Blar i NIVA Open Access Archive på forfatter "Velle, Gaute"
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Acute effects of gas supersaturation on Atlantic salmon smolt in two Norwegian rivers
Stenberg, Sondre Kvalsvik; Velle, Gaute; Pulg, Ulrich; Skoglund, Helge (Peer reviewed; Journal article, 2020)Total dissolved gas (TDG) supersaturation downstream of hydropower plants may cause gas bubble disease (GBD) and harmful effects in fish. Little is known about tolerance levels of TDG supersaturation on Atlantic salmon ... -
Annual changes in aquatic plant photosynthesis in the regulated river Otra and the effect of plant removal
Demars, Benoît Olivier Laurent; Schneider, Susanne Claudia; Thiemer, Kirstine; Dörsch, Peter; Pulg, Ulrich; Stranzl, Sebastian Franz; Velle, Gaute; Pathak, Devanshi (NIVA-rapport;7858-2023, Research report, 2023)Mass development of submerged aquatic plants is often seen as nuisance for human activities. The present study used novel methods to estimate the changes in ecosystem photosynthesis (mostly Juncus bulbosus), through an ... -
Assessment of risk and risk-reducing measures related to the introduction and dispersal of the invasive alien carpet tunicate Didemnum vexillum in Norway
Järnegren, Johanna; Gulliksen, Bjørn; Husa, Vivian; Malmstrøm, Martin; Oug, Eivind; Berg, Paul Ragnar; Bryn, Anders; Geange, Sonya Rita; Hindar, Kjetil; Hole, Lars Robert; Kausrud, Kyrre Linné; Kirkendall, Lawrence Richard; Nielsen, Anders; Sandercock, Brett Kevin; Thorstad, Eva Bonsak; Velle, Gaute (Peer reviewed; Journal article, 2023)Didemnum vexillum is colonial sea squirt, a marine species which originates from the northwest Pacific; it was first recorded in Norway in November 2020. Didemnum vexillum is an alien species, meaning that it is a species ... -
Assessment of the risk to Norwegian biodiversity from private import and keeping of Northern Cardinal. Scientific Opinion of the Panel on Biodiversity of the Norwegian Scientific Committee for Food and Environment
Kirkendall, Lawrence Richard; Bryn, Anders; Flø, Daniel; Malmstrøm, Martin; Velle, Gaute; Berg, Paul Ragnar; Geange, Sonya Rita; Hindar, Kjetil; Kausrud, Kyrre Linné; Sandercock, Brett Kevin; Thorstad, Eva Bonsak; Nielsen, Anders (Peer reviewed; Journal article, 2023)VKM has evaluated the risk to biodiversity from allowing private import and keeping of the Northern Cardinal as a caged bird in Norway, for birds acquired through the bird trade. VKM has reviewed the invasion ecology of ... -
Assessment of the risks posed by domestic cats (Felis catus) to biodiversity and animal welfare in Norway
Nilsen, Erlend Birkeland; Braastad, Bjarne Olai; Dale, Svein; Dervo, Børre Kind; Kausrud, Kyrre Linné; Kirkendall, Lawrence Richard; Malmstrøm, Martin; Mejdell, Cecilie Marie; Rueness, Eli Knispel; Berg, Paul Ragnar; Bryn, Anders; Eldegard, Katrine; Geange, Sonya Rita; Hindar, Kjetil; Nielsen, Anders; Sandercock, Brett Kevin; Thorstad, Eva Bonsak; Velle, Gaute (Peer reviewed; Journal article, 2023)VKM has evaluated to what extent keeping of cats pose a risk to biodiversity in Norway. Risks were assessed separately for threats to biodiversity from direct predation, indirect (non-lethal) effects, competition with other ... -
Behavioural response of brown trout (Salmo trutta) to total dissolved gas supersaturation in a regulated river
Lennox, Robert J.; Thiemer, Kirstine; Vollset, Knut Wiik; Pulg, Ulrich; Stranzl, Sebastian; Nilsen, Cecilie Iden; Haugen, Thrond Oddvar; Velle, Gaute (Peer reviewed; Journal article, 2021)Total dissolved gas supersaturation from dams and power stations is a chronic freshwater pollutant that is toxic to animals with aquatic respiration. Laboratory ecotoxicology experiments have revealed capacity for captive ... -
