Marit Almvik
Research Scientist
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CV Marit AlmvikBiography
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Marianne Stenrød Marit Almvik Ole Martin Eklo Anne Louise Gimsing Roger Holten Kai Künnis-Beres Mats Larsbo Linas Putelis Katri Siimes Inara Turka Jaana Uusi-KämppäAbstract
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Marit Almvik Randi Bolli Agnethe Christiansen Ole Martin Eklo Roger Holten Paulien Mulder Gunvor Senneset Marianne StenrødAbstract
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Melissa Magerøy Samuel w. Wilkinson Torstein Tengs Hugh Cross Marit Almvik Pierre Petriacq Adam Vivian-Smith Tao Zhao Carl Gunnar Fossdal Paal KrokeneAbstract
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Marit Almvik Nina Elisabeth Nagy Hans Ragnar Norli Ari Hietala Sven R. Odenmarck Monica Fongen Anas KamlehAbstract
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Ole Martin Eklo Marit Almvik Halvard Hole Åge A. Nyborg Marianne Stenrød Katrine Borgå Hubert Dirven Merete Grung Jan Ludvig Lyche Marit Låg Asbjørn Magne Nilsen Line Emilie Sverdrup Torsten KällqvistAbstract
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Marit Almvik Marianne Stenrød Randi Bolli Alice Budai Ingvill Hauso Olaug Bach Steinar Haugse Ole Martin EkloAbstract
OBJECTIVES • Gain a better understanding of the fate of pesticides in the environment by also screening and detecting their metabolites • Predict and detect pesticide metabolites in soils using high resolution accurate mass (HRAM) tools; Thermo Q Exactive orbitrap and Compound DiscovererTM software. HIGHLIGHTS • We present in silico metabolism simulation to predict fungicide metabolites in soil • We present a screening method for 800 pesticides and metabolites in soil and food, exemplified with soil samples from strawberry field degradation studies (including fluopyram, boscalid and pyraclostrobin and others) • We address the lack of molecular formulas for known metabolites in current databases as an obstacle in establishing HRAM screening methods
Authors
Marit Almvik Marianne Stenrød Randi Bolli Alice Budai Ingvill Hauso Olaug Bach Steinar Haugse Ole Martin EkloAbstract
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Field and laboratory studies show increased leaching of pesticides through macropores in frozen soil. Fast macropore flow has been shown to reduce the influence of pesticide properties on leaching, but data on these processes are scarce. The objective of this study was to investigate the effect of soil freezing and thawing on transport of pesticides with a range of soil sorption coefficients (Kf). To do this we conducted a soil column study to quantify the transport of bromide and five pesticides (2-methyl-4-chlorophenoxyacetic acid, clomazone, boscalid, propiconazole, and diflufenican). Intact topsoil and subsoil columns from two agricultural soils (silt and loam) in southeastern Norway were used in this experiment, and pesticides were applied to the soil surface in all columns. Half the columns were then frozen (−3°C), and the other half were left unfrozen (4°C). Columns were subjected to repeated irrigation events where 25 mm of rainwater was applied during 5 h at each event. Irrigations were followed by 14-d periods of freezing or refrigeration. Percolate was collected and analyzed for pesticides and bromide. Pesticide leaching was up to five orders of magnitude larger from frozen than unfrozen columns. Early breakthrough (<<1 pore volume) of high concentrations was observed for pesticides in frozen columns, indicating that leaching was dominated by preferential flow. The rank order in pesticide leaching observed in this study corresponded to the rank order of mean Kf values for the pesticides, and the results suggest that sorption plays a role in determining leaching losses even in frozen soil.
Authors
Marit Almvik Marie-Pierre Pavageau Nina Elisabeth Nagy Hans Ragnar Norli Ari Hietala Sven R. Odenmarck Monica Fongen Anas KamlehAbstract
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Ingerd Skow Hofgaard Heidi Udnes Aamot Morten Lillemo Guro Brodal Erik Lysøe Marit Almvik Anne-Grete Roer Hjelkrem Mauritz Åssveen Aina Lundon Russenes Einar Strand Åsmund Bjørnstad Helge Skinnes Selamawit Tekle Espen Sannes Sørensen Trond Buraas Alf Ceplitis Birgitte Henriksen Bernd Rodemann Simon G. EdwardsAbstract
Occasionally, high mycotoxin levels are observed in Norwegian oat grain lots. The development of moderate resistant oat cultivars is therefore highly valued in order to increase the share of high quality grain into the food and feed industry. The Norwegian SafeOats project (2016-2020) aims to develop resistance screening methods to facilitate the phase-out of Fusarium-susceptible oat germplasm. Furthermore, SafeOats will give new insight into the biology of F. langsethiae and HT2+T2 accumulation in oats. The relative ranking of oat varieties according to F. graminearum/DON versus F. langsethiae/HT2+T2 content has been explored in naturally infested as well as in inoculated field trials. Routine testing of the resistance to F. graminearum in oat cultivars and breeding lines has been conducted in Norway since 2007. We are currently working on ways to scale up the inoculum production and fine tune the methodology of F. langsethiae inoculation of field trials to be routinely applied in breeding programs. Through greenhouse studies, we have analysed the content of Fusarium DNA and mycotoxins in grains of selected oat varieties inoculated at different development stages. Furthermore, we are studying the transcriptome during F. langsethiae and F. graminearum infestation of oats. The project also focus on the occurrence of F. langsethiae in oat seeds and possible influence of the fungus on seedling development in a selection of oat varieties. On average, the fungus was observed on 5% of the kernels in 168 seed lots tested during 2016-2018. No indication of transmission of F. langsethiae from germinating seed to seedlings was found in a study with germination of naturally infected seeds. So far, the studies have shown that the ranking of oat varieties according to HT2+T2 content in non-inoculated field trials resembles the ranking observed in inoculated field trials. The ranking of oat varieties according to DON content is similar in non-inoculated and F. graminearum inoculated field trials. However, the ranking of oat varieties according to DON content does not resemble the ranking for HT2+T2. The results from SafeOats will benefit consumers nationally and internationally by providing tools to increase the share of high quality grain into the food and feed industry. The project is financed by The Foundation for Research Levy on Agricultural Products/Agricultural Agreement Research Fund/Research Council of Norway with support from the industry partners Graminor, Lantmännen, Felleskjøpet Agri, Felleskjøpet Rogaland & Agder, Fiskå Mølle Moss, Norgesmøllene, Strand Unikorn/Norgesfôr and Kimen Seed Laboratory.
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Marit AlmvikAbstract
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Roger Holten Frederik Bøe Marit Almvik Sheela Katuwal Marianne Stenrød Mats Larsbo Nicholas Jarvis Ole Martin EkloAbstract
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Roger Holten Frederik Bøe Marit Almvik Marianne Stenrød Mats Larsbo Nicholas Jarvis Ole Martin EkloAbstract
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Ole Martin Eklo Jens Kværner Eivind Solbakken Marianne Stenrød Roar Lågbu Randi Bolli Marit Almvik Sven R. Odenmarck Ivar Solberg Stein SorknesAbstract
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Roger Holten Frederik Bøe Marit Almvik Sheela Katuwal Marianne Stenrød Mats Larsbo Nicholas Jarvis Ole Martin EkloAbstract
Limited knowledge and experimental data exist on pesticide leaching through partially frozen soil. The objective of this study was to better understand the complex processes of freezing and thawing and the effects these processes have on water flow and pesticide transport through soil. To achieve this we conducted a soil column irrigation experiment to quantify the transport of a non-reactive tracer and the herbicide MCPA in partially frozen soil. In total 40 intact topsoil and subsoil columns from two agricultural fields with contrasting soil types (silt and loam) in South-East Norway were used in this experiment. MCPA and bromide were applied on top of all columns. Half the columns were then frozen at −3 °C while the other half of the columns were stored at +4 °C. Columns were then subjected to repeated irrigation events at a rate of 5 mm artificial rainwater for 5 h at each event. Each irrigation was followed by 14-day periods of freezing or refrigeration. Percolate was collected and analysed for MCPA and bromide. The results show that nearly 100% more MCPA leached from frozen than unfrozen topsoil columns of Hov silt and Kroer loam soils. Leaching patterns of bromide and MCPA were very similar in frozen columns with high concentrations and clear peaks early in the irrigation process, and with lower concentrations leaching at later stages. Hardly any MCPA leached from unfrozen topsoil columns (0.4–0.5% of applied amount) and concentrations were very low. Bromide showed a different flow pattern indicating a more uniform advective-dispersive transport process in the unfrozen columns with higher con- centrations leaching but without clear concentration peaks. This study documents that pesticides can be pre- ferentially transported through soil macropores at relatively high concentrations in partially frozen soil. These findings indicate, that monitoring programs should include sampling during snow melt or early spring in areas were soil frost is common as this period could imply exposure peaks in groundwater or surface water.
