Borgå, Katrine; Gabrielsen, Geir W. & Bustnes, Jan Ove (2012). Individual variation in biomarkers of health: Influence of persistent organic pollutants in Great skuas (Stercorarius skua) breeding at different geographical locations. Environmental Research.  ISSN 0013-9351.  118, s 31- 39 . doi: 10.1016/j.envres.2012.08.004
• Bustnes, Jan Ove; Borgå, Katrine; Dempster, Timothy David; Lie, Elisabeth; Nygård, Torgeir & Uglem, Ingebrigt (2012). Latitudinal Distribution of Persistent Organic Pollutants in Pelagic and Demersal Marine Fish on the Norwegian Coast. Environmental Science and Technology.  ISSN 0013-936X.  46(14), s 7836- 7843 . doi: 10.1021/es301191t
• Bustnes, Jan Ove; Moe, Børge; Hanssen, Sveinn Are; Herzke, Dorte; Fenstad, Anette; Nordstad, Tore; Borgå, Katrine & Gabrielsen, Geir W. (2012). Temporal Dynamics of Circulating Persistent Organic Pollutants in a Fasting Seabird under Different Environmental Conditions. Environmental Science and Technology.  ISSN 0013-936X.  46(18), s 10287- 10294 . doi: 10.1021/es301746j
• Conder, Jason M.; Gobas, Frank A.P.C.; Borgå, Katrine; Muir, Derek C.G. & Powell, David E. (2012). Use of Trophic Magnification Factors and Related Measures to Characterize Bioaccumulation Potential of Chemicals. Integrated Environmental Assessment and Management.  ISSN 1551-3793.  8(1), s 85- 97 . doi: 10.1002/ieam.216
• Nizzetto, Luca; Gioia, Rosalinda; Li, Jun; Borgå, Katrine; Pomati, Francesco; Bettinetti, Roberta; Dachs, Jordi & Jones, Kevin C. (2012). Biological Pump Control of the Fate and Distribution of Hydrophobic Organic Pollutants in Water and Plankton. Environmental Science and Technology.  ISSN 0013-936X.  46(6), s 3204- 3211 . doi: 10.1021/es204176q
• Hallanger, Ingeborg Gammelsæter; Ruus, Anders; Herzke, Dorte; Warner, Nicholas Alexander; Evenset, Anita; Heimstad, Eldbjørg Sofie; Gabrielsen, Geir W. & Borgå, Katrine (2011). Influence of season, location, and feeding strategy on bioaccumulation of halogenated organic contaminants in Arctic marine zooplankton. Environmental Toxicology and Chemistry.  ISSN 0730-7268.  30(1), s 77- 87 . doi: 10.1002/etc.362
• Hallanger, Ingeborg Gammelsæter; Ruus, Anders; Warner, Nicholas Alexander; Herzke, Dorte; Evenset, Anita; Schøyen, Merete; Gabrielsen, Geir W. & Borgå, Katrine (2011). Differences between Arctic and Atlantic fjord systems on bioaccumulation of persistent organic pollutants in zooplankton from Svalbard. Science of the Total Environment.  ISSN 0048-9697.  409(14), s 2783- 2795 . doi: 10.1016/j.scitotenv.2011.03.015
• Hallanger, Ingeborg Gammelsæter; Warner, Nicholas Alexander; Ruus, Anders; Evenset, Anita; Christensen, Guttorm; Herzke, Dorte; Gabrielsen, Geir W. & Borgå, Katrine (2011). Seasonality in contaminant accumulation in Arctic marine pelagic food webs using trophic magnification factor as a measure of bioaccumulation. Environmental Toxicology and Chemistry.  ISSN 0730-7268.  30(5), s 1026- 1035 . doi: 10.1002/etc.488
