• Alien plants, animals, fungi and algae in Norway: an inventory of neobiota 

      Sandvik, Hanno; Dolmen, Dag; Elven, Reidar; Falkenhaug, Tone; Forsgren, Elisabet; Hansen, Haakon; Hassel, Kristian; Husa, Vivian; Kjærstad, Gaute; Ødegaard, Frode; Pedersen, Hans Christian; Solheim, Halvor; Stokke, Bård Gunnar; Åsen, Per Arvid; Åström, Sandra Charlotte Helene; Brandrud, Tor Erik; Elven, Hallvard; Endrestøl, Anders; Finstad, Anders Gravbrøt; Fredriksen, Stein; Gammelmo, Øivind; Gjershaug, Jan Ove; Gulliksen, Bjørn; Hamnes, Inger Sofie; Hatteland, Bjørn Arild; Hegre, Hanne; Hesthagen, Trygve H.; Jelmert, Anders; Jensen, Thomas Correll; Johnsen, Stein Ivar; Karlsbakk, Egil; Magnusson, Christer; Nedreaas, Kjell Harald; Nordén, Björn; Oug, Eivind; Pedersen, Oddvar; Pedersen, Per Anker; Sjøtun, Kjersti; Skei, Jon Kristian; Solstad, Heidi; Sundheim, Leif; Swenson, Jon; Syvertsen, Per Ole; Talgø, Venche; Vandvik, Vigdis; Westergaard, Kristine Bakke; Wienerroither, Rupert; Ytrehus, Bjørnar; Hilmo, Olga; Henriksen, Snorre; Gederaas, Lisbeth (Journal article; Peer reviewed, 2019)
      We present the results of an inventory and status assessment of alien species in Norway. The inventory covered all known multicellular neobiota, 2496 in total, 1039 of which were classified as naturalised. The latter ...
    • Alien species in Norway: results from quantitative ecological impact assessments 

      Sandvik, Hanno; Hilmo, Olga; Henriksen, Snorre; Elven, Reidar; Åsen, Per Arvid; Hegre, Hanne; Pedersen, Oddvar; Pedersen, Per Anker; Solstad, Heidi; Vandvik, Vigdis; Westergaard, Kristine Bakke; Ødegaard, Frode; Åström, Sandra Charlotte Helene; Elven, Hallvard; Endrestøl, Anders; Gammelmo, Øivind; Hatteland, Bjørn Arild; Solheim, Halvor; Nordén, Björn; Sundheim, Leif; Talgø, Venche; Falkenhaug, Tone; Gulliksen, Bjørn; Jelmert, Anders; Oug, Eivind; Sundet, Jan Henry; Forsgren, Elisabet; Finstad, Anders Gravbrøt; Hesthagen, Trygve H.; Nedreaas, Kjell Harald; Wienerroither, Rupert; Husa, Vivian; Fredriksen, Stein; Sjøtun, Kjersti; Steen, Henning; Hansen, Haakon; Hamnes, Inger Sofie; Karlsbakk, Egil; Magnusson, Christer; Ytrehus, Bjørnar; Pedersen, Hans Christian; Swenson, Jon; Syvertsen, Per Ole; Stokke, Bård Gunnar; Gjershaug, Jan Ove; Dolmen, Dag; Kjærstad, Gaute; Johnsen, Stein Ivar; Jensen, Thomas Correll; Hassel, Kristian; Gederaas, Lisbeth (Journal article, 2020)
      1. Due to globalisation, trade and transport, the spread of alien species is increasing dramatically. Some alien species become ecologically harmful by threatening native biota. This can lead to irreversible changes in ...
    • Amphibian recovery after a decrease in acidic precipitation 

      Dolmen, Dag; Finstad, Anders Gravbrøt; Skei, John K. (Journal article, 2017)
      We here report the first sign of amphibian recovery after a strong decline due to acidic precipitation over many decades and peaking around 1980–90. In 2010, the pH level of ponds and small lakes in two heavily acidified ...
    • Catchment vegetation and temperature mediating trophic interactions and production in plankton communities 

      Finstad, Anders Gravbrøt; Nilsen, Erlend Birkeland; Hendrichsen, Ditte Katrine; Schmidt, Niels M. (Journal article; Peer reviewed, 2017)
      Climatic factors influence the interactions among trophic levels in an ecosystem in multiple ways. However, whereas most studies focus on single factors in isolation, mainly due to interrelation and correlation among drivers ...
    • Community structure affects trophic ontogeny in a predatory fish 

