Now showing items 1-20 of 706

    • Resipientgransking ved Tjeldbergodden - Aure i Møre og Romsdal 

      Golmen, Lars Gunder (NIVA-rapport;2647, Research report, 1991)
      Det foreligg planer om etablering av gasskraftverk og matanolfabrikk på Tjeldbergodden på Nordmøre. NIVA har i denne samanheng på oppdrag frå STATKRAFT gjennomført målingar i sjøresipienten i løpet av 1990 og 1991. Det er ...
    • Sætersjøen i Nord-Odal: En undersøkelse av vannkvalitet med resipientvurdering i 2008 

      Løvik, Jarl Eivind (NIVA-rapport;5691-2008, Research report, 2008)
      På grunnlag av undersøkelser i 2008 kan Sætersjøen karakteriseres som en grunn, markert humuspåvirket, kalkfattig og næringsfattig innsjø med lave konsentrasjoner av næringsstoffer og små algemengder. Vannkvaliteten kan ...
    • In Inland China, Rice, Rather than Fish, Is the Major Pathway for Methylmercury Exposure 

      Zhang, Hua; Feng, Xinbin; Larssen, Thorjørn; Qiu, Guangle; Vogt, Rolf David (Journal article; Peer reviewed, 2010)
      Background: Fish consumption is considered the primary pathway of methylmercury (MeHg) exposure for most people in the world. However, in the inland regions of China, most of the residents eat little fish, but they live ...
    • Polychaetes from Jan Mayen (Annelida, Polychaeta) 

      Bakken, Torkild; Kongsrud, Jon Anders; Oug, Eivind; Cochrane, Sabine; Moen, Toril Loennechen; Solbakken, Beata Elisabeth Borowiec (Journal article; Peer reviewed, 2010)
      A thorough literature review has been undertaken to establish the first complete account of polychaetes recorded from the area around the volcanic island of Jan Mayen. The annotated checklist lists 121 species-level taxa, ...
    • Risiko for forurensing av råvannet til Oppegård vannverk ved akuttutslipp til Gjersjøen 

      Aanes, Karl Jan; Tjomsland, Torulv; Tryland, Ingun; Vogelsang, Christian (NIVA-rapport;5932, Research report, 2010)
      Rapporten beskriver mulige farer for forurensing av råvannet til Oppegård vannverk i Akershus ved akutt utslipp til Gjersjøen. Det er lagt vekt på å studere virkninger av utslipp som følge av uhell på vei i forbindelse ...
    • Seasonal variation in marine C:N:P stoichiometry: can the composition of seston explain stable Redfield ratios? 

      Frigstad, Helene; Andersen, Tom; Hessen, Dag Olav; Naustvoll, L..J.; Johnsen, Torbjørn Martin; Bellerby, Richard (Journal article; Peer reviewed, 2011)
      Seston is suspended particulate organic matter, comprising a mixture of autotrophic, heterotrophic and detrital material. Despite variable proportions of these components, marine seston often exhibits relatively small ...
    • Påvirkes laksesmolt av aluminium i brakkvann?Telemetriundersøkelser i Storelva i Holt, Aust-Agder,2007 

      Kroglund, Frode; Høgberget, Rolf; Haraldstad, Tormod; Økland, Finn; Thorstad, Eva Bonsak; Teien, Hans-Christian; Rosseland, Bjørn Olav; Salbu, Brit; Nilsen, Tom Ole; Stefansson, Sigurd Olav; Guttrup, Jim (NIVA-rapport;6245, Research report, 2011)
      Storelva har vært fullkalket siden 1996. Kalkingen har ikke gitt den forventede økningen i fangst av laks. Vassdraget avviker således fra erfaringene man har fra andre kalka elver på Sørlandet. Flere hypoteser er ...
    • Påvirkes laksesmolt av aluminium i brakkvann?Telemtriundersøkelser Storelva i Holt, Aust-Agder,2008 

