• Centennial relationships between ocean temperature and Atlantic puffin production reveal shifting decennial trends 

      Hansen, Erpur S.; Sandvik, Hanno; Erikstad, Kjell E.; Yoccoz, Nigel; Anker-Nilssen, Tycho; Bader, Jürgen; Descamps, Sebastien; Hodges, Kevin; Mesquita, Michel d. S.; Reiertsen, Tone Kristin; Varpe, Øystein (Peer reviewed; Journal article, 2021)
      The current warming of the oceans has been shown to have detrimental effects for a number of species. An understanding of the underlying mechanisms may be hampered by the non-linearity and non-stationarity of the relationships ...
    • Climate fluctuations and differential survival of bridled and non-bridled Common Guillemots Uria aalge 

      Reiertsen, Tone Kristin; Erikstad, Kjell E; Barrett, Robert T; Sandvik, Hanno; Yoccoz, Nigel (Journal article; Peer reviewed, 2012)
      Climate fluctuations and its effects on ecological processes are evident in most areas worldwide but whether such climatic effects are induced phenotypic plasticity or whether animals adapt to the new environment through ...
    • Consequences of cross-season demographic correlations for population viability 

      Layton-Matthews, Kate; Reiertsen, Tone Kristin; Erikstad, Kjell E.; Anker-Nilssen, Tycho; Daunt, Francis; Wanless, Sarah; Barrett, Robert; Newell, Mark A; Harris, Mike P. (Peer reviewed; Journal article, 2023)
      Demographic correlations are pervasive in wildlife populations and can represent important secondary drivers of population growth. Empirical evidence suggests that correlations are in general positive for long-lived species, ...
    • Earlier colony arrival but no trend in hatching timing in two congeneric seabirds (Uria spp.) across the North Atlantic 

      Merkel, Benjamin; Descamps, Sebastien; Yoccoz, Nigel Gilles; Danielsen, Jóhannis; Daunt, Francis; Erikstad, Kjell E; Ezhov, Aleksey V.; Grémillet, David; Gavrilo, Maria; Lorentsen, Svein Håkon; Reiertsen, Tone Kristin; Steen, Harald; Systad, Geir Helge Rødli; Þórarinsson, Þorkell Lindberg; Wanless, Sarah; Strøm, Hallvard (Peer reviewed; Journal article, 2019)
      A global analysis recently showed that seabird breeding phenology (as the timing of egg-laying and hatching) does not, on average, respond to temperature changes or advance with time (Keogan et al. 2018 Nat. Clim. Change ...
    • Inter-population synchrony in adult survival and effects of climate and extreme weather in non-breeding areas of Atlantic puffins 

      Reiertsen, Tone Kristin; Layton-Matthews, Kate; Erikstad, K.E.; Hodges, Kevin I.; Ballesteros, Manuel; Anker-Nilssen, Tycho; Barrett, R.T.; Benjaminsen, Sigurd; Bogdanova, M.; Christensen-Dalsgaard, Signe; Daunt, Francis; Dehnhard, Nina; Harris, Michael P.; Langset, Magdalene; Lorentsen, Svein-Håkon; Newell, Mark; Bråthen, Vegard Sandøy; Støyle-Bringsvor, I.; Systad, Geir Helge Rødli; Wanless, Sarah (Peer reviewed; Journal article, 2021)
      Seabirds are undergoing drastic declines globally and spend the non-breeding season at sea, making it challenging to study the drivers of their survival. Harsh weather and changes in climate conditions can have large impacts ...
    • Later at higher latitudes: large-scale variability in seabird breeding timing and synchronicity 

      Burr, Zofia M.; Varpe, Øystein; Anker-Nilssen, Tycho; Erikstad, Kjell E; Descamps, Sébastien; Barrett, Robert T; Bech, Claus; Christensen-Dalsgaard, Signe; Lorentsen, Svein-Håkon; Moe, Børge; Reiertsen, Tone Kristin; Strøm, Hallvard (Journal article; Peer reviewed, 2016-05-28)
      In seasonal environments, organisms are expected to optimally schedule reproduction within an annual range of environmental conditions. Latitudinal gradients generate a range of seasonality to which we can expect adaptations ...
    • North Atlantic winter cyclones starve seabirds 