• Leat, Eliza H. K.; Bourgeon, Sophie; Borgå, Katrine; Strøm, Hallvard; Hanssen, Sveinn Are; Gabrielsen, Geir W.; Petersen, Ævar; Olafsdottir, Kristin; Magnusdottir, Ellen; Fisk, Aaron T.; Ellis, Sandra; Bustnes, Jan Ove & Furness, Robert W (2011). Effects of environmental exposure and diet on levels of persistent organic pollutants (POPs) in eggs of a top predator in the North Atlantic in 1980 and 2008. Environmental Pollution.  ISSN 0269-7491.  159(5), s 1222- 1228 . doi: 10.1016/j.envpol.2011.01.036
• Saloranta, Tuomo Mikael; Ruus, Anders & Borgå, Katrine (2011). Identification of the most influential factors in the Norwegian guidelines for risk assessment of dispersion of contaminants from sediments. Integrated Environmental Assessment and Management.  ISSN 1551-3793.  7(4), s 657- 667 . doi: 10.1002/ieam.188
• Bustnes, Jan Ove; Moe, Børge; Herzke, Dorte; Hanssen, Sveinn Are; Nordstad, Tore; Sagerup, Kjetil; Gabrielsen, Geir W. & Borgå, Katrine (2010). Strongly increasing blood concentrations of lipid-soluble organochlorines in high arctic common eiders during incubation fast. Chemosphere.  ISSN 0045-6535.  79(3), s 320- 325 . doi: 10.1016/j.chemosphere.2010.01.026
• Sobek, Anna; McLachlan, Michael S.; Borgå, Katrine; Asplund, Lillemor; Lundstedt-Enkel, Katrin; Polder, Anuschka & Gustafsson, Örjan (2010). A comparison of PCB bioaccumulation factors between an arctic and a temperate marine food web. Science of the Total Environment.  ISSN 0048-9697.  408(13), s 2753- 2760 . doi: 10.1016/j.scitotenv.2010.03.013
• Borgå, Katrine; Saloranta, Tuomo Mikael & Ruus, Anders (2010). Simulating climate change-induced alterations in bioaccumulation of organic contaminants in an Arctic marine food web. Environmental Toxicology and Chemistry.  ISSN 0730-7268.  29(6), s 1349- 1357 . doi: 10.1002/etc.159
• Helgason, Lisa Bjørnsdatter; Verreault, J; Braune, BM; Borgå, Katrine; Primicerio, Raul; Jenssen, Bjørn Munro & Gabrielsen, Geir W. (2010). Relationship between persistent halogenated organic contaminants and TCDD-toxic equivalents on EROD activity and retinoid and thyroid hormone status in northern fulmars. Science of the Total Environment.  ISSN 0048-9697.  408(24), s 6117- 6123 . doi: 10.1016/j.scitotenv.2010.08.037
• Nizzetto, Luca; MacLeod, Matthew; Borgå, Katrine; Cabrerizo, Ana; Dachs, Jordi; Di Guardo, Antonio; Ghirardello, Davide; Hansen, Kaj M.; Jarvis, Andrew; Lindroth, Anders; Ludwig, Bernard; Monteith, Donald; Perlinger, Judith A.; Scheringer, Martin; Schwendenmann, Luitgard; Semple, Kirk T.; Wick, Lukas Y.; Zhang, Gan & Jones, Kevin C. (2010). Past, Present, and Future Controls on Levels of Persistent Organic Pollutants in the Global Environment. Environmental Science and Technology.  ISSN 0013-936X.  44(17), s 6526- 6531
• Warner, Nicholas Alexander; Evenset, Anita; Christensen, Guttorm; Gabrielsen, Geir W.; Borgå, Katrine & Leknes, Henriette (2010). Volatile siloxanes in the European arctic: assessment of sources and spatial distribution. Environmental Science and Technology.  ISSN 0013-936X.  44(19), s 7705- 7710 . doi: 10.1021/es101617k
• Borgå, Katrine; Hop, H; Skåre, Janneche Utne; Wolkers, Hans & Gabrielsen, Geir Wing (2007). Selective bioaccumulation of chlorinated pesticides and metabolites in Arctic seabirds. Environmental Pollution.  ISSN 0269-7491.  145(2), s 545- 553 Show summary

