Browsing NIVA Open Access Archive by Author "Thaulow, Jens"
Now showing items 1-20 of 25
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A baseline study of the occurrence of non-indigenous species in Danish harbours
Andersen, Jesper Harbo; Kallenbach, Emilie; Kjeldgaard, Mathias Brink; Knudsen, Steen Wilhelm; Eikrem, Wenche; Fagerli, Camilla With; Oug, Eivind; Dale, Trine; Thaulow, Jens; Gitmark, Janne Kim; Hobæk, Anders; Green, Norman Whitaker; Hesselsøe, Martin; Støttrup, Josianne; Kuhn, Jesper; Bekkevold, Dorte; Jacobsen, Lars Magnus Wulf; Møller, Peter Rask; Olesen, Christian Aakjær; Carl, Henrik; Stuer-Lauridsen, Frank (NIVA-rapport;7769-2022, Research report, 2022)We report the first ever nation-wide study of the occurrence of non-indigenous species in Danish harbours. The sampling was car-ried out using both conventional and biomolecular methods (eDNA). In total, 16 harbours were ... -
Dancing around the pole: holarctic phylogeography of the Arctic fairy shrimp Branchinecta paludosa (Anostraca, Branchiopoda)
Lindholm, Markus; Angles d'Auriac, Marc; Thaulow, Jens; Hobæk, Anders (Journal article; Peer reviewed, 2016)The distributional patterns of Arctic species are commonly affected by the recurring Pleistocene glaciations, which contributed to transient or permanent genetic isolation. Here we explore the phylogeography of the ... -
Dead or alive — Old empty shells do not prompt false-positive results in environmental DNA surveys targeting the freshwater pearl mussel (Margaritifera margaritifera L.)
Rasmussen, Jes Jessen; Andersen, Liselotte Wesley; Johnsen, Trine Just; Thaulow, Jens; Anglès d'Auriac, Marc; Thomsen, Søren Nøhr; Hesselsøe, Martin (Peer reviewed; Journal article, 2021)Environmental DNA (eDNA) from water samples is increasingly used to detect the presence and distribution of species in aquatic ecosystems. However, before implementing eDNA in monitoring programmes, various species-specific ... -
Detection of an invasive aquatic plant in natural water bodies using environmental DNA
Anglès d'Auriac, Marc B.; Strand, David A.; Mjelde, Marit; Demars, Benoît O. L.; Thaulow, Jens (Journal article; Peer reviewed, 2019)The ability to detect founding populations of invasive species or rare species with low number of individuals is important for aquatic ecosystem management. Traditional approaches use historical data, knowledge of the ... -
Development of species-specific eDNA-based test systems for monitoring of non-indigenous species in Danish marine waters
Andersen, Jesper Harbo; Kallenbach, Emilie; Thaulow, Jens; Hesselsøe, Martin; Bekkevold, Dorte; Hansen, Brian Klitgaard; Jacobsen, Lars Magnus Wulf; Olesen, Christian Aakjaer; Møller, Peter Rask; Knudsen, Steen W. (NIVA-rapport;7204, Research report, 2018)The MONIS 3 project reports the development of 22 species-specific eDNA-based test systems for monitoring and mapping of the occurrence of non-indigenous species in Danish marine waters. The development has been undertaken ... -
Effects of water browning on freshwater biodiversity: the case of the predatory phantom midge Chaoborus nyblaei
Lindholm, Markus; Eie, Martin; Hessen, Dag Olav; Johansen, Joachim Tørum; Weiby, Kristoffer; Thaulow, Jens (Journal article; Peer reviewed, 2018)Water browning, due to increased runoff of terrestrial dissolved organic carbon (DOC), has recently gained considerable attention. While it is well settled how browning affects light regime and thereby aquatic primary ... -
