Browsing Brage IMR by Author "Aarflot, Johanna Myrseth"
Now showing items 1-13 of 13
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A standard protocol for describing the evaluation of ecological models
Planque, Benjamin; Aarflot, Johanna Myrseth; Buttay, Lucie; Carroll, JoLynn; Fransner, Sara Filippa Krusmynta; Hansen, Cecilie; Husson, Berengere; Langangen, Øystein Ole Gahr; Lindstrøm, Ulf Ove; Pedersen, Torstein; Primicerio, Raul; Sivel, Elliot Manuarii; Skogen, Morten D.; Strombom, Evelyn; Stige, Leif Christian; Varpe, Øystein; Yoccoz, Nigel (Peer reviewed; Journal article, 2022)Numerical models o ecological systems are increasingly used to address complex environmental and resource management questions. One challenge or scientists, managers, and stakeholders is to appraise how well suited these ... -
Abundance and biomass of copepods and cladocerans in Atlantic and Arctic domains of the Barents Sea ecosystem
Skjoldal, Hein Rune; Aarflot, Johanna Myrseth (Peer reviewed; Journal article, 2023)Zooplankton in the Barents Sea have been monitored annually with a standard procedure with determination of size-fractioned biomass since the mid-1980s. Biomass of copepods and cladocerans was estimated based on measured ... -
Caught in broad daylight: Topographic constraints of zooplankton depth distributions
Aarflot, Johanna Myrseth; Aksnes, Dag Lorents; Opdal, Anders Frugård; Skjoldal, Hein Rune; Fiksen, Øyvind (Journal article; Peer reviewed, 2018)For visual predators, sufficient light is critical for prey detection and capture. Because light decays exponentially with depth in aquatic systems, vertical movement has become a widespread strategy among zooplankton for ... -
Contribution of Calanus to the mesozooplankton biomass in the Barents Sea
Aarflot, Johanna Myrseth; Skjoldal, Hein Rune; Dalpadado, Padmini; Skern-Mauritzen, Mette (Peer reviewed; Journal article, 2017) -
Ecosystem risk from human use of ocean space and resources: a case study from the Norwegian coast
Aarflot, Johanna Myrseth; Bjørdal, Vilde Regine; Dunlop, Katherine Mary; Espinasse, Marina; Husson, Berengere; Lindstrøm, Ulf Ove; Keulder-Stenevik, Felicia Juanita; Ono, Kotaro; Siwertsson, Anna; Skern-Mauritzen, Mette (Peer reviewed; Journal article, 2024)Coastal and adjacent shelf waters are generally highly productive ecosystems harboring important ecological processes and exposed to a range of anthropogenic pressures from land-based and marine sectors. Ensuring that the ... -
Foraging success in planktivorous fish increases with topographic blockage of prey distributions
Aarflot, Johanna Myrseth; Dalpadado, Padmini; Fiksen, Øyvind (Peer reviewed; Journal article, 2020)Banks and shelves are productive zones of the ocean, and often home to large fish stocks. Can shallower bottom topographies improve foraging opportunities for pelagic fish by blocking zooplankton from hiding in deep, darker ... -
New insights into the Barents Sea Calanus glacialis population dynamics and distribution
Aarflot, Johanna Myrseth; Eriksen, Elena; Prokopchuk, Irina P.; Svensen, Camilla; Søreide, Janne; Wold, Anette; Skogen, Morten D. (Peer reviewed; Journal article, 2023)Arctic copepods are major grazers and vital food for planktivores in polar ecosystems but challenging to observe due to remoteness and seasonal sea ice coverage. Models offer higher spatio-temporal resolution, and ... -
Pilotprosjekt for vurdering av samlet påvirkning i Oslofjorden – ytre del
Aarflot, Johanna Myrseth; Naustvoll, Lars Johan; Moy, Frithjof Emil; Norderhaug, Kjell Magnus; Berg, Florian; Kvamme, Cecilie; Søvik, Guldborg; Kleiven, Alf Ring; Albretsen, Jon; Freitas, Carla; Thorbjørnsen, Susanna Huneide; Falkenhaug, Tone (Rapport fra havforskningen;2024 - 15, Research report, 2024)Stor befolkningstetthet, høy menneskelig aktivitet og miljøutfordringer gjør at det er viktig å vurdere menneskelig påvirkning i Oslofjorden samlet. Denne rapporten presenterer en tverrsektoriell fremstilling av samlet ... -
Samlet påvirkning i foreslåtte særlig verdifulle og sårbare områder i norske havområder
Hansen, Cecilie; Aarflot, Johanna Myrseth; Eriksen, Elena; Husson, Berengere; Fauchald, Per; Johansen, Geir Odd; Jørgensen, Lis Lindal; van der Meeren, Gro Ingleid; Mikkelsen, Nina; Ottersen, Geir; von Quillfeldt, Cecilie; Skern-Mauritzen, Mette (Rapport fra havforskningen;2022 - 46, Research report, 2022)I dette arbeidet er det gjort en vurdering av risiko fra samlet påvirkning med tilhørende usikkerhet for aktive sektorer i norske havområder, for hvert av havområdene Nordsjøen, Norskehavet og Barentshavet, og for hvert ... -
Seasonal and interannual variability in abundance and population development of Calanus finmarchicus at the western entrance to the Barents Sea, 1995–2019
Skjoldal, Hein Rune; Aarflot, Johanna Myrseth; Bagøien, Espen; Skagseth, Øystein; Rønning, Jon S.; Lien, Vidar Suren (Peer reviewed; Journal article, 2021)Data on copepodid abundance and stage composition of Calanus finmarchicus was collected with seasonal resolution (5–6 times a year) from four stations along an oceanographic transect across the western Barents Sea Opening ... -
A standard protocol for describing the evaluation of ecological models
Planque, Benjamin; Aarflot, Johanna Myrseth; Buttay, Lucie; Carroll, JoLynn; Fransner, Sara Filippa Krusmynta; Hansen, Cecilie; Husson, Berengere; Langangen, Øystein Ole Gahr; Lindstrøm, Ulf Ove; Pedersen, Torstein; Primicerio, Raul; Sivel, Elliot Manuarii; Skogen, Morten D.; Strombom, Evelyn; Stige, Leif Christian; Varpe, Øystein; Yoccoz, Nigel (Peer reviewed; Journal article, 2022)Numerical models of ecological systems are increasingly used to address complex environmental and resource management questions. One challenge for scientists, managers, and stakeholders is to appraise how well suited these ... -
Transportation and predation control structures the distribution of a key calanoid in the Nordic Seas
Aarflot, Johanna Myrseth; Hjøllo, Solfrid Sætre; Strand, Espen; Skogen, Morten D. (Peer reviewed; Journal article, 2022)The largest Calanus species in the Nordic Seas is also the copepod for which we have the poorest knowledge. Recent studies have shown that C. hyperboreus is more likely of sub-Arctic rather than Arctic origins, and the ... -
Visual predation risk and spatial distributions of large Arctic copepods along gradients of sea ice and bottom depth
Langbehn, Tom; Aarflot, Johanna Myrseth; Freer, Jennifer J.; Varpe, Øystein (Peer reviewed; Journal article, 2023)Changes in the community size structure of Arctic copepods toward smaller and less fat individuals or species have been linked to environmental changes. The underpinning mechanisms are, however, poorly understood. We use ...