  Chlorinated pesticides and metabolites (CPs) were quantified in the seabird species: little auk (Alle alle), Brünnich's guillemot (Uria lomvia), black guillemot (Cepphus grylle) and black-legged kittiwake (Rissa tridactyla). The purpose was to evaluate avian accumulation of selected CPs based on their concentrations and relative patterns, their relation to dietary descriptors (stable isotopes of carbon and nitrogen), to enzymes involved in biotransformation, as well as CPs' accumulation potential relative to the recalcitrant polychlorinated biphenyl PCB-153. In all species, the CP pattern was dominated by p,p?-dichlorodiphenyltrichloroethane (DDE) and hexachlorbenzene (HCB). Except for HCB, concentrations were not related to trophic position. Most CPs were quantified in black guillemot, indicating a slower elimination compared to other seabird species. Brünnich's guillemot showed efficient elimination of chlordanes, whereas the opposite was found for little auk. Kittiwake showed higher accumulation of persistent CP and metabolites than auks, whereas accumulation of less recalcitrant CPs was low.

• Knudsen, Lisa Bjørnsdatter; Borgå, Katrine; Jørgensen, Even Hjalmar; van Bavel, Bert; Schlaback, Martin; Verreault, Jonathan & Gabrielsen, Geir Wing (2007). Halogenated organic contaminants and mercury in northern fulmars (Fulmarus glacialis): levels, relationships to dietary descriptors and blood to liver comparison. Environmental Pollution.  ISSN 0269-7491.  146, s 25- 33 . doi: 10.1016/j.envpol.2006.06.017
• Steffen, Linn Cecilie; Borgå, Katrine; Skåre, Janneche Utne & Bustnes, Jan Ove (2006). Occurrence of organochlorines in avian top predators along a latitudinal gradient. Environmental Science and Technology.  ISSN 0013-936X.  15;40(16), s 5139- 5146
• Borgå, Katrine; Gabrielsen, Geir Wing; Skåre, Janneche Utne; Kleivane, Lars; Norstrom, Ross J. & Fisk, Aaron T. (2005). Why do organochlorine differences between arctic regions vary among trophic levels?. Environmental Science and Technology.  ISSN 0013-936X.  39(12), s 4343- 4352 Show summary

  Statistical analysis of organochlorine contaminants (OCs) in marine mammals has shown that, for most OCs, the European Arctic is more contaminated than the Canadian and U.S. Arctic. Recently, comparison of OC concentration ranges in seabirds, arctic cod (Boregadus saida), and zooplankton, found no difference between these regions. To address these inconsistencies, marine food web OC data from the European (central Barents Sea (CBS)) and Canadian Arctic (Northwater Polynya (NOW)) were simultaneously statistically analyzed. In general, concentrations of OCs were greater in seabirds and ringed seals (Phoca hispida) from the CBS as compared to the NOW; consistent with circumpolar trends observed in marine mammals. In contrast, levels of OCs were generally similar in zooplankton and arctic cod between the CBS and NOW. The main exception is HCH which had greater levels in the NOW across all trophic levels because of the greater proximity to sources in eastern Asia. The lack of differences in OC concentrations in zooplankton and Arctic cod from the European and Canadian Arctic suggest that regional differences in OC contamination in the Arctic have evened out. Reduced regional differences were not observed in marine mammals or seabirds because they are long-lived and also acquire contaminants from maternal transfer and hence reflect levels from the past when the European Arctic was more contaminated than the Canadian Arctic. In addition, seabirds may reflect exposure from other areas. This study highlights the potential problem of comparing spatial trends by using means and confidence intervals as compared to simultaneous statistical analysis of raw data. Differences in the spatial trends of OCs between trophic levels in the Arctic are important for consideration when assessing regional differences in spatial and temporal trends of discontinued and current-use contaminants.

• Borgå, Katrine; Wolkers, Hans; Skåre, Janneche Utne; Hop, H; Muir, Derek C. G. & Gabrielsen, Geir Wing (2005). Bioaccumulation of PCBs in Arctic seabirds: influence of dietary exposure and congener biotransformation. Environmental Pollution.  ISSN 0269-7491.  134, s 397- 409 Show summary

  Four seabird species and their prey (zooplankton or fish) were collected in the Barents Sea to determine how dietary exposure, cytochrome P450 (CYP) enzyme activities and sex influenced their hepatic PCB concentrations and accumulation patterns. Five mates and five females from each seabird species (little auk (Alle alle), Brunnich's guillemot (Uria lomvia), black guillemot (Cepphus grylle) and black-legged kittiwake (Rissa tridactyla)) were analysed. PCB concentrations could not be explained directly by carbon source (delta(13)C) or trophic position (delta(15)N), but by a combination of dietary parameters (delta(13)C, delta(15)N, migratory pattern, age) and contaminant metabolism. Contrary to previous studies, the PCB pattern differed among seabirds, with a higher proportion of persistent congeners (% of PCB-153, RPCB-153) in black-legged kittiwake than in auks. The PCB pattern also differed among auks, with little auk as the most efficient biotransformer (highest RPCB-153 values of persistent congeners). Based on high RPCB-153 values, Munich's guillemot poorly metabolised ortho-meta-unsubstituted congeners, whereas black guillemot poorly metabolised meta Para unsubstituted congeners. Species-specific differences in PCB biotransformation were confirmed by metabolic indices, where PCB patterns in seabirds were adjusted for PCB pattern in prey. The relative contribution of ortho-meta-unsubstituted congeners to SigmaPCBs decreased with increasing EROD activity. There were no differences in PCB concentrations, PCB patterns or cytochrome P450 enzyme activities between males and females. CYP P450 activities (CYP1A- and CYP2B/3A-like: EROD and testosterone 6beta-hydroxylation, respectively) were low and did not correlate with concentrations of non- or mono-ortho Cl-substituted PCBs (NO- and MO-PCBs), or with total toxic equivalent concentrations (TEQs) for dioxin-like effects of NO- and MO-PCBs. (C) 2004 Elsevier Ltd. All rights reserved.