Biodiversity in freshwaters: temporal trends and response to water chemistry (ICP Waters report 114/2013)
Velle, Gaute; Telford, Richard J.; Curtis, Chris; Eriksson, Lars; Fjellheim, Arne; Frolova, Marina; Fölster, Jens; Grudule, Natalja; Halvorsen, Godtfred A.; Hildrew, Alan; Hoffmann, Andreas; Indriksone, Iveta; Kamasová, Lenka; Kopáèek, Jiøí; Orton, Stuart; Krám, Pavel; Monteith, Don T.; Senoo, Takaaki; Shilland, Ewan M.; Stuchlík, Evžen; Wiklund, Magda-Lena; de Wit, Heleen; Skjelkvaale, Brit Lisa (NIVA-rapport;6580, Research report, 2013-10)This report describes trends in biological diversity of benthic invertebrates from acid-sensitive lakes and rivers sampled between 1982 and 2011 in the Czech Republic, Germany, Latvia, Norway, Sweden and the UK. The results ... -
Biodiversity of macro-invertebrates in acid-sensitive waters: trends and relations to water chemistry and climate. ICP Waters report 127/2016
Velle, Gaute; Mahlum, Shad; Monteith, Don T.; de Wit, Heleen; Arle, Jens; Eriksson, Lars; Fjellheim, Arne; Frolova, Marina; Fölster, Jens; Grudule, Natalja; Halvorsen, Godtfred A.; Hildrew, Alan; Hruška, Jakub; Indriksone, Iveta; Kamasová, Lenka; Kopáček, Jiří; Krám, Pavel; Orton, Stuart; Senoo, Takaaki; Shilland, Ewan M.; Stuchlík, Evžen; Telford, Richard J.; Ungermanová, Lenka; Wiklund, Magda-Lena; Wright, Richard F. (NIVA-rapport;7077, Research report, 2016-09)This is a study of the international impact of acid emission reductions on vulnerable freshwater biodiversity of benthic macroinvertebrates. In order to properly attribute impacts it is necessary to also incorporate the ... -
Biological intercalibration: Invertebrates 2018
Velle, Gaute; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7314, Research report, 2018)The 22nd biological intercalibration of invertebrates in the ICP Waters programme included four laboratories. The intercalibration is important for harmonising taxonomic work across countries, and is of high value in ... -
Biological intercalibration: Invertebrates 2019
Velle, Gaute; Birkeland, Ina Bakke; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7433, Research report, 2019)Two laboratories participated in the 23rd biological intercalibration of invertebrates in the ICP Waters programme. The intercalibration is important for harmonising taxonomic work across countries and is of high value ... -
Biological intercalibration: Invertebrates 2020
Velle, Gaute; Birkeland, Ina Bakke; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7556, Report, 2020)The 24th biological intercalibration of invertebrates in ICP Waters included three laboratories. The intercalibration is important for harmonizing taxonomic work across countries, to ensure high quality data in the ICP ... -
Biological intercalibration: Invertebrates 2021
Bodin, Christian Lucien; Velle, Gaute; Johannessen, Arne; Landås, Torunn Svanevik (NIVA-rapport;7685, Research report, 2021)The 25th biological intercalibration of invertebrates in ICP Waters included three participants. The intercalibration is important for harmonizing taxonomic work across countries, to ensure high quality data in the ICP ... -
Biological intercalibration: Invertebrates 2022
Bodin, Christian Lucien; Velle, Gaute; Landås, Torunn Svanevik; Kalvø, Daniel (NIVA-rapport;7840-2023, Research report, 2023)The ICP Waters biological intercalibration of invertebrates was executed to harmonise taxonomic work across countries and is of high value in programmes where the focus is on community analyses, e.g., for the classification ... -