      Kroglund, Frode; Høgberget, Rolf; Haraldstad, Tormod; Økland, Finn; Thorstad, Eva Bonsak; Teien, Hans-Christian; Rosseland, Bjørn Olav; Salbu, Brit; Nilsen, Tom Ole; Stefansson, Sigurd Olav; Guttrup, Jim (NIVA-rapport;6246, Research report, 2011)
      Fangsten av laks i Storelva i Holt er lavere enn forventet. Flere hypoteser er forkastet. De senere årene har fokus vært på: vil aluminium i brakkvann kunne hemme smoltens utvandring fra elv til hav? I 2007 og 2008 ...
    • Monitoring marine populations and communities: methods dealing with imperfect detectability 

      Katsanevakis, Stelios; Smit, Anke Weber; Pipitone, Carlo; Leopold, Mardik; Cronin, Michelle; Scheidat, Meike; Doyle, Thomas K.; Buhl-Mortensen, Lene; Buhl-Mortensen, Pål; D'Anna, Giovanni; de Boois, Ingeborg; Dalpadado, Padmini; Damalas, Dimitrios; Fiorentino, Fabio; Garofalo, Germana; Giacalone, Vincenzo Maximiliano; Hawley, Kate; Issaris, Yiannis; Jansen, Jeroen; Rosten, Carolyn; Knittweis, Leyla; Kröncke, Ingrid; Mirto, Simone; Muxika, Iñigo; Reiss, Henning; Skjoldal, Hein Rune; Vöge, Sandra (Journal article, 2012)
    • Impact of an icy winter on the Pacific oyster (Crassostrea gigas Thunberg, 1793) populations in Scandinavia 

      Strand, Åsa; Blanda, Elisa; Bodvin, Torjan; Davids, Jens K.; Jensen, Lasse Fast; Holm-Hansen, Tore Hejl; Jelmert, Anders; Lindegarth, Susanne; Mortensen, Stein; Moy, Frithjof Emil; Nielsen, Pernille; Norling, Pia Carina; Nyberg, Carlo; Christensen, Helle Torp; Vismann, Bent; Holm, Mark Wejlemann; Hansen, Benni Winding; Dolmer, Per (Journal article; Peer reviewed, 2012)
      The Pacific oyster (Crassostrea gigas) is an invasive species that has dispersed into Scandinavia during the last few decades. The objective of this study was to evaluate the effects of extreme winter conditions on the ...
    • Environmental impacts of produced water and drilling waste discharges from the Norwegian offshore petroleum industry 

      Bakke, Torgeir Heggelund; Klungsøyr, Jarle; Sanni, Steinar (Journal article; Peer reviewed, 2013)
      Operational discharges of produced water and drill cuttings from offshore oil and gas platforms are a continuous source of contaminants to continental shelf ecosystems. This paper reviews recent research on the biological ...
    • Faunal trophic structure at hydrothermal vents on the southern Mohn's Ridge, Arctic Ocean 

      Sweetman, Andrew Kvassnes; Levin, Lisa; Rapp, Hans Tore; Schander, Christoffer (Journal article; Peer reviewed, 2013)
      We explore the trophic ecology of heterotrophic fauna associated with a high temperature (HT) vent, 2 low temperature vents, a ‘near-HT vent’ habitat and a non-vent site situated at upper bathyal depths on the southern ...
    • Lack of sea urchin settlement may explain kelp forest recovery in overgrazed areas in Norway 

      Fagerli, Camilla With; Norderhaug, Kjell Magnus; Christie, Hartvig C (Journal article; Peer reviewed, 2013)
      In this study, we investigated whether failure of sea urchin recruitment can explain an ongoing phase shift from overgrazed, barren grounds to kelp forests along the coast of mid- Norway. Settlement of sea urchins on ...
    • From Green to Red: Horizontal Gene Transfer of the Phycoerythrin Gene Cluster between Planktothrix Strains 