• Borgå, Katrine; Gabrielsen, Geir Wing & Skåre, Janneche Utne (2003). Comparison of organochlorine concentrations and patterns between free-ranging zooplankton and zooplankton sampled from seabirds' stomachs. Chemosphere.  ISSN 0045-6535.  53, s 685- 689
• Borgå, Katrine; Gabrielsen, Geir Wing & Skåre, Janneche Utne (2002). Difference in contamination load between planktonic and ice-associated fauna in the Artic marginal ice zone: influence of habitat, diet and geography. ?.  235, s 157- 169
• Borgå, Katrine; Gulliksen, B; Gabrielsen, Geir Wing & Skåre, Janneche Utne (2002). Size-related bio-accumulation and between – year variation of organochlorines in ice-associated amphipods from the Artic Ocean. Chemosphere.  ISSN 0045-6535.  46, s 9- 10
• Borgå, Katrine; Poltermann, Michael; Polder, Anuschka; Pavlova, O; Gulliksen, B; Gabrielsen, Geir Wing & Skåre, Janneche Utne (2002). Influence of diet and sea ice drift on organochlorine bioaccumulation in arctic ice-associated amphipods. Environmental Pollution.  ISSN 0269-7491.  117(1), s 47- 60
• Hop, H; Borgå, Katrine; Gabrielsen, Geir Wing; Kleivane, Lars & Skåre, Janneche Utne (2002). Food web magnification of persistent organic pollutants in poikilotherms and homeotherms from the Barents Sea. Environmental Science and Technology.  ISSN 0013-936X.  36, s 2589- 2597

View all works in Cristin

• Carlsson, Pernilla Marianne; Bohlin-Nizzetto, Pernilla; Vrana, Branislav; Varpe, Øystein; Sobotka, Jaromír & Borgå, Katrine (2018). Investigation of new brominated and organophosphorous flame retardants in Svalbard benthic marine food web; FlammePlank. NIVA-rapport. 7261. Full text in Research Archive. Show summary

  The aim of this pilot-study was to use silicone rubber-based passive samplers to measure novel brominated flame retardants (nBFRs), polybrominated diphenyl ethers (PBDEs) and dechlorane plus (DP) in seawater and air around Longyearbyen as well as investigate the presence of those compounds in sediment and biota (amphipods, Gammarus spp.) nearby Longyearbyen. Passive samplers require no electricity and provide an integrated picture of the levels of the targeted compounds over time. The results were combined with the sampled sediment and Gammarus spp. to assess concentrations in the environment. Out of all substances under study, PBDE-47 and -99, α- and β- tetrabromoethylcyclohexane (TBECH), syn- and anti-DP were detected in all investigated matrices. Freely dissolved water concentrations of ΣDPs (3 pg/L) were in line with recent Arctic studies, while ΣPBDEs (3 pg/L) were comparable to urban rivers in southern Norway. Nevertheless, for some compounds, especially the lighter and most volatile ones, long-range transport is most likely a more important contribution to observed levels than local sources. For other compounds, e.g. PBDEs, local sources might still play a role for the load of contaminants into the surrounding environment. The present study is the first to report a suit of nBFRs and DPs in Arctic benthic fauna. Many of the nBFRs and DPs were detected in sediment and in the amphipods. We recommend further studies with respect to measurements of concentrations over time, and in other species as well, to better understand whether the nBFRs and DPs are common in the marine environment on Svalbard. We recommend that local sources of flame retardants in remote areas receive more attention in the future.

• Hitchcock, Daniel James; Loonen, M. J.; Warner, Nicholas Alexander; Herzke, Dorte; Tombre, Ingunn; Shimmings, Paul; Griffin, L. R.; Varpe, Øystein; Andersen, Tom & Borgå, Katrine (2018). Migration effects on pollutants in eggs of Arctic - breeding geese.
• Paus-Knudsen, Julie Sørlie; Nielsen, Anders; Grung, Merete & Borgå, Katrine (2018). Sub-lethal effects of imidacloprid, a neonicotinoid pesticide, on bumblebees.
• Borgå, Katrine; Øystein, Varpe; Vrana, Branislav & Carlsson, Pernilla Marianne (2017). New brominated and organophosphorous flame retardants in Svalbard; local or long range origin?.
• Kallenborn, Roland; Sydnes, Leiv K.; Vogt, Rolf David & Borgå, Katrine (2017). Kan vi få en fremtid uten forurensning fra kjemikalier?. Forskning.no : nettavis med nyheter fra norsk og internasjonal forskning.
• Källqvist, Torsten; Dirven, Hubert; Rivedal, Edgar; Sæthre, May; Wendell, Micael; Borgå, Katrine; Eklo, Ole Martin; Grung, Merete; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne & Sverdrup, Line Emilie (2017). Risk assessment of the biological plant protection product Montyline with the active organism Amblyseius montdorensis. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2017:02.
• Källqvist, Torsten; Dirven, Hubert; Rivedal, Edgar; Sæthre, May; Wendell, Micael; Borgå, Katrine; Eklo, Ole Martin; Grung, Merete; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne & Sverdrup, Line Emilie (2017). Risk assessment of the biological plant protection product Nemasys C with the active organism Steinernema carpocapsae. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2017:1.
• Keilen, Ellen Kristine; Borgå, Katrine; Ruus, Anders; Helberg, Morten; Reiertsen, Tone; Warner, Nicholas Alexander & Hylland, Ketil (2017). Levels and effects of environmental contaminants in herring gull (Larus argentatus) from an urban and a rural colony in Norway.
• Poste, Amanda; Allan, Ian; Arts, Michael T.; Borgå, Katrine; Carlsson, Pernilla Marianne; Christensen, Guttorm; Dunton, Ken; Evenset, Anita; Leu, Eva; Renaud, Paul E.; Ruus, Anders; Søreide, Janne; Varpe, Øystein & Braaten, Hans Fredrik Veiteberg (2017). The TerrACE project: Effects of terrestrial inputs on contaminant dynamics in Arctic coastal ecosystems.
• Poste, Amanda; Koppelle, Sebastiaan; Seuthe, Lena; Christensen, Guttorm; Braaten, Hans Fredrik Veiteberg; Borgå, Katrine; Ruus, Anders & Kaste, Øyvind (2017). Riverine inputs to Norwegian fjords: Effects on lower food web structure and mercury bioaccumulation.
• Ruus, Anders; Øverjordet, Ida Beathe; Braaten, Hans Fredrik Veiteberg; Evenset, Anita; Christensen, Guttorm; Gabrielsen, Geir W. & Borgå, Katrine (2017). Methylmercury in Arctic Seabirds - Seasonal inter-tissue differences.
• Ruus, Anders; Øverjordet, Ida Beathe; Braaten, Hans Fredrik Veiteberg; Evenset, Anita; Christensen, Guttorm; Heimstad, Eldbjørg Sofie; Gabrielsen, Geir W. & Borgå, Katrine (2017). Methylmercury in an Arctic food web - With focus on seabirds.
• Schultze, Sabrina; Poste, Amanda; Ruus, Anders; Hessen, Dag Olav; Andersen, Tom & Borgå, Katrine (2017). Do high levels of terrestrial DOM uptake lead to higher contaminant concentration and changes in energy allocation and growth? A study on three marine lower food web taxa.
• Treimo, Alexandra Isabel Sveinsen; Borgå, Katrine; Samuelsen, Jan Tore; Paulsen, Ragnhild Elisabeth & Rakkestad, Kirsten Eline (2017). Are nanoparticles used in dental materials neurotoxic?.
• Carlsson, Pernilla Marianne; Pawlak, Janet; Wilson, Simon; Christensen, Jesper Heile; Borgå, Katrine; Pfaffhuber, Katrine Aspmo; Odland, Jon Øyvind; Kallenborn, Roland & Reiersen, Lars Otto (2016). Influence of climate change on transport, levels and effects of contaminants in Northern areas.
• Källqvist, Torsten; Dirven, Hubert; Gjøen, Tor; Tronsmo, Arne; Yazdankhah, Siamak Pour; Rivedal, Edgar; Borgå, Katrine; Eklo, Ole Martin; Grung, Merete; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne & Sverdrup, Line Emilie (2016). Risk assessment of the biological plant protection product Serenade ASO, with the organism Bacillus subtilis QST 713. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2016:21. Full text in Research Archive.
• Källqvist, Torsten; Dirven, Hubert; Gjøen, Tor; Tronsmo, Arne; Yazdankhah, Siamak Pour; Rivedal, Edgar; Borgå, Katrine; Eklo, Ole Martin; Grung, Merete; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne & Sverdrup, Line Emilie (2016). Risk assessment of the biological plant protection product Turex 50 WG, with the organism Bacillus thuringiensis ssp. aizawai CG-91. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2016:20. Full text in Research Archive.
• Paus Knudsen, Julie; Borgå, Katrine & Nielsen, Anders (2016). Sublethal effects if imidacloprid, a neonicotinoid pesticide, on bumblebees.