Biological intercalibration: Invertebrates 2023
Bodin, Christian Lucien; Velle, Gaute; Landås, Torunn Svanevik (NIVA-rapport;7927-2024, Report, 2024)The ICP Waters biological intercalibration of invertebrates was executed to harmonise taxonomic work across countries and is of high value in programmes where the focus is on community analyses, e.g., for the classification ... -
Hydropower: gas supersaturation and the role of aquatic plant photosynthesis for fish health
Demars, Benoît Olivier Laurent; Dörsch, Peter; Thiemer, Kirstine; Clayer, Francois; Schneider, Susanne Claudia; Stranzl, Sebastian Franz; Pulg, Ulrich; Velle, Gaute (NIVA-rapport;7633, Research report, 2021)Fish and invertebrates breathing in water supersaturated with gas (total dissolved gas; TDG), e.g. at the outlet of hydropower plants, may develop gas bubble disease (analogous to the bends in humans). Aquatic plants also ... -
No additional stress of sublethal gas supersaturation in a landlocked population of Atlantic salmon (Salmo salar) exposed to environmental acidification
Höglund, Erik; Loland, Lifen Zhou; Høgberget, Rolf; Skov, Peter Vilhelm; Velle, Gaute (Peer reviewed; Journal article, 2024)The landlocked Atlantic salmon population “bleke” faces extinction due to environmental acidification (EA) and hydropower expansion in the Norwegian river Otra. Despite of restoration, unexpected mortality has been reported ... -
The recovery of European freshwater biodiversity has come to a halt
Haase, Peter; Bowler, Diana Elizabeth; Baker, Nathan J.; Bonada, Núria; Domisch, Sami; Marquez, Jaime R. Garcia Marquez; Heino, Jani; Hering, Daniel; Jähnig, Sonja C.; Schmidt-Kloiber, Astrid; Stubbington, Rachel; Altermatt, Florian; Álvarez-Cabria, Mario; Amatulli, Giuseppe; Angeler, David G.; Archambaud-Suard, Gaït; Jorrín, Iñaki Arrate; Aspin, Thomas; Azpiroz, Iker; Bañares, Iñaki; Ortiz, José Barquín; Bodin, Christian L.; Bonacina, Luca; Bottarin, Roberta; Cañedo-Argüelles, Miguel; Csabai, Zoltán; Datry, Thibault; De Eyto, Elvira; Dohet, Alain; Dörflinger, Gerald; Drohan, Emma; Eikland, Knut Andreas; England, Judy; Eriksen, Tor E.; Evtimova, Vesela; Feio, Maria J.; Ferréol, Martial; Floury, Mathieu; Forcellini, Maxence; Forio, Marie Anne Eurie; Fornaroli, Riccardo; Friberg, Nikolai; Fruget, Jean-François; Georgieva, Galia; Goethals, Peter; Graça, Manuel A. S.; Graf, Wolfram; House, Andy; Huttunen, Kaisa-Leena; Jensen, Thomas Correll; Pilotto, Francesca; Rasmussen, Jes Jessen; Sandin, Leonard; Velle, Gaute (Peer reviewed; Journal article, 2023)Owing to a long history of anthropogenic pressures, freshwater ecosystems are among the most vulnerable to biodiversity loss1. Mitigation measures, including wastewater treatment and hydromorphological restoration, have ... -
Responses of benthic invertebrates to chemical recovery from acidification
Velle, Gaute; Bodin, Christian Lucien; Arle, Jens; Austnes, Kari; Boggero, Angela; Bojkova, Jindriska; Fornaroli, Riccardo; Fölster, Jens; Goedkoop, Willem; Jones, Iwan; Juggins, Steve; Lau, Danny C.P.; Monteith, Don; Murphy, John; Musazzi, Simona; Shilland, Ewan; Steingruber, Sandra; Wiklund, Magda-Lena; de Wit, Heleen (NIVA-rapport;7881-2023, Research report, 2023)The report provides an assessment of biological recovery from acidification in freshwater environments in Europe. The report consists of two parts, a regional data analysis based on an international dataset of biological ...