Blar i NTNU Open på forfatter "Bårdsen, Bård-Jørgen"
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Climate change and the increasing impact of polar bears on bird populations
Prop, Jouke; Aars, Jon; Bårdsen, Bård-Jørgen; Hanssen, Sveinn Are; Bech, Claus; Bourgeon, Sophie; Fouw, Jimmy de; Gabrielsen, Geir W.; Lang, Johannes; Noreen, Elin; Oudman, Thomas; Sittler, Benoit; stempniewicz, Lech; Tombre, Ingunn; Wolters, Eva; Moe, Børge (Journal article; Peer reviewed, 2015-03-25)The Arctic is becoming warmer at a high rate, and contractions in the extent of sea ice are currently changing the habitats of marine top-predators dependent on ice. Polar bears (Ursus maritimus) depend on sea ice for ... -
Effects of climate change and diminishing sea ice on Common Eider breeding distribution in Kongsfjorden, Svalbard
Dørum, Hilde (Master thesis, 2019)Jordas polare strøk varmes opp dobbelt så raskt som resten av kloden, og en av de største truslene knyttet til global oppvarming er nedsmelting av isen i polområdene. Verdens sjøfuglbestander synker i antall, og et stort ... -
Hunting for ecological indicators: are large herbivore skeleton measures from harvest data useful proxies for monitoring?
Pedersen, Åshild Ønvik; Bårdsen, Bård-Jørgen; Veiberg, Vebjørn; Irvine, Justin R; Hansen, Brage Bremset (Peer reviewed; Journal article, 2023)Hunter-collected data and samples are used as indices of population performance, and monitoring programs often take advantage of such data as ecological indicators. Here, we establish the relationships between measures of ... -
Impacts of a warming climate on concentrations of organochlorines in a fasting high arctic marine bird: Direct vs. indirect effects?
Bustnes, Jan Ove; Bårdsen, Bård-Jørgen; Moe, Børge; Herzke, Dorte; Ballesteros, Manuel; Fenstad, Anette; Borgå, Katrine; Krogseth, Ingjerd Sunde; Eulaers, Igor; Skogeng, Lovise Pedersen; Gabrielsen, Geir Wing; Hanssen, Sveinn Are (Peer reviewed; Journal article, 2024)The present study examined how climate changes may impact the concentrations of lipophilic organochlorines (OCs) in the blood of fasting High Arctic common eiders (Somateria mollissima) during incubation. Polychlorinated ... -
Isbjørnens effekt på fugl i et arktisk klima i endring - Sluttrapport for Svalbards miljøvernfond
Moe, Børge; Prop, Jouke; Aars, Jon; Bårdsen, Bård-Jørgen; Hanssen, Sveinn Are; Bech, Claus; Bourgeon, Sophie; Fouw, Jimmy de; Gabrielsen, Geir Wing; Lang, Johannes; Noreen, Elin; Oudman, Thomas; Sittler, Benoit; Stempniewicz, Lech; Tombre, Ingunn; Wolters, Eva (NINA Rapport;1163, Research report, 2015)Arktis blir stadig varmere og utbredelsen av havis blir mindre. Det forandrer leveområdet til de mange artene som er avhengige av havis. Isbjørnen er avhengig av havis for å jakte på sel, og økende lengde på den isfrie ... -
Temporal trends of legacy organochlorines in different white-tailed eagle (Haliaeetus albicilla) subpopulations: A retrospective investigation using archived feathers
Sun, Jiachen; Covaci, Adrian; Bustnes, Jan Ove; Jaspers, Veerle; Helander, Björn; Bårdsen, Bård-Jørgen; Boertmann, David; Dietz, Rune; Labansen, Aili Lage; Lepoint, Gilles; Schulz, Ralf; Malarvannan, Govindan; Sonne, Christian; Thorup, Kasper; Tøttrup, Anders P.; Zubrod, Jochen P.; Eens, Marcel; Eulaers, Igor (Peer reviewed; Journal article, 2020)Understanding the spatiotemporal patterns of legacy organochlorines (OCs) is often difficult because monitoring practices differ among studies, fragmented study periods, and unaccounted confounding by ecological variables. ... -
Temporal variation in circulating concentrations of organochlorine pollutants in a pelagic seabird breeding in the high arctic
Bustnes, Jan Ove; Bårdsen, Bård-Jørgen; Moe, Børge; Herzke, Dorte; Hanssen, Sveinn Are; Sagerup, Kjetil; Bech, Claus; Nordstad, Tore; Chastel, Olivier; Tartu, Sabrina; Gabrielsen, Geir W. (Journal article; Peer reviewed, 2017)The present study explored short-term temporal variations in circulating concentrations of 3 legacy organochlorines with different physicochemical properties (polychlorinated biphenyl 153 [PCB-153], p,p0-dichlorodiphenyl ...