      Clairbaux, Manon; Mathewson, Paul; Porter, Warren; Fort, Jérôme; Strøm, Hallvard; Moe, Børge; Fauchald, Per; Descamps, Sebastien; Helgason, Halfdan Helgi; Bråthen, Vegard Sandøy; Merkel, Benjamin; Anker-Nilssen, Tycho; Bringsvor, Ingar Støyle; Chastel, Olivier; Christensen-Dalsgaard, Signe; Danielsen, Jóhannis; Daunt, Francis; Dehnhard, Nina; Erikstad, Kjell E.; Ezhov, Alexey V.; Gavrilo, Maria; Krasnov, Yuri V.; Langset, Magdalene; Lorentsen, Svein-Håkon; Newell, Mark; Olsen, Bergur; Reiertsen, Tone Kristin; Systad, Geir Helge Rødli; Thórarinsson, Thorkell L; Baran, Mark; Diamond, Tony; Fayet, Annette L.; Fitzsimmons, Michelle G.; Frederiksen, Morten; Gilchrist, Hugh G.; Guilford, Tim; Huffeldt, Nicholas P.; Jessopp, Mark; Johansen, Kasper L.; Kouwenberg, Amy-Lee; Linnebjerg, Jannie F.; Major, Heather L.; Tranquilla, Laura McFarlane; Mallory, Mark; Merkel, Flemming R.; Montevecchi, William A.; Mosbech, Anders; Petersen, Aevar; Grémillet, David (Peer reviewed; Journal article, 2021)
      Each winter, the North Atlantic Ocean is the stage for numerous cyclones, the most severe ones leading to seabird mass-mortality events called ‘‘winter wrecks.’’ During these, thousands of emaciated seabird carcasses are ...
    • Raising offspring increases ageing: Differences in senescence among three populations of a long-lived seabird, the Atlantic puffin 

      Landsem, Terje Lorentzen; Yoccoz, Nigel Gilles; Layton-Matthews, Kate; Hilde, Christoffer Høyvik; Harris, Michael P; Wanless, Sarah; Daunt, Francis; Reiertsen, Tone Kristin; Erikstad, Kjell E.; Anker-Nilssen, Tycho (Peer reviewed; Journal article, 2023)
      1. Actuarial senescence, the decline of survival with age, is well documented in the wild. Rates of senescence vary widely between taxa, to some extent also between sexes, with the fastest life histories showing the highest ...
    • The relationship between daily behavior, hormones, and a color dimorphism in a seabird under natural continuous light 

      Huffeldt, Nicholas Per; Tigano, Anna; Erikstad, Kjell E; Goymann, Wolfgang; Jenni-Eiermann, Susanne; Moum, Truls Borg; Reiertsen, Tone Kristin (Journal article; Peer reviewed, 2021)
      The predictable oscillation between the light of day and the dark of night across the diel cycle is a powerful selective force that has resulted in anticipatory mechanisms in nearly all taxa. At polar latitude, however, ...
    • A risk assessment of the effects of mercury on Baltic Sea, Greater North Sea and North Atlantic wildlife, fish and bivalves 

      Dietz, Rune; Fort, Jérôme; Sonne, Christian; Albert, Céline; Bustnes, Jan Ove; Christensen, Thomas Kjær; Ciesielski, Tomasz Maciej; Danielsen, Jóhannis; Dastnai, Sam; Eens, Marcel; Erikstad, Kjell E; Galatius, Anders; Garbus, Svend-Erik; Gilg, Oliver; Hanssen, Sveinn Are; Helander, Björn; Helberg, Morten; Jaspers, Veerle; Jenssen, Bjørn Munro; Jónsson, Jón Einar; Kauhala, Kaarina; Kolbeinsson, Yann; Kyhn, Line A.; Labansen, Aili Lage; Larsen, Martin M.; Lindstrøm, Ulf; Reiertsen, Tone Kristin; Rigét, Frank F.; Roos, Anna; Strand, Jakob; Strøm, Hallvard; Søndergaard, Jens; Sun, Jiachen; Teilmann, Jonas; Therkildsen, Ole Roland; Thórarinsson, Thorkell Lindberg; Tjørnløv, Rune Skjold; Wilson, Simon; Eulaers, Igor (Peer reviewed; Journal article, 2020)
      A wide range of species, including marine mammals, seabirds, birds of prey, fish and bivalves, were investigated for potential population health risks resulting from contemporary (post 2000) mercury (Hg) exposure, using ...
    • Strong migratory connectivity across meta-populations of sympatric North Atlantic seabirds 

      Merkel, Benjamin; Descamps, Sebastien; Yoccoz, Nigel; Grémillet, David; Fauchald, Per; Danielsen, Jóhannis; Daunt, Francis; Erikstad, Kjell E.; Ezhov, Aleksey V.; Harris, Mike P.; Gavrilo, Maria; Lorentsen, Svein-Håkon; Reiertsen, Tone Kristin; Systad, Geir Helge Rødli; Thórarinsson, Thorkell Lindberg; Wanless, Sarah; Strøm, Hallvard (Peer reviewed; Journal article, 2021)
      Identifying drivers of population trends in migratory species is difficult, as they can face many stressors while moving through different areas and environments during the annual cycle. To understand the potential of ...
    • Temperature synchronizes temporal variation in laying dates across European hole-nesting passerines 

