Blar i NTNU Open på forfatter "Majaneva, Sanna"
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Assessing the Value of a Citizen Science Approach for Ctenophore Identification
Johansen, Ellie; Aberle-Malzahn, Nicole; Østensen, Mari-Ann; Majaneva, Sanna (Journal article; Peer reviewed, 2021)During the era of biodiversity loss, a complete species census and understanding where the different species occur is of high priority. Even though this knowledge has increased tremendously, mainly with expanded use of ... -
Assessment of key microzooplankton species from Trondheimsfjorden using morphological and molecular methods
Wallin, Jan Konrad (Master thesis, 2019)Mikrozooplankton (MZP) er heterotrofiske og mixotrofe organismer i størrelsesområdet 20 - 200 µm. Disse organismene er vanskelige å artsbestemme med molekylære identifikasjonsmetoder. Det er mangelfullt med referansedata ... -
Blinks in the dark - Detecting and characterizing flash kinetics of bioluminescence for in situ species recognition of zooplankton
Krohn-Pettersen, Gitte (Master thesis, 2023)Med biodiversitetkrisen jorden står overfor, hvor presset på biologisk mangfold øker og effekter av menneskelige handlinger på de naturlige økosystemene vokser, er det et presserende behov for overvåkningsprogrammer og ... -
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 ... -
Deficiency syndromes in top predators associated with large-scale changes in the Baltic Sea ecosystem
Majaneva, Sanna; Fridolfsson, Emil; Casini, Michele; Legrand, Catherine; Lindehoff, Elin; Margonski, Piotr; Majaneva, Markus; Nilsson, Jonas; Rubene, Gunta; Wasmund, Norbert; Hylander, Samuel (Peer reviewed; Journal article, 2020)Vitamin B1 (thiamin) deficiency is an issue periodically affecting a wide range of taxa worldwide. In aquatic pelagic systems, thiamin is mainly produced by bacteria and phytoplankton and is transferred to fish and birds ... -
Distribution, interspecific variation and habitats of scyphozoan polyp colonies in Trondheimsfjorden
Rekstad, Matias Einer (Master thesis, 2019)Manetoppblomstringer er fremdeles et emne med høy økonomisk og økologisk betydning. Det er også en pågående debatt om hvorvidt frekvensen og intensiteten av maneoppblomstringer øker eller ikke. Kombinert med tvetydige data ... -
Environmental niche overlap in sibling planktonic species Calanus finmarchicus and C. glacialis in Arctic fjords
Weydmann-Zwolicka, Agata; Cottier, Finlo Robert; Berge, Jørgen; Majaneva, Sanna; Kuklinski, Piotr; Zwolicki, Adrian (Peer reviewed; Journal article, 2022)Knowledge of environmental preferences of the key planktonic species, such as Calanus copepods in the Arctic, is crucial to understand ecosystem function and its future under climate change. Here, we assessed the environmental ... -
Glow and know – Evaluating the Potential of Spectral Bioluminescence as a Tool for Zooplankton Identification in situ
Førde, Hedda (Master thesis, 2024)Mange arter forsvinner i det stille, men dette er i ferd med å bli en av de største truslene vi står overfor i dag. For å begrense tapet av biologisk mangfold er det viktig å overvåke og forstå artene som lever i de ulike ... -
Hiding in plain sight - Euplokamis dunlapae (Ctenophora) in Norwegian waters
Majaneva, Sanna; Ringvold, Halldis; Johansen, Ellie; Østensen, Mari-Ann; Hosia, Aino Laila Johanna (Journal article; Peer reviewed, 2021)Cydippid ctenophores of genus Euplokamis have been rarely reported from the north-east Atlantic in the scientific literature. The conspicuous lack of previous records is likely attributable to methodological constraints ... -
Identification and population genetic analysis of jellyfish blooms in Trondheimsfjord Role of polyps in jellyfish populations connectivity
Wihen, Aditya (Master thesis, 2021)There is a strong need to utilize jellyfish biomass in both economic and ecological way. These two aspects rely on the capability of jellyfish to bloom in large quantities and on accurate prediction on where and when ... -
LIFE HISTORY DYNAMICS OF THE SCYPHOZOAN JELLYFISH AURELIA SPP.: A COMBINED META-ANALYSIS AND MODELLING APPROACH
Barakat, Peter (Master thesis, 2020)One of the most common jellyfish genera are the cnidarian scyphozoans Aurelia spp. They are spread across most of our oceans and seas, have a complex life cycle and are a bloom forming species. Jellyfish blooms are perceived ... -
Occurrence and phenology of Aurelia aurita in the North-East Atlantic Seas
Skogstad, Line (Master thesis, 2023)Glassmaneten Aurelia aurita har en global utbredelse og er en av de mest studerte artene i klasse Scyphozoa. Likevel er maneter i høy grad oversett og forholdsvis lite studert hittil. Aurelia aurita har en kompleks ... -
Studying Behavioral Responses to Bioluminescence in Zooplankton
Five, Taran (Master thesis, 2024)Endringer i det marine lysklimaet kan ha betydelige konsekvenser for biodiversitet og samspillet mellom marine organismer. Denne endringen er spesielt relevant i marine miljøer der bioluminescens, biologisk produsert lys, ... -
The usability of eDNA to identify and quantify zooplankton communities
Svendsen, Thea (Master thesis, 2023)Havet vårt står midt i en trippel planetarisk krise. Klimaendringer, forurensning og tap av biologisk mangfold påvirker både habitater og de som bor der. Havovervåkingsprogrammer er viktige siden de gir data som kan bidra ... -
Tracking jellyfish swarm origins using a combined oceanographic-genetic-citizen science approach
Edelist, Dor; Knutsen, Øyvind; Ellingsen, Ingrid H.; Majaneva, Sanna; Aberle-Malzahn, Nicole; Dror, Hila; Angel, Dror L. (Peer reviewed; Journal article, 2022)Biological invasions of jellyfish may critically affect ecosystems and ecosystem services, yet their complex life cycle makes tracking their origins and dispersal vectors a challenging task. Here we combine citizen science ... -
Zooplankton and sediment fluxes in two contrasting fjords reveal Atlantification of the Arctic
Weydmann-Zwolicka, Agata; Prątnicka, Paula; Łącka, Magdalena; Majaneva, Sanna; Cottier, Finlo Robert; Berge, Jørgen (Peer reviewed; Journal article, 2021)Svalbard fjords are facing a significant increase in Atlantic water inflow, which influences all ecosystem components, thus the objective of this study was to assess how recent Atlantification impacts the functioning of ...