• Dirven, Hubert; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne; Borgå, Katrine; Eklo, Ole Martin; Grung, Merete; Sverdrup, Line Emilie & Källqvist, Torsten (2015). Genotoxic assessment of the metabolite M-11 of mepanipyrim, the active ingredient in the plant protection product FRUPICA SC. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2015:02. Full text in Research Archive.
• Eklo, Ole Martin; Almvik, Marit; Hole, Halvard; Nyborg, Åge Arild; Stenrød, Marianne; Borgå, Katrine; Dirven, Hubert; Grung, Merete; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne; Sverdrup, Line Emilie & Källqvist, Torsten (2015). Degradation and mobility of pesticides in Norwegian soils. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2015:34. Full text in Research Archive.
• Grønnestad, Randi; Borgå, Katrine; Villanger, Gro Dehli; Polder, Anuschka & Hylland, Ketil (2015). Occurrence and maternal transfer of perfluoroalkyl substances (PFASs), and their associations with thyroid hormones in hooded seal (Cystophora cristata) mother-pup pairs.
• Haarr, Ane; Hylland, Ketil; Hertzke, Dorte; Gabrielsen, Geir Wing; Bustnes, Jan Ove & Borgå, Katrine (2015). DNA damage in Arctic avian predators: baseline, sensitivity to damage and association to contaminant exposure.
• Källqvist, Torsten; Grung, Merete; Borgå, Katrine; Dirven, Hubert; Eklo, Ole Martin; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne & Sverdrup, Line Emilie (2015). Risk assessment of Malakite with the active substances dithianon and pyrimethanil. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2015:11. Full text in Research Archive.
• Källqvist, Torsten; Sæthre, May; Borgå, Katrine; Dirven, Hubert; Eklo, Ole Martin; Grung, Merete; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne & Sverdrup, Line Emilie (2015). Risk assessment of Macrolophus pygmaeus as biological control product. Opinion of the Panel on Plant Production Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2015:06. Full text in Research Archive.
• Lyche, Jan Ludvig; Dirven, Hubert; Låg, Marit; Nilsen, Asbjørn Magne; Borgå, Katrine; Eklo, Ole Martin; Grung, Merete; Sverdrup, Line Emilie & Källqvist, Torsten (2015). Risk assessment of the metabolite M44 of bixafen, one of the active substances in Aviator Xpro EC 225. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2015:10. Full text in Research Archive.
• Låg, Marit; Dirven, Hubert; Lyche, Jan Ludvig; Nilsen, Asbjørn Magne; Borgå, Katrine; Eklo, Ole Martin; Grung, Merete; Sverdrup, Line Emilie & Källqvist, Torsten (2015). Re-assessment of the plant protection product PROMAN – with the active ingredient metobromuron. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2015:33. Full text in Research Archive.
• Låg, Marit; Dirven, Hubert; Lyche, Jan Ludvig; Nilsen, Asbjørn Magne; Borgå, Katrine; Eklo, Ole Martin; Grung, Merete; Sverdrup, Line Emilie & Källqvist, Torsten (2015). Risk assessment of the plant protection product PROMAN – with the active ingredient metobromuron. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2015:03. Full text in Research Archive.
• Nilsen, Asbjørn Magne; Dirven, Hubert; Lyche, Jan Ludvig; Låg, Marit; Borgå, Katrine; Eklo, Ole Martin; Grung, Merete; Sverdrup, Line Emilie & Källqvist, Torsten (2015). Risk assessment of the active plant protection product ingredient MCPA (4-chloro-2methylphenoxyacetic acid). AOEL and ADI determination. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2015:04. Full text in Research Archive.
• Hjermann, Dag; Ruus, Anders; Borgå, Katrine; Gundersen, Hege; Knudsen, Halvor; Olsen, Esben Moland & Olsen, Esben Moland (2014). Tallknusing av miljøovervåkingsdata. NIVA-rapport. 6598.
• Källqvist, Torsten; Borgå, Katrine; Dirven, Hubert; Eklo, Ole Martin; Grung, Merete; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne & Sverdrup, Line Emilie (2014). Risk assessment of the biological control product “Gulløyelarver” with the active organism Chrysoperla carnea. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2014:07. Full text in Research Archive.
• Källqvist, Torsten; Borgå, Katrine; Dirven, Hubert; Eklo, Ole Martin; Grung, Merete; Lyche, Jan Ludvig; Låg, Marit; Nilsen, Asbjørn Magne & Sverdrup, Line Emilie (2014). Risk assessment of the biological plant protection products Nemasys G and Nemasys H with the active organism Heterorhabditis Bacteriophora. Opinion of the Panel on Plant Protection Products of the Norwegian Scientific Committee for Food Safety. VKM report. 2014:06. Full text in Research Archive.
• Ruus, Anders; Allan, Ian; Bæk, Kine & Borgå, Katrine (2014). Partitioning of POPs into different lipid classes.
• Ruus, Anders; Øverjordet, Ida Beathe; Braaten, Hans Fredrik Veiteberg; Anita, Evenset; Gabrielsen, Geir Wing & Borgå, Katrine (2014). Methylmercury biomagnification in an arctic food web. Show summary