      Sanchez-Hernandez, Javier; Eloranta, Antti; Finstad, Anders Gravbrøt; Amundsen, Per-Arne (Journal article; Peer reviewed, 2017)
      While most studies have focused on the timing and nature of ontogenetic niche shifts, information is scarce about the effects of community structure on trophic ontogeny of top predators. We investigated how community ...
    • Contrasting spatial, temporal and environmental patterns in observation and specimen based species occurrence data 

      Speed, James David Mervyn; Bendiksby, Mika; Finstad, Anders Gravbrøt; Hassel, Kristian; Kolstad, Anders Lorentzen; Prestø, Tommy (Journal article; Peer reviewed, 2018)
      Species occurrence data records the location and time of an encounter with a species, and is valuable for many aspects of ecological and evolutionary analyses. A key distinction within species occurrence data is between ...
    • Contrasting spatial, temporal and environmental patterns in observation and specimen based species occurrence data 

      Speed, James David Mervyn; Bendiksby, Mika; Finstad, Anders Gravbrøt; Hassel, Kristian; Kolstad, Anders Lorentzen; Prestø, Tommy (Journal article; Peer reviewed, 2018)
      Species occurrence data records the location and time of an encounter with a species, and is valuable for many aspects of ecological and evolutionary analyses. A key distinction within species occurrence data is between ...
    • Drivers of diet patterns in a globally distributed freshwater fish species 

      Javier, Sánchez-Hernández; Finstad, Anders Gravbrøt; Arnekleiv, Jo Vegar; Kjærstad, Gaute; Amundsen, Per-Arne (Journal article; Peer reviewed, 2018)
      We analysed data of a globally distributed model organism (brown trout) in an attempt to understand relationships among biogeography, prey communities and climate on diet composition at regional spatial scales (Scandinavia), ...
    • Ferskvandsfiskenes utbredelse og indvandring i Norge med et tillæg om krebsen – 100 år i 2018! 

      Sandlund, Odd Terje; Finstad, Anders Gravbrøt; Hesthagen, Trygve H. (Journal article; Peer reviewed, 2018)
      I 2018 er det 100 år siden et grunnleggende arbeid om innvandring og forekomst av ferskvannsfiskene våre ble utgitt. Hartvig Huitfeldt-Kaas la gjennom banebrytende forskning et solid grunnlag for mange av de temaene som ...
    • From greening to browning: Catchment vegetation development and reduced S-deposition promote organic carbon load on decadal time scales in Nordic lakes 

      Finstad, Anders Gravbrøt; Andersen, Tom; Larsen, Søren; Tominaga, Koji; Blumentrath, Stefan; de Wit, Heleen; Tømmervik, Hans; Hessen, Dag Olav (Journal article; Peer reviewed, 2016)
      Increased concentrations of dissolved organic carbon (DOC), often labelled “browning”, is a current trend in northern, particularly boreal, freshwaters. The browning has been attributed to the recent reduction in sulphate ...
    • Generic Ecological Impact Assessment of Alien Species (GEIAA): the third generation of assessments in Norway 

      Sandvik, Hanno; Hilmo, Olga; Finstad, Anders Gravbrøt; Hegre, Hanne; Moen, Toril Loennechen; Rafoss, Trond; Skarpaas, Olav; Elven, Reidar; Sandmark, Helge; Gederaas, Lisbeth (Journal article; Peer reviewed, 2019)
      The Generic Ecological Impact Assessment of Alien Species (GEIAA) is described. It comprises a set of criteria and an assessment procedure. The set of criteria consists of three criteria that quantify invasion potential, ...
    • Historical abundance and spatial distributions of spawners determine juvenile habitat accessibility in salmon: implications for population dynamics and management targets 

      Finstad, Anders Gravbrøt; Sættem, Leif Magnus; Einum, Sigurd (Journal article; Peer reviewed, 2013)
      Spatial distribution of spawning may have important ramifications for population dynamics in species where early life stages suffer from low mobility and high density-dependent mortality. Here, we use time series of spatial ...
    • Hydropower impacts on reservoir fish populations are modified by environmental variation 