Effekter av drikkevannsregulering på økologisk tilstand i Helgeren
Thrane, Jan-Erik; Lindholm, Markus; Mjelde, Marit; Demars, Benoît Olivier Laurent; Håll, Johnny Peter; Thaulow, Jens (NIVA-rapport;7392, Research report, 2019)I 2018 gjennomførte NIVA biologiske undersøkelser i Helgeren, et regulert drikkevannsmagasin som inngår i Oslos vannforsyning. Målet var å vurdere hvorvidt drikkevannsreguleringen går ut over den økologiske tilstanden i ... -
Epigenetic, transcriptional and phenotypic responses in Daphnia magna exposed to low-level ionizing radiation
Thaulow, Jens; Song, You; Lindeman, Leif C; Kamstra, Jorke H; YeonKyeong, Lee; Xie, Li; Aleström, Peter; Salbu, Brit; Tollefsen, Knut-Erik (Peer reviewed; Journal article, 2020)Ionizing radiation is known to induce oxidative stress and DNA damage as well as epigenetic effects in aquatic organisms. Epigenetic changes can be part of the adaptive responses to protect organisms from radiation-induced ... -
Epigenetic, transcriptional and phenotypic responses in two generations of Daphnia magna exposed to the DNA methylation inhibitor 5-Azacytidine
Lindeman, Leif Christopher; Thaulow, Jens; Song, You; Kamstra, Jorke H; Xie, Li; Asselman, Jana; Alestrøm, Peter; Tollefsen, Knut-Erik (Journal article; Peer reviewed, 2019)The water flea Daphnia magna is a keystone species in freshwater ecosystems and has been widely used as a model organism in environmental ecotoxicology. This aquatic crustacean is sensitive to environmental stressors and ... -
Forested Riparian Zones Provide Important Habitat for Fish in Urban Streams
Kupilas, Benjamin; Burdon, Francis J.; Thaulow, Jens; Håll, Johnny; Mutinova, Petra Thea; Forio, Marie Anne Eurie; Witing, Felix; Rîșnoveanu, Geta; Goethals, Peter; McKie, Brendan G.; Friberg, Nikolai (Peer reviewed; Journal article, 2021)Riparian zones form a boundary between aquatic and terrestrial ecosystems, with disproportionate influences on food web dynamics and ecosystem functioning in both habitats. However, riparian boundaries are frequently ... -
Genetic heterogeneity of two bioeconomically important kelp species along the Norwegian coast
Evankow, Ann; Christie, Hartvig C; Hancke, Kasper; Brysting, Anne Krag; Junge, Claudia; Fredriksen, Stein; Thaulow, Jens (Journal article; Peer reviewed, 2019)Knowledge of genetic diversity among wild populations is becoming increasingly important as more species are recognized for their bioeconomic value. Industrialization of natural resources, such as kelp in the marine shallow ... -
Integrative assessment of low-dose gamma radiation effects on Daphnia magna reproduction: Toxicity pathway assembly and AOP development
Song, You; Xie, Li; Lee, YeonKyeong; Brede, Dag Anders; Lyne, Fern; Kassaye, Yetneberk Ayalew; Thaulow, Jens; Caldwell, Gary S.; Salbu, Brit; Tollefsen, Knut-Erik (Peer reviewed; Journal article, 2020)High energy gamma radiation is potentially hazardous to organisms, including aquatic invertebrates. Although extensively studied in a number of invertebrate species, knowledge on effects induced by gamma radiation is to a ... -
Kartlegging av vasspest i Vannområde Leira-Nitelva 2018
Demars, Benoît Olivier Laurent; Angles d'Auriac, Marc; Thaulow, Jens; Brænden, Roar; Mjelde, Marit (NIVA-rapport;7303, Research report, 2018)Hensikten med oppdraget har vært å vurdere utbredelse og risiko for videre spredning av vasspest i Leira-vassdraget. I denne undersøkelsen har vi kombinert feltregistreringer med DNA (miljøDNA)-analyser. Til tross for at ... -