  The Arctic is considered an important area for mercury accumulation, because of long-range atmospheric transport and deposition. Following transformation to organic mercury (e.g. methylmercury, MeHg) the toxicity and bioaccumulative potential in Arctic biota is high. In the International Polar Year project "Contaminants in Polar Regions" (COPOL), the aim was inter alia to study how prospective climate changes may affect the dynamics of environmental contaminants in Arctic marine food chains.This aim was addressed by scrutinising bioaccumulation of contaminants across years, seasons and locations (i.e. locations affected by Arctic or Atlantic water masses). In the COPOL project we have shown that trophic magnification of lipid soluble organohalogen contaminants may vary across species, seasons and locations in an Arctic food web. The enrichment in organic contaminant concentrations from plankton to higher trophic organisms did, for instance, increase throughout the year, and the time for concentration peak differed between plankton, fish and birds, with a delay up through the food chain. In the present work, the food web biomagnification of mercury and methylmercury, and its comparability to organic halogens, was analysed.

• Burkhard, Lawrence P.; Borgå, Katrine; Powell, David E.; Leonards, Pim; Muir, Derek C. G.; Parkerton, Thomas F. & Woodburn, Kent B. (2013). Improving the Quality and Scientific Understanding of Trophic Magnification Factors (TMFs). Environmental Science and Technology.  ISSN 0013-936X.  47(3), s 1186- 1187 . doi: 10.1021/es305253r
• Kallenborn, Roland; Borgå, Katrine; Christensen, Jesper H.; Dowdall, Mark; Odland, Jon Øyvind; Ruus, Anders; Pfaffhuber Aspmo, Katrine; Pawlak, janet & Reiersen, Lars-Otto (2012). Combined Effects of Selected Pollutants and Climate Change in the Arctic Environment.
• Borgå, Katrine & Gundersen, Hege (2009). Sårbarhetskriterier for marine arter og leveområder - Barentshavet og Lofoten. NIVA-rapport. 5859. Show summary

  I forbindelse med forvaltningsplan for Barentshavet (St.meld. nr. 8, 2005/2006) må det utvikles sårbarhetskriterier med tilhørende indikatorer for å analysere den samlete effekten av påvirkningene på definerte naturressursgrupper. NIVA arrangerte ”Workshop om sårbarhetskriterier for havområder i Barentshavet – Lofoten” 8. september 2009 ved CIENS i Oslo, der relevante forskningsmiljøer (NINA, NIVA, Akvaplan-niva, HI, NP, Aquabiota, DNV, NGU, UiO) og forvaltningsinstitusjoner (SFT og DN) var invitert. Arbeidet med utvikling av sårbarhetskriterier er omfattende, og er i oppstartsfasen både nasjonalt og internasjonalt. Følgende forslag til inndeling i påvirkningstyper ble lagt frem: I. Forurensning, II. Akuttutslipp, III. Klimaendringer, IV. Introduserte arter, V. Fysisk påvirkning, VI. Arealbeslag, VII. Høsting og bifangst, VIII. Eutrofiering og IX. Forstyrrelser. Vi anbefaler at det videre arbeidet med sårbarhetskriterier skal være enkelt, gjennomsiktig og etterprøvbart. Det er viktig at arbeidet er nasjonalt og internasjonalt forankret og at de er i overensstemmelse med internasjonale prosesser, for eksempel EUs Vanndirektiv og Havdirektiv (Marine strategier). Det anbefales at det først gjennomføres en pilot for påvirkningstypen ”Akuttutslipp”.

