A5047989124- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Indigenous Studies and Ecology
- European and International Law Studies
- Marine Toxins and Detection Methods
- Marine and fisheries research
- Fish Ecology and Management Studies
- Microbial Community Ecology and Physiology
- Marine Bivalve and Aquaculture Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Arctic and Russian Policy Studies
- Environmental DNA in Biodiversity Studies
- Soil and Water Nutrient Dynamics
- Isotope Analysis in Ecology
- Protist diversity and phylogeny
- Coastal and Marine Management
- Integrated Water Resources Management
- Education, Healthcare and Sociology Research
- Oceanographic and Atmospheric Processes
- Municipal Solid Waste Management
- Microplastics and Plastic Pollution
- Food Industry and Aquatic Biology
- Research in Social Sciences
- Food Waste Reduction and Sustainability
- Marine and environmental studies
Norwegian Institute of Marine Research
2012-2024
Novo Nordisk (Denmark)
2019
University of Gothenburg
2019
Göteborgs Stads
2019
University of Oslo
1998-2011
AgResearch
2004
Institute for Marine Biosciences
2004
UiT The Arctic University of Norway
2001
Harmful algal blooms (HAB) are recurrent phenomena in northern Europe along the coasts of Baltic Sea, Kattegat-Skagerrak, eastern North Norwegian Sea and Barents Sea. These HABs have caused occasional massive losses for aquaculture industry chronically affected socioeconomic interests several ways. This status review gives an overview historical HAB events summarises reports to Algae Event Database from 1986 end year 2019 observations made long term monitoring programmes potentially harmful...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 221:59-75 (2001) - doi:10.3354/meps221059 Correcting for underestimation of microzooplankton grazing in bottle incubation experiments with mesozooplankton Jens C. Nejstgaard1,*, Lars-Johan Naustvoll2, Andrey Sazhin3 1Department Fisheries and Biology, University Bergen, Bergen High Technology Center, PO Box...
Dinophysis acuminata produces Diarrhetic Shellfish Toxins (DST) that contaminate natural and farmed shellfish, leading to public health risks economically impacting mussel farms. For this reason, there is a high interest in understanding predicting D. blooms. This study assesses the environmental conditions develops sub-seasonal (7 - 28 days) forecast model predict cells abundance Lyngen fjord located northern Norway. A Support Vector Machine (SVM) trained future by using past cell...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 221:77-91 (2001) - doi:10.3354/meps221077 Zooplankton growth, diet and reproductive success compared in simultaneous diatom- flagellate-microzooplankton-dominated plankton blooms Jens C. Nejstgaard1,*, Bent Hansen Hygum2, Lars-Johan Naustvoll3, Ulf Båmstedt1 1Department of Fisheries Biology, University...
Two novel pectenotoxins (PTXs) were detected by LC-MS in solid phase extracts of net hauls taken at Flødevigen, Norway, June 2002 that dominated Dinophysis acuminata and norvegica. The new compounds isolated as minor components from a large collection acuta-dominated bloom obtained Skjer, Sognefjorden, October 2002. NMR analyses revealed the components, 36S-PTX-12 36R-PTX-12, occurred pair equilibrating diastereoisomers differing PTX-2 they contained an exocylic olefinic methylene rather...
Abstract. Seston is suspended particulate organic matter, comprising a mixture of autotrophic, heterotrophic and detrital material. Despite variable proportions these components, marine seston often exhibits relatively small deviations from the Redfield ratio (C:N:P = 106:16:1). Two time-series Norwegian shelf in Skagerrak are used to identify drivers seasonal variation elemental ratios. An ordination identified water mass characteristics bloom dynamics as most important for determining C:N,...
The Pacific oyster Crassostrea gigas has recently expanded its range in Scandinavia. expansion is presumably a result of northwards larval drift. Massive settlements were recorded many areas along the Swedish west coast and southern Norway 2013 2014. After spawning season 2014, temperature surface water peaked at 24-26°C. this period, high sudden mortalities occurred hatchery wild populations south Norway. Surveys collected data showed that mainly during 3 wk September. All size classes...
