Blar i NTNU Open på forfatter "Tsagaraki, Tatiana Margo"
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Bacterial community composition responds to changes in copepod abundance and alters ecosystem function in an Arctic mesocosm study
Tsagaraki, Tatiana Margo; Pree, Bernadette; Leiknes, Øystein; Larsen, Aud; Bratbak, Gunnar; Øvreås, Lise; Egge, Jorun Karin; Spanek, Roman; Paulsen, Maria Lund; Olsen, Yngvar; Vadstein, Olav; Thingstad, T. Frede (Journal article; Peer reviewed, 2018)Combining a minimum food web model with Arctic microbial community dynamics, we have suggested that top-down control by copepods can affect the food web down to bacterial consumption of organic carbon. Pursuing this ... -
Experiment design and bacterial abundance control extracellular H2O2 concentrations during four series of mesocosm experiments
Hopwood, M. J.; Sanchez, Nicolas; Polyviou, Despo; Leiknes, Øystein; Gallego-Urrea, Julian Alberto; Achterberg, Eric P.; Ardelan, Murat Van; Aristegui, Javier; Bach, Lennart T.; Besiktepe, Sengul; Heriot, Yohann; Kalantzi, Ioanna; Terblylk Kurt, Tuba; Santi, Ioulia; Tsagaraki, Tatiana Margo; Turner, David (Peer reviewed; Journal article, 2020)The extracellular concentration of H2O2 in surface aquatic environments is controlled by a balance between photochemical production and the microbial synthesis of catalase and peroxidase enzymes to remove H2O2 from solution. ... -
Fe(II) stability in coastal seawater during experiments in Patagonia, Svalbard, and Gran Canaria
Hopwood, Mark J.; Santana-González, Carolina; Gallego-Urrea, Julian Alberto; Sanchez, Nicolas; Achterberg, Eric P.; Ardelan, Murat Van; Gledhill, Martha; González-Dávila, Melchor; Hoffmann, Linn; Leiknes, Øystein; Santana-Casiano, Juana Magdalena; Tsagaraki, Tatiana Margo; Turner, David (Peer reviewed; Journal article, 2020)The speciation of dissolved iron (DFe) in the ocean is widely assumed to consist almost exclusively of Fe(III)-ligand complexes. Yet in most aqueous environments a poorly defined fraction of DFe also exists as Fe(II), the ...