Browsing NTNU Open by Author "Fragoso, Glaucia Moreira"

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    • A global compilation of coccolithophore calcification rates 

      Daniels, Chris J.; Poulton, Alex J.; Balch, William M; Marañon, Emilio; Adey, Tim; Bowler, Bruce C; Cermeno, Pedro; Charalampopoulou, Anastasia; Crawford, David W.; Drapeau, Dave; Feng, Yuanyuan; Fernandez, Ana; Fernandez, Emilio; Fragoso, Glaucia Moreira; Gonzalez, Natalia; Graziano, Lisa M; Heslop, Rachel; Holligan, Patrick M; Hopkins, Jason; Huete-Ortega, Maria; Hutchins, David A.; Lam, Phoebe J.; Lipsen, Michael S; Lopez-Sandoval, Daffne C; Loucaides, Socratis; Marchetti, Adrian; Mayers, Kyle; Rees, Andrew P; Sobrino, Cristina; Tynan, Eithne; Tyrrell, Toby (Journal article; Peer reviewed, 2018)
      The biological production of calcium carbonate (CaCO3), a process termed calcification, is a key term in the marine carbon cycle. A major planktonic group responsible for such pelagic CaCO3 production (CP) is the ...

    • Campaign For Hyperspectral Data Validation In North Atlantic Coastal Waters 

      Oudijk, Esmée; Hasler, Oliver Kevin; Overaas, H; Marty, Sabine; Williamson, David; Svendsen, T; Berg, Simen; Birkeland, Roger; Halvorsen, D; Bakken, S; Henriksen, Marie Bøe; Alver, Morten; Johnsen, Geir; Johansen, Tor Arne; Stahl, Annette; Kvaløy, Pål; Dallolio, Alberto; Majaneva, Sanna; Fragoso, Glaucia Moreira; Garrett, Joseph (Peer reviewed; Journal article, 2022)
      The high photosynthetic productivity of the Mausund bank on the coast of mid-Norway has given the area important economic and ecologic value. Monitoring chlorophyll-a (chl-a) production can assist in managing the local ...

    • Contrasting phytoplankton-zooplankton distributions observed through autonomous platforms, in-situ optical sensors and discrete sampling 

      Fragoso, Glaucia Moreira; Davies, Emlyn John; Fossum, Trygve Olav; Ullgren, Jenny; Majaneva, Sanna; Aberle-Malzahn, Nicole; Ludvigsen, Martin; Johnsen, Geir (Peer reviewed; Journal article, 2022)
      Plankton distributions are remarkably ‘patchy’ in the ocean. In this study, we investigated the contrasting phytoplankton-zooplankton distributions in relation to wind mixing events in waters around a biodiversity-rich ...

    • Diatom biogeography from the Labrador Sea revealed through a trait-based approach 

      Fragoso, Glaucia Moreira; Poulton, Alex J.; Yashayaev, Igor M.; Head, Erica J.H.; Johnsen, Geir; Purdie, Duncan A. (Journal article; Peer reviewed, 2018)
      Diatoms are a keystone algal group, with diverse cell morphology and a global distribution. The biogeography of morphological, functional, and life-history traits of marine diatoms were investigated in Arctic and Atlantic ...

    • In situ biomass estimation of cultivated kelp using RGB imagery 

      Overrein, Martin Molberg (Master thesis, 2023)
      Global produksjon i makroalgeoppdrett utgjør over en fjerdedel av total oppdrettsproduksjon, med et produksjonsvolum på opptil 35.1 millioner tonn i 2020. I Norge er det stadig økt innsats for å utvikle makroalgeoppdrett ...

    • Information-driven robotic sampling in the coastal ocean 

      Fossum, Trygve Olav; Eidsvik, Jo; Ellingsen, Ingrid H.; Alver, Morten; Fragoso, Glaucia Moreira; Johnsen, Geir; mendes, renato; Ludvigsen, Martin; Rajan, Kanna (Journal article; Peer reviewed, 2018)
      Efficient sampling of coastal ocean processes, especially mechanisms such as upwelling and internal waves and their influence on primary production, is critical for understanding our changing oceans. Coupling robotic ...

    • Physical controls on phytoplankton size structure, photophysiology and suspended particles in a Norwegian biological hotspot 

      Fragoso, Glaucia Moreira; Davies, Emlyn John; Ellingsen, Ingrid H.; Chauton, Matilde Skogen; Fossum, Trygve Olav; Ludvigsen, Martin; Steinhovden, Kristine; Rajan, Kanna; Johnsen, Geir (Peer reviewed; Journal article, 2019)
      The impact of the physical environment and phytoplankton size on particle types (zooplankton, biogenic matter or phytodetritus) in the water column is poorly understood. Here, we investigate how hydrography (e.g. water ...

    • Phytoplankton community succession and dynamics using optical approaches 

      Fragoso, Glaucia Moreira; Johnsen, Geir; Chauton, Matilde Skogen; Cottier, Finlo Robert; Ellingsen, Ingrid H. (Peer reviewed; Journal article, 2020)
      The phytoplankton in coastal regions are responding to constant environmental changes, thus the use of proxies derived from in situ frequent time-series observations and validated from traditional microscopic or pigment ...

    • Toward adaptive robotic sampling of phytoplankton in the coastal ocean 

      Fossum, Trygve Olav; Fragoso, Glaucia Moreira; Davies, Emlyn John; Ullgren, Jenny; Mendes, Renato; Johnsen, Geir; Ellingsen, Ingrid H.; Eidsvik, Jo; Ludvigsen, Martin; Rajan, Kanna (Journal article; Peer reviewed, 2019)
      Currents, wind, bathymetry, and freshwater runoff are some of the factors that make coastal waters heterogeneous, patchy, and scientifically interesting—where it is challenging to resolve the spatiotemporal variation within ...

    • Underwater Hyperspectral Imaging of Arctic Macroalgal Habitats during the Polar Night Using a Novel Mini-ROV-UHI Portable System 

      Summers, Natalie; Johnsen, Geir; Mogstad, Aksel Alstad; Løvås, Håvard; Fragoso, Glaucia Moreira; Berge, Jørgen (Peer reviewed; Journal article, 2022)
      We describe an Underwater Hyperspectral Imager (UHI) deployed on an instrument-carrying platform consisting of two interconnected mini-ROVs (Remotely Operated Vehicle) for the mapping and monitoring of Arctic macroalgal ...