Global coastal ecosystems are under accelerating pressure from human activities and climate change. In this study we explore a long-term time series (mostly 1990–2016) major Norwegian rivers, together with the Skagerrak coast. The aims to: 1) analyse trends in riverine loadings to Skagerrak, changes water quality pelagic benthic species composition, 2) describe relationships between drivers (eutrophication darkening) community structure of communities. Riverine discharge transport increased...
Harmful algal blooms (HABs) represent a growing global challenge, threatening human, environmental, and animal health, while also causing substantial social economic impacts. Certain species produce potent toxins that can accumulate in marine organisms eventually enter the human food chain, potentially variety of illnesses. High-biomass HABs deplete ocean oxygen, hydrogen sulfide, lead to massive fish kills, including aquaculture sites. In addition, impact on desalination plants, conducting...
Since 1998, a heterokont flagellate initially named Chattonella aff . verruculosa has formed recurrent extensive blooms in the North Sea and Skagerrak, causing fish mortalities. Cells were isolated from 2001 bloom off south coast of Norway, monoalgal cultures established compared with Y. Hara et Chihara reference strain NIES 670 Japan. The cells Norwegian cultured isolates very variable size form, being large oblong (up to 34 μm long) small rounded (5–9 diameter) two unequal flagella,...
Laboratory experiments were conducted to determine prey size spectrum and food preference in the thecate heterotrophic dinoflagellates Protoperidinium pallidum, P. steinii, Zygabikodinium lenticulatum. Algal cultures of different taxonomic groups offered as prey. In addition observations feeding, growth rate was used a measure quality for population maintenance. The two species show some degree niche differentiation, with types. pallidum showed diatoms over dinoflagellates, only diatom able...
Climate change is expected to affect food and feed safety, including the occurrence of natural toxins in primary crop seafood production; however, date, quantitative estimates are scarce. This study aimed estimate impact climate effects on mycotoxin contamination cereal grains cultivated terrestrial area north west Europe, frequency harmful algal blooms shellfish with marine biotoxins North Sea coastal zone. The focused wheat deoxynivalenol, abundance Dinophysis spp. possible relationship...
Abstract Johannessen, T., Dahl, E., Falkenhaug, and Naustvoll, L. J. 2012. Concurrent recruitment failure in gadoids changes the plankton community of Norwegian Skagerrak coast after 2002. – ICES Journal Marine Science, 69: 795–801. Since 1919, annual beach-seine sampling has been carried out along with main objective measuring abundance 0-group gadoids. Repeated incidents abrupt persistent collapses gadoid populations have observed locally. These linked to gradual eutrophication, which...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 474:43-52 (2013) - DOI: https://doi.org/10.3354/meps10089 Extension of match-mismatch hypothesis predator-controlled systems Joël M. Durant1,*, Dag Ø. Hjermann1,7, Tone Falkenhaug2, Dian J. Gifford3, Lars-Johan Naustvoll2, Barbara K. Sullivan3, Grégory Beaugrand4,5, Nils Chr. Stenseth1,2,6 1Centre for...
The accumulation of phycotoxins in bivalve mussels associated with feeding on toxic phytoplankton is a well-known phenomenon Norway. Regular monitoring for 25 years has revealed that Diarrhetic Shellfish poisoning (DSP) toxins the main phycotoxin problem along Norwegian coast. aim this study was to evaluate possible trends over time Dinophysis spp. and DSP as well correlation between abundance toxin mussels, based intensive regular at southern coast Norway Flødevigen Bay. source organism...
The thecate heterotrophic dinoflagellate Diplopsalis lenticula Bergh was shown to feed on a wide range of phytoplankton different size and taxonomic groups. Growth ingestion rates D. lenricula feeding the diatom Ditylum brightwellii (West) Grunow were measured as function food concentration. rate increased with concentration until it reached saturation at c. 300 cells ml−1. Maximum specific growth 0.25 d−1 500 A prey low 30 ml−1 supported growth. Ingestion clearance estimated by two methods...