      Vriend, Stefan J.G.; Grøtan, Vidar; Gamelon, Marlène; Adriaensen, Frank; Ahola, Markus P.; Álvarez, Elena; Bailey, Liam D.; Barba, Emilio; Bouvier, Jean-Charles; Burgess, Malcolm D.; Bushuev, Andrey; Camacho, Carlos; Canal, David; Charmantier, Anne; Cole, Ella F.; Cusimano, Camillo; Doligez, Blandine F.; Drobniak, Szymon M.; Dubiec, Anna; Eens, Marcel; Eeva, Tapio; Erikstad, Kjell E.; Ferns, Peter N.; Goodenough, Anne E.; Hartley, Ian R.; Hinsley, Shelley A.; Ivankina, Elena; Juškaitis, Rimvydas; Kempenaers, Bart; Kerimov, Anvar B.; Kålås, John Atle; Lavigne, Claire; Leivits, Agu; Mainwaring, Mark C.; Martínez-Padilla, Jesús; Matthysen, Erik; van Oers, Kees; Orell, Markku; Pinxten, Rianne; Reiertsen, Tone Kristin; Rytkönen, Seppo; Senar, Juan Carlos; Sheldon, Ben C.; Sorace, Alberto; Török, János; Vatka, Emma; Visser, Marcel E.; Sæther, Bernt-Erik (Peer reviewed; Journal article, 2022)
      Identifying the environmental drivers of variation in fitness-related traits is a central objective in ecology and evolutionary biology. Temporal fluctuations of these environmental drivers are often synchronized at large ...
    • Twilight foraging enables European shags to survive the winter across their latitudinal range 

      Moe, Børge; Daunt, Francis; Bråthen, Vegard Sandøy; Barrett, Robert; Ballesteros, Manuel; Bjørnstad, Oskar; Bogdanova, Maria I.; Dehnhard, Nina; Erikstad, Kjell E.; Follestad, Arne; Gíslason, Sindri; Hallgrimsson, Gunnar Thor; Lorentsen, Svein-Håkon; Newell, Mark; Petersen, Aevar; Phillips, Richard A.; Ragnarsdóttir, Sunna Björk; Reiertsen, Tone Kristin; Åström, Jens; Wanless, Sarah; Anker-Nilssen, Tycho (Peer reviewed; Journal article, 2021)
      Species breeding at high latitudes face a significant challenge of surviving the winter. Such conditions are particularly severe for diurnal marine endotherms such as seabirds. A critical question is therefore what behavioural ...
    • Variation and correlation in the timing of breeding of North Atlantic seabirds across multiple scales 

      Keogan, Katharine; Daunt, Francis; Wanless, Sarah; Phillips, Richard A.; Alvarez, David; Anker-Nilssen, Tycho; Barrett, Robert; Bech, Claus; Becker, Peter H.; Berglund, Per-Arvid; Bouwhuis, Sandra; Burr, Zofia M.; Chastel, Olivier; Christensen-Dalsgaard, S*; Christensen-Dalsgaard, Signe; Descamps, Sebastien; Diamond, Tony; Elliott, Kyle; Erikstad, Kjell E.; Harris, Mike; Hentati-Sundberg, Jonas; Heubeck, Martin; Kress, Stephen W.; Langset, Magdalene; Lorentsen, Svein-Håkon; Major, Heather L.; Mallory, Mark; Mellor, Mick; Miles, Will T.S.; Moe, Børge; Mostello, Carolyn; Newell, Mark; Nisbet, Ian; Reiertsen, Tone Kristin; Rock, Jennifer; Shannon, Paula; Varpe, Øystein; Lewis, Sue; Phillimore, Albert B. (Peer reviewed; Journal article, 2022)
      1. Timing of breeding, an important driver of fitness in many populations, is widely studied in the context of global change, yet despite considerable efforts to identify environmental drivers of seabird nesting phenology, ...
    • When things go wrong: intra-season dynamics of breeding failure in a seabird 

      Ponchon, Aurore; Grémillet, David J.H.; Christensen-Dalsgaard, Signe; Erikstad, Kjell E; Barrett, Robert T.; Reiertsen, Tone Kristin; McCoy, Karen D.; Tveraa, Torkild; Boulinier, Thierry (Journal article; Peer reviewed, 2014)
      During breeding, long-lived species face important time and energy constraints that can lead to breeding failure when food becomes scarce. Despite the potential implications of intra-season dynamics in breeding failure for ...