Blar i Brage IMR på forfatter "Frigstad, Helene"
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Mulighetskartlegging for kystbaserte næringer i Agder
Frigstad, Helene; Dahl, Einar; Moy, Frithjof Emil; Næs, Kristoffer; Knutsen, Jan Atle; Kaste, Øyvind (NIVA-rapport;, Research report, 2017)I Agder er det et sterkt ønske fra kystkommunene om å tilrettelegge for blå vekst i regionen, men for å realisere dette målet er det behov for faktisk kunnskap om hvilke muligheter havet gir – og utelukker – langs hele ... -
Nordic Blue Carbon Ecosystems: Status and Outlook
Krause-Jensen, Dorte; Gundersen, Hege; Björk, Mats; Gullström, Martin; Dahl, Martin; Asplund, Maria E.; Boström, Christoffer; Holmer, Marianne; Banta, Gary T.; Graversen, Anna Elizabeth Løvgren; Pedersen, Morten Foldager; Bekkby, Trine; Frigstad, Helene; Skjellum, Solrun Figenschau; Thormar, Jonas; Gyldenkærne, Steen; Howard, Jennifer; Pidgeon, Emily; Ragnarsdóttir, Sunna Björk; Mols-Mortensen, Agnes; Hancke, Kasper (Peer reviewed; Journal article, 2022)Vegetated coastal and marine habitats in the Nordic region include salt marshes, eelgrass meadows and, in particular, brown macroalgae (kelp forests and rockweed beds). Such habitats contribute to storage of organic carbon ... -
Pilotprosjekt - Kartlegging av marin natur i Møre og Romsdal. Årsrapport 2017
Bekkby, Trine; Sigurd, Espeland; Dolan, Margaret; Rinde, Eli; Moy, Frithjof Emil; Elvenes, Sigrid; Gundersen, Hege; van Son, Thijs Christiaan; Sogn Andersen, Guri; Thormar, Jonas; Frigstad, Helene; Moy, Siri Røang; Beylich, Bjørnar; Albretsen, Jon; Naustvoll, Lars Johan; Tveiten, Lise Ann (Research report, 2018) -
Potential effects of reduced riverine inorganic particle loading on water quality in the Oslofjord region
Wallhead, Philip; Kristiansen, Trond; Frigstad, Helene; Sørensen, Kai; Marty, Sabine (NIVA-rapport, Research report, 2021)A model investigation was carried out of the potential impacts of reduced riverine inorganic particle loading in the Oslofjord region. Some significant improvements in water clarity, particularly in the Glomma estuary, ... -
Seasonal variation in marine C:N:P stoichiometry: can the composition of seston explain stable Redfield ratios?
Frigstad, Helene; Andersen, Tom; Hessen, Dag Olav; Naustvoll, L..J.; Johnsen, Torbjørn Martin; Bellerby, Richard (Journal article; Peer reviewed, 2011)Seston is suspended particulate organic matter, comprising a mixture of autotrophic, heterotrophic and detrital material. Despite variable proportions of these components, marine seston often exhibits relatively small ... -
Synthesis of climate relevant results from selected monitoring programs in the coastal zone. Part 2: Quantitative analyses
Frigstad, Helene; Andersen, Guri Sogn; Trannum, Hilde Cecilie; Naustvoll, Lars Johan; Kaste, Øyvind; Hjermann, Dag Øystein (NIVA-rapport, Research report, 2018)This report is Part 2 of the project Synthesis of climate relevant results from selected monitoring programs in the coastal zone (Klima-Overblikk). The overall aim of this report was to document changes over the period ... -
Three decades of change in the Skagerrak coastal ecosystem, shaped by eutrophication and coastal darkening
Frigstad, Helene; Andersen, Guri Sogn; Trannum, Hilde Cecilie; Mcgovern, Maeve; Naustvoll, Lars Johan; Kaste, Øyvind; Deininger, Anne; Hjermann, Dag Øystein (Peer reviewed; Journal article, 2023)Global coastal ecosystems are under accelerating pressure from human activities and climate change. In this study we explore a long-term time series (mostly 1990–2016) from major Norwegian rivers, together with coastal ... -
Utredning av behovet for å redusere tilførslene av nitrogen til Ytre Oslofjord
Staalstrøm, Andre; Walday, Mats Gunnar; Vogelsang, Christian; Frigstad, Helene; Borgersen, Gunhild; Albretsen, Jon; Naustvoll, Lars Johan (NIVA-rapport, Research report, 2021)I store deler av Oslofjorden er det høye konsentrasjoner av nitrogen i vannmassene. I Frierfjorden, Tønsberg, Drammensfjorden, Mossesundet, Hvaler og Iddefjorden klassifiseres tilstanden til «moderat» eller dårlig for ...