      Eloranta, Antti; Finstad, Anders Gravbrøt; Helland, Ingeborg Palm; Ugedal, Ola; Power, Michael (Journal article; Peer reviewed, 2018)
      Global transition towards renewable energy production has increased the demand for newand more flexible hydropower operations. Beforemanagement and stakeholders can make informed choices on potential mitigations, it is ...
    • Integrating dispersal along freshwater ecosystems into species distribution models 

      Perrin, Sam Wenaas; Englund, Göran; Blumentrath, Stefan; O'Hara, Robert Brian; Amundsen, Per-Arne; Finstad, Anders Gravbrøt (Journal article; Peer reviewed, 2020)
      Aim: Our ability to model species distributions and abundances is a valuable ecological tool in predicting future distributions of species. Effectively incorporating connectivity into these predictions is crucial; however, ...
    • Interactions between local population density and limited habitat resources determine movements of juvenile Atlantic salmon 

      Teichert, Maxim; Foldvik, Anders; Einum, Sigurd; Finstad, Anders Gravbrøt; Forseth, Torbjørn; Ugedal, Ola (Journal article; Peer reviewed, 2017)
      Competition for limited resources and the resulting density-dependent processes are key factors in driving stream salmonid population dynamics. Here we test for the combined effects of density and shelter availability on ...
    • Introduced European smelt (Osmerus eperlanus) affects food web and fish community in a large Norwegian lake 

      Eloranta, Antti; Johnsen, Stein Ivar; Power, Michael; Bærum, Kim Magnus; Sandlund, Odd Terje; Finstad, Anders Gravbrøt; Rognerud, Sigurd; Museth, Jon (Journal article; Peer reviewed, 2018)
      Invasive and introduced fishes can affect recipient ecosystems and native species via altered competitive and predatory interactions, potentially leading to top-down and bottom-up cascading impacts. Here, we describe a ...
    • Lacustrine fish community turnover on a century time scale in south-eastern Norway 

      Poppe, Bastian (Master thesis, 2020)
      Menneskelig aktiviteter har bidratt til store endringer i økosystemer det siste århundret. Ferskvannsøkosystemer er spesielt sårbare mot antropogene aktiviteter som forårsaker endringer i biodiversitet. På grunn av ...
    • Metodikk for å fastsette miljømål for sterkt modifiserte vannforekomster. Auravassdraget som eksempel 

      Finstad, Anders Gravbrøt; Barton, David Nicholas; Jensen, Arne Johan; Johnsen, Bjørn Ove; Järnegren, Johanna; Sandlund, Odd Terje (NINA rapport;292, Research report, 2007)
      Bakgrunnen for dette prosjektet er et behov fra DN og NVE om å gi en naturvitenskapelig og samfunnsøkonomisk vurdering av miljømålfastsetting i sterkt modifiserte vannforekomster (SMVF). Miljømålet i SMVF er godt økologisk ...
    • Modelling climate change effects on Atlantic salmon: Implications for mitigation in regulated rivers 

      Sundt-Hansen, Line Elisabeth Breivik; Hedger, Richard David; Ugedal, Ola; Diserud, Ola Håvard; Finstad, Anders Gravbrøt; Sauterleute, Julian Friedrich; Tøfte, Lena S; Alfredsen, Knut; Forseth, Torbjørn (Journal article; Peer reviewed, 2018)
      Climate change is expected to alter future temperature and discharge regimes of rivers. These regimes have a strong influence on the life history of most aquatic river species, and are key variables controlling the growth ...
    • Nettverk for biologisk mangfold i ferskvann – samlerapport 2010. Atna- og Vikedalsvassdragene 

      Bongard, Terje; Brettum, Pål; Finstad, Anders Gravbrøt; Fjellheim, Arne; Halvorsen, Godtfred A.; Halvorsen, Gunnar; Hesthagen, Trygve H.; Hindar, Atle; Papinska, Katarzyna; Saksgård, Randi J.; Schneider, Susanne; Skancke, Liv Bente; Skjelbred, Birger; Walseng, Bjørn (NINA rapport;598, Research report, 2010)
      Denne rapporten oppsummerer resultatene fra overvåkingen av Atna- og Vikedalsvassdragene i programmet for overvåking av biologisk mangfold i ferskvann, fram til 2009. Kvalitetselementene som overvåkes er påvekstalger, ...