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Roger Holten Frederik Bøe Marit Almvik Marianne Stenrød Mats Larsbo Nicholas Jarvis Ole Martin EkloAbstract
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Ole Martin Eklo Jens Kværner Eivind Solbakken Marianne Stenrød Roar Lågbu Randi Bolli Marit Almvik Sven R. Odenmarck Ivar Solberg Stein SorknesAbstract
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Roger Holten Frederik Bøe Marit Almvik Marianne Stenrød Mats Larsbo Nicholas Jarvis Ole Martin EkloAbstract
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Marit AlmvikAbstract
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Marit Almvik Marianne Stenrød Ole Martin Eklo Nina Holteberg Paulien Jakobje Mulder Roger Holten Roger RosethAbstract
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Marianne Stenrød Marit Almvik Ole Martin Eklo Anne Louise Gimsing Roger Holten Kai Künnis-Beres Mats Larsbo Linas Putelis Katri Siimes Inara Turka Jaana Uusi-KämppäAbstract
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Yanliang Wang Marit Almvik Nicholas Clarke Susanne Eich-Greatorex Anne Falk Øgaard Tore Krogstad Hans Lambers Jihong Liu ClarkeAbstract
Phosphorus (P) is an important element for crop productivity and is widely applied in fertilizers. Most P fertilizers applied to land are sorbed onto soil particles, so research on improving plant uptake of less easily available P is important. In the current study, we investigated the responses in root morphology and root-exuded organic acids (OAs) to low available P (1 mM P) and sufficient P (50 mM P) in barley, canola and micropropagated seedlings of potato— three important food crops with divergent root traits, using a hydroponic plant growth system.We hypothesized that the dicots canola and tuber-producing potato and the monocot barley would respond differently under various P availabilities. WinRHIZO and liquid chromatography triple quadrupole mass spectrometry results suggested that under low P availability, canola developed longer roots and exhibited the fastest root exudation rate for citric acid. Barley showed a reduction in root length and root surface area and an increase in root-exudedmalic acid under low-P conditions. Potato exuded relativelysmall amounts of OAs under low P, while therewas a marked increase in root tips. Based on the results, we conclude that different crops show divergent morphological and physiological responses to low P availability, having evolved specific traits of root morphology and root exudation that enhance their P-uptake capacity under low-P conditions. These results could underpin future efforts to improve P uptake of the three crops that are of importance for future sustainable crop production.