      Tooming-Klunderud, Ave; Sogge, Hanne; Rounge, Trine Ballestad; Nederbragt, Alexander Johan; Lagesen, Karin; Glöckner, Gernot; Hayes, Paul K; Rohrlack, Thomas; Jakobsen, Kjetill Sigurd (Journal article; Peer reviewed, 2013)
      Horizontal gene transfer is common in cyanobacteria, and transfer of large gene clusters may lead to acquisition of new functions and conceivably niche adaption. In the present study, we demonstrate that horizontal gene ...
    • Gene Flow, Recombination, and Selection in Cyanobacteria: Population Structure of Geographically Related Planktothrix Freshwater Strains 

      Sogge, Hanne; Rohrlack, Thomas; Rounge, Trine Ballestad; Sønstebø, Jørn Henrik; Tooming-Klunderud, Ave; Kristensen, Tom; Jakobsen, Kjetill Sigurd (Journal article; Peer reviewed, 2013)
      Several Planktothrix strains, each producing a distinct oligopeptide profile, have been shown to coexist within Lake Steinsfjorden (Norway). Using nonribosomal peptide synthetase (NRPS) genes as markers, it has been shown ...
    • Optical water types of the Nordic Seas and adjacent areas 

      Aas, Eyvind; Højerslev, Niels Kristian; Høkedal, Jo; Sørensen, Kai (Journal article; Peer reviewed, 2013)
      A new map of Jerlov's optical water types in the Nordic Seas and adjacent waters at 139 locations, as well as a table with statistical and geographical properties of the vertical attenuation coefficient of downward irradiance ...
    • Transgenic (cyp19a1b-GFP) zebrafish embryos as a tool for assessing combined effects of oestrogenic chemicals 

      Petersen, Karina; Fetter, Eva; Kah, Olivier; Brion, François; Scholz, Stefan; Tollefsen, Knut-Erik (Journal article; Peer reviewed, 2013)
      Endocrine disrupting chemicals and especially oestrogen receptor (ER) agonists have been extensively studied over the years due to their potential effects on sexual development and reproduction in vertebrates, notably fish. ...
    • Pesticide risk assessment and management in a globally changing world—report from a European interdisciplinary workshop 

      Babut, Marc; Arts, Gertie H.; Caracciolo, Anna Barra; Carluer, Nadia; Domange, Nicolas; Friberg, Nikolai; Gouy, Vèronique; Grung, Merete; Lagadick, Laurent; Martin-Laurent, Fabrice; Mazzella, Nicolas; Pesce, Stèphane; Real, Benoit; Reichenberger, Stefan; Roex, Erwin W. M.; Romijn, Kees; Röttele, Manfred; Stenrød, Marianne; Tounebize, Julien; Vernier, Francoise; Vindimian, Eric (Journal article; Peer reviewed, 2013)
    • Contrasting responses of DMS and DMSP to ocean acidification in Arctic waters 

      Archer, S.D.; Kimmance, S.A.; Stephens, J.A.; Hopkins, F.E.; Bellerby, Richard; Schulz, K.G.; Piontek, J.; Engel, A. (Journal article; Peer reviewed, 2013)
      Increasing atmospheric CO2 is decreasing ocean pH most rapidly in colder regions such as the Arctic. As a component of the EPOCA (European Project on Ocean Acidification) pelagic mesocosm experiment off Spitzbergen in 2010, ...
    • Passive sampling methods for contaminated sediments: risk assessment and management 

      Greenberg, M.S.; Chapman, P.M.; Allan, Ian; Anderson, K.A.; Apitz, S.E.; Beegan, C.; Bridges, T.S.; Brown, S.S.; Cargill, J.G.; McCulloch, M.C.; Menzie, CA; Shine, J.P.; Parkerton, T.F. (Journal article; Peer reviewed, 2013)
      This paper details how activity-based passive sampling methods (PSMs), which provide information on bioavailability in terms of freely dissolved contaminant concentrations (Cfree), can be used to better inform risk management ...