Korttidseffekter på vannkjemi, bunnfauna og fisk av spylevannsutslipp fra Glitretunnelen på nærliggende resipienter
Eriksen, Tor Erik; Thaulow, Jens; Lindholm, Markus; Berge, Dag (NIVA-rapport;6839, Research report, 2015)Denne rapporten omhandler korttidseffekter på vannkjemi, sedimentkjemi, bunnfauna og fisk ved spyling av Glitrevannverkets vannoverføringstunneler. Det ble i 2014 gjennomført to spylinger som medførte utslipp av spylevann ... -
Miljøundersøkelse i Aulivassdraget, konsekvenser av brannen ved Revac AS i 2014
Fjeld, Eirik; Allan, Ian; Bæk, Kine; Garmo, Øyvind Aaberg; Lund, Espen; Moe, Therese Fosholt; Persson, Jonas; Thaulow, Jens; Braaten, Hans Fredrik Veiteberg (NIVA-rapport;6757, Research report, 2014)En brann i et utendørs lager av plast iblandet fraksjoner av elektronikkavfall ved resirkuleringsanlegget til Revac AS i Vestfold 21. juli 2014 førte til utslipp av forurenset slukkevann i Aulivassdraget – med påfølgende ... -
Miljøundersøkelse i Aulivassdraget, oppfølging i 2015
Fjeld, Eirik; Allan, Ian; Persson, Jonas; Lund, Espen; Thaulow, Jens; Ranneklev, Sissel Brit (NIVA-rapport;6950, Research report, 2016)Det rapporteres her fra en oppfølgende miljøundersøkelse i Aulivassdraget, Tønsberg, etter brannen i utendørs lager av plast iblandet fraksjoner av EE-avfall, på gjenvinningsbedriften Revac AS på Linnestad industriområde ... -
Monitoring of environmental DNA from nonindigenous species of algae, dinoflagellates and animals in the North East Atlantic
Knudsen, Steen Wilhelm; Hesselsøe, Martin; Thaulow, Jens; Agersnap, Sune; Hansen, Brian Klitgaard; Jacobsen, Magnus Wulff; Bekkevold, Dorte; Jensen, Søren K.S.; Møller, Peter Rask; Andersen, Jesper H. (Peer reviewed; Journal article, 2022)Monitoring the distribution of marine nonindigenous species is a challenging task. To support this monitoring, we developed and validated the specificity of 12 primer-probe assays for detection of environmental DNA (eDNA) ... -
Parallelism in thermal growth response in otoliths and scales of brown trout (Salmo trutta L.) from alpine lakes independent of genetic background
Thaulow, Jens; Haugen, Thrond Oddvar; Borgstrøm, Reidar (Journal article; Peer reviewed, 2017)Low density in natural populations of salmonids has predominantly been managed by stocking of non‐native conspecifics. Due partly to domestication, introduced non‐native fish may be maladapted under natural conditions. ... -
Rapid expansion of the invasive oyster Crassostrea gigas at its northern distribution limit in Europe: Naturally dispersed or introduced?
Angles d'Auriac, Marc; Rinde, Eli; Norling, Pia Carina; Lapegue, Sylvie; Staalstrøm, Andre; Hjermann, Dag Øystein; Thaulow, Jens (Journal article; Peer reviewed, 2017)The Pacific oyster, Crassostrea gigas, was introduced to Europe for aquaculture purposes, and has had a rapid and unforeseen northward expansion in northern Europe. The recent dramatic increase in number of C. gigas ... -
Steps toward nation-wide monitoring of non-indigenous species in Danish marine waters under the Marine Strategy Framework Directive
Andersen, Jesper Harbo; Kallenbach, Emilie; Hesselsøe, Martin; Knudsen, Steen W.; Møller, Peter Rask; Bekkevold, Dorte; Hansen, Brian Klitgaard; Thaulow, Jens (NIVA-rapport;7022, Research report, 2016)This report is the outcome of MONIS 2 – or in full, “Monitoring of Non-Indigenous Species in Danish Marine Water, phase 2” – and includes three deliverable: (1) a national Target Species List including 50 species, (2) a ...