Authors
Ole Martin Eklo Marit Almvik Halvard Hole Åge A. Nyborg Marianne Stenrød Katrine Borgå Hubert Dirven Merete Grung Jan Ludvig Lyche Marit Låg Asbjørn Magne Nilsen Line Emilie Sverdrup Torsten KällqvistAbstract
No abstract has been registered
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Marit Almvik Randi Bolli Agnethe Christiansen Ole Martin Eklo Roger Holten Paulien Jakobje Mulder Gunvor Senneset Marianne StenrødAbstract
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Marit Almvik Randi Bolli Agnethe Christiansen Ole Martin Eklo Roger Holten Paulien Mulder Gunvor Senneset Marianne StenrødAbstract
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Marit Almvik Randi Bolli Agnethe Christiansen Ole Martin Eklo Roger Holten Paulien Jakobje Mulder Gunvor SennesetAbstract
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Yan-liang Wang Sissel Haugslien Marit Almvik Nicholas Clarke Anne Falk Øgaard Jihong Liu ClarkeAbstract
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Yanliang Wang Sissel Haugslien Marit Almvik Nicholas Clarke Anne Falk Øgaard Jihong Liu ClarkeAbstract
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Yanliang Wang Sissel Haugslien Marit Almvik Nicholas Clarke Anne Falk Øgaard Jihong Liu ClarkeAbstract
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Yanliang Wang Sissel Haugslien Marit Almvik Nicholas Clarke Anne Falk Øgaard Jihong Liu ClarkeAbstract
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Marit AlmvikAbstract
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Yanliang Wang Sissel Haugslien Marit Almvik Nicholas Clarke Anne Falk Øgaard Jihong Liu ClarkeAbstract
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Marit AlmvikAbstract
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Marit Almvik Gunnhild Riise Randi Bolli Trond Børresen Agnethe Christiansen Sven R. Odenmarck Roger HoltenAbstract
The report presents the results from multi-year field studies of transport of the sulfonylurea herbicides tribenuron-methyl and amidosulfuron in a barley field in Norway. A method for sample preparation of water samples and LC-MS/MS analysis of 6 sulfonylurea herbicides tribenuron-methyl, amidosulfuron, metsulfuron-methyl, iodosulfuron-methyl, thifensulfuron-methyl, rimsulfuron) and 5 degradation products (INL5296, INA4098, AEF101630, IN70941, IN70942) is also described.
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Organochlorine pollutants in the major fish species (pike Esox lucius, perch Perca fluviatilis, and roach Rutilus rutilus) of Lake Arungen, Norway, were investigated after an extensive removal of large pike in 2004. The organochlorine pollutants detected in fish liver samples in 2005 were dichlorodiphenyltrichloroethane (DDTs), polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), and heptachlor epoxide (HCE). DDTs were the dominant among all analyzed OCs. Sigma PCB and HCB, detected in fish from two clearly distinct trophic levels (prey and predators), give an indication of biontagnification. All OC concentrations in female pike were significantly lower compared to males, which might be due to the removal of high concentrations of pollutants in roe during spawning. (c) 2009 Elsevier Ltd. All rights reserved.
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Ole Martin Eklo Marit Almvik Randi Bolli Trond Børresen Terje Haraldsen Lars Egil Haugen Roger Holten Gunnhild RiiseAbstract
This is a final report for the project Norwegian Scenarios II, part two, that has been performed in collaboration between Bioforsk Plant Health and Plant Protection, The Norwegian University of Life Sciences and the Norwegian Food Safety Authority. The aim of the project was to establish Norwegian scenarios for the models PRZM and MACRO and to use them for approval of new pesticides.
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Marianne Stenrød J Perceval P Benoit Marit Almvik Randi Bolli Ole Martin Eklo Tore E. Sveistrup Jens KværnerAbstract
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Marit Almvik Gunnhild Riise Randi Bolli Agnethe Christiansen Sven R. Odenmarck Trond Børresen Cathrine Waage TveitAbstract
Although the sulfonylurea herbicides have been used for many years worldwide, few field studies have been performed and little is known about the occurrence, fate and transport of sulfonylureas in the field. This report presents results from the first controlled field and laboratory-studies on the fate of sulfonylurea herbicides in Norway and a method for sample preparation and LC-MS/MS analysis of sulfonylurea herbicides in water samples is also presented.
