Blar i Published externally på forfatter "Naustvoll, Lars-Johan"
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Correcting for underestimation of microzooplankton grazing in bottle incubation experiments with mesozooplankton
Nejstgaard, Jens Christian; Naustvoll, Lars-Johan; Sazhin, Andrey (Journal article; Peer reviewed, 2001-10-18)Bottle incubation experiments are widely used in mesozooplankton grazing studies. However, we have shown here that traditional particle removal experiments with Calanus finmarchicus and C. helgolandicus as grazers on ... -
Extension of the match-mismatch hypothesis to predator-controlled systems
Durant, Joël M.; Hjermann, Dag Ø.; Falkenhaug, Tone; Gifford, Dian J.; Naustvoll, Lars-Johan; Sullivan, Barbara K.; Beaugrand, Grégory; Stenseth, Nils Christian (Journal article; Peer reviewed, 2013-01-31)Differential change in the phenology of predators and prey is a potentially important climate-mediated mechanism influencing populations. The match-mismatch hypothesis describes the effect of predator-prey population ... -
Grazing by the heterotrophic dinoflagellate Protoperidinium steinii on a Ceratium bloom
Olseng, Christine Daae; Naustvoll, Lars-Johan; Paasche, Eystein (Journal article; Peer reviewed, 2002-01-11)Variations in heterotrophic dinoflagellate populations at a station in the inner Oslofjord, Norway, were studied by sampling at ca 4 d intervals. Cells were concentrated from 1 l samples by filtration before being counted ... -
Marine indikatorer
van der Meeren, Gro; Øigård, Tor Arne; Øien, Nils; Nilssen, Kjell Tormod; Oug, Eivind; Sunnanå, Knut; Jakobsen, Tore; Mehl, Sigbjørn; Kvamme, Cecilie; Torstensen, Else; Stenevik, Erling Kåre; Planque, Benjamin; Helle, Gunnar; Gjøsæter, Jakob; Skiftesvik, Anne Berit; Aglen, Asgeir; Johannessen, Tore; Dommasnes, Are; Naustvoll, Lars-Johan; Moy, Frithjof E.; Falkenhaug, Tone; Melle, Webjørn; Knutsen, Tor; Eriksen, Elena; Jørgensen, Lis Lindal; Fosså, Jan Helge; Bannister, Raymond; Buhl-Mortensen, Lene; Buhl-Mortensen, Pål; Strand, Øivind; Søvik, Guldborg; Jelmert, Anders; Knutsen, Jan Atle; Enersen, Svein Erik; Edvardsen, Hanne; Kroglund, Tone; Pedersen, Atle; Eikrem, Wenche; Bekkby, Trine; Tveite, Stein (DN-utredning;4-2010, Chapter, 2010-09)The Nature Index (NI) is established to get an overview of the state and development of biodiversity within the major ecosystems of Norway. It includes marine, limnic and terrestrial ecosystems. The aim of the index is to ... -
Spring bloom nutrient dynamics in the Oslofjord
Kristiansen, Svein; Farbrot, Tove; Naustvoll, Lars-Johan (Journal article; Peer reviewed, 2001-09-10)Primary production and uptake rates of ammonium, nitrate and silicic acid were measured during the 1996 spring bloom in the Oslofjord, southern Norway, using isotope methodology (14C, 15N and 32Si). Chlorophyll a (chl a) ... -
Zooplankton growth, diet and reproductive success compared in simultaneous diatom- and flagellatemicrozooplankton-dominated plankton blooms
Nejstgaard, Jens Christian; Hygum, Bent Hansen; Naustvoll, Lars-Johan (Journal article; Peer reviewed, 2001-10-18)Development of mesozooplankton biomass, feeding activity and reproductive success of the copepod Calanus helgolandicus were compared in blooms of natural plankton in 7 mesocosms on the west coast of Norway between 28 August ...