• Øverjordet, Ida Beathe; Berg, Torunn; Ruus, Anders; Christensen, Guttorm N.; Evenset, Anita; Borgå, Katrine; Altin, Dag; Hansen, Bjørn Henrik; Gabrielsen, Geir W. & Jenssen, Bjørn Munro (2009). Seasonal changes in mercury accumulation in zooplankton from an Arctic marine food web.
• Øverjordet, Ida Beathe; Berg, Torunn; Ruus, Anders; Christensen, Guttorm; Evenset, Anita; Borgå, Katrine; Altin, Dag; Hansen, Bjørn Henrik; Gabrielsen, Geir W. & Jenssen, Bjørn Munro (2009). Mercury accumulation in planktonic food webs from Atlantic and Arctic water masses around Spitsbergen.. Show summary

  As the global climate change is becoming more evident it is increasingly important to understand more about how these changes might affect the uptake and tropic transfer of contaminants in Arctic food webs. We have studied the accumulation of mercury in planktonic food webs from different water masses around Svalbard, and the goal was to investigate how the trophic transfer of mercury varies between Arctic and Atlantic water. Plankton samples were collected around Spitsbergen in July 2008 at four different localities, two stations in Kongsfjorden, one in Liefdefjorden and onein the Hinlopen strait. To collect only meso- and macro plankton species we used 1000 μm nets (MIK and WP3), and all samples were sorted by species using a stereomicroscope. The dominating plankton groups from which we collected samples are calanoid copepods (Calanus hyperboreus and Calanus glacialis), amphipods (Themisto libellula, Themisto abyssorum and Gammarus wilkitzkii),chaetognats (Sagitta elegans), gastropods (Limacina helicina and Clione limacine) and euphausiids (Thysanoessa inermis). The samples were lyophilized and analyzed for trace elements including totalmercury using a double focusing magnetic sector field high resolution ICP-MS (Element 2, Thermo Scientific). To assess tropic level of the respective species stable carbon and nitrogen isotopes (δ13C and δ15N) were analyzed in subsamples from each station. Preliminary results show large interspecies variation which seems to correlate with the trophic level of the species. We also see some spatial variations regarding the levels of mercury.

• Øverjordet, Ida Beathe; Berg, Torunn; Ruus, Anders; Evenset, Anita; Christensen, Guttorm; Bustnes, Jan Ove; Borgå, Katrine; Altin, Dag; Hansen, Bjørn Henrik; Gabrielsen, Geir W. & Jenssen, Bjørn Munro (2009). Mercury accumulation in planktonic food webs from Atlantic and Arctic water masses around Spitsbergen.
• Øverjordet, Ida Beathe; Kongsrud, Magnus Brunvoll; Berg, Torunn; Evenset, Anita; Christensen, Guttorm N.; Ruus, Anders; Borgå, Katrine; Gabrielsen, Geir W.; Hansen, Bjørn Henrik & Jenssen, Bjørn Munro (2009). Seasonal variation of total mercury (Hg), metallothionein and catalase in black-legged kittiwake (Rissa tridactyla).
• Ruus, Anders; Evenset, Anita; Christensen, Guttorm; Berg, Torunn; Heimstad, Eldbjørg Sofie; Bustnes, Jan Ove; Borgå, Katrine & Gabrielsen, Geir Wing (2008). COPOL - Contaminants in polar regions: Dynamic Range of contaminants in polar marine ecosystems.
• Borgå, Katrine; Gabrielsen, Geir Wing & Skåre, Janneche Utne (2003). Comparison of organochlorines between zooplankton sampled from seabirds'stomachs and from the water column.
• Borgå, Katrine; Skåre, Janneche Utne; Gulliksen, B & Gabrielsen, Geir Wing (2003). Forekomst av organiske miljøgifter i marine organismer i drivis i Barentshavet; biokonsentrasjon og biomagnifikasjon.
• Borgå, Katrine; Gabrielsen, Geir Wing; Muir, Derek C. G.; Polder, Anuschka & Skåre, Janneche Utne (2002). Determination of PCB profile, PBDEs and toxaphenes in arctic zooplankton and ice fauna.
• Borgå, Katrine; Gabrielsen, Geir Wing; Wolkers, Hans; Hop, H; Muir, Derek C. G. & Skåre, Janneche Utne (2002). Persistent organochlorines in seabirds: relation to species, diet, condition and CYP450 activity.
• Borgå, Katrine; Poltermann, Michael; Ingebrigtsen, Kristian & Gabrielsen, Geir Wing (2002). Body distribution and potential elimination of 14C-labelled PCB-31 and -110 in sea-lice amphipods.
• Borgå, Katrine; Poltermann, Michael; Gabrielsen, Geir Wing & Skåre, Janneche Utne (2002). Do Arctic ice fauna and zooplankton differ in organochlorine concentrations?.
• Borgå, Katrine & Skåre, Janneche Utne (2002). Organochlorine contaminants in Arctic marine food webs: distribution in pelagic and sympagic fauna.

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