Bente Edvardsen

15-year shift in protist communities and a decline of heterotrophic dinoflagellates in the Oslofjord and Skagerrak

Simon Hasselø Kline, Olli Hyvärinen, Louise Valestrand, Tom Andersen et autres

Climate change induced warming of temperate coastal waters is expected to affect the biodiversity, community structure, seasonality and production in planktonic protist communities, and benefit heterotrophic taxa. We investigated long-term changes in the plankton protist community of the Outer Oslofjord by comparing …

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Correction to: Assessment of the macroalgal genetic resources maintained in European germplasm banks

Laurie C. Hofmann, Inka Bartsch, Hendrik Pehlke, Cícero Alves-Lima et autres

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Effects of Culture History and Algal Taxonomy on Bacterial Communities in Long-maintained Filamentous Green Algae

Ethan Wood, Bente Edvardsen, Kari Skjånes, Luka Šupraha

Algal cultures are widely used to study algae-bacteria interactions, yet the relative roles of algal taxonomy, culturing environment, and historical contingency in shaping bacterial communities of long-maintained monoalgal cultures remain unclear. In a two-stage experimental design, we used 16 S rRNA metabarcoding …

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Assessment of the macroalgal genetic resources maintained in European germplasm banks

Laurie C. Hofmann, Inka Bartsch, Hendrik Pehlke, Cícero Alves-Lima et autres

Abstract Germplasm banks are important for preserving genetic diversity, yet the availability and long-term maintenance of macroalgal strains in germplasm banks is currently limited in European collections. To support future food security, restoration efforts, and biotechnological innovation, a strategy was recently developed …

de, pt, es, be, no, fr, gr, gb, ie (code pays fourni par la source)

ITS2 and 18S rRNA gene sequence-structure phylogeny of the Haptophyta (Haptista)

Louisa Ridder, Bente Edvardsen, Matthias (author) Wolf

The phylogeny of haptophytes, a diverse and ecologically significant group of microalgae, remains incompletely resolved despite extensive molecular studies. In this study, we apply a sequence-structure phylogenetic framework to the Haptophyta, utilizing ribosomal RNA (rRNA) small subunit (SSU) gene (18S; nearly complete …

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Phycosphere microbiome succession tracks algal growth dynamics during phosphorus-limited wastewater treatment

Ethan Wood, Bente Edvardsen, Kari Skjånes, Luka Šupraha

Algal-based wastewater treatment (phycoremediation) relies on microbial interactions within the algal phycosphere that are associated with algal growth and nutrient removal. However, the temporal dynamics of these communities under operational conditions remain poorly resolved. Using 16S and 18S rRNA gene metabarcoding, this …

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Structure elucidation of leadbeaterin-1, an ichthyotoxin associated with fish-killing blooms of Chrysochromulina leadbeateri in Northern Norwegian fjords

Xinhui Wang, Anita Solhaug, Bruno C. Garrido, Elizabeth Mudge et autres

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Environmental drivers shaping protist plankton seasonality in the northwestern Barents Sea

Lucie Goraguer, Miriam Marquardt, Rolf Gradinger, Doreen Kohlbach et autres

• Dinoflagellates dominate the winter protist community • Fast-growing diatoms dominate the spring bloom with high nutrients. • Diverse mixo- and heterotrophic protist community dominates during stratified summer. • Ciliates peak in warm, nutrient-poor Atlantic Waters with low sea ice and high …

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Insights into the nature of the microalgal toxins from the Chrysochromulina leadbeateri blooms in Northern Norwegian fjords

Xinhui Wang, Mathias Fon, Aaron J.C. Andersen, Anita Solhaug et autres

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High-resolution multiomics links nutrients and mixotrophy to toxicity in a harmful bloom of the haptophyte Chrysochromulina leadbeateri

Antonia Otte, Sylke Wohlrab, Franco Moritz, Constanze Müller et autres

Harmful algal blooms (HABs) of the toxigenic haptophyte Chrysochromulina are known to cause fish mortalities and collateral ecosystem damage. The ichthyotoxic mechanisms are poorly understood but likely dependent on toxigenesis by polyketide synthases (PKSs). We hypothesize that induction of PKS activity facilitates …

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Phycosphere of an algal co-culture phycoremediation system: Stability of bacterial communities in an Oedogonium-Stigeoclonium co-culture during cultivation in microbially rich wastewater

Ethan Wood, Bente Edvardsen, Kari Skjånes, Luka Šupraha

Abstract Algal-based wastewater remediation systems (phycoremediation) include phycosphere bacterial communities that influence algal growth, pollutant remediation, and downstream applications of biomass as fertilizers or bio-stimulants. This study investigated the bacterial community dynamics in a novel phycoremediation system using a co-culture of the …

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The cytotoxicity of the haptophyte Chrysochromulina leadbeateri towards the Atlantic salmon gill cell line ASG-10

Mathias Fon, An Chen, Rosalie Ghesquière, Silvio Uhlig et autres

measured by the Alamar Blue viability assay. Furthermore, lower extract concentrations increased caspase-3/7 activity, suggesting induction of apoptosis, while higher concentrations of the extract showed compromised cell membrane integrity. No intracellular reactive oxygen species (ROS) induction was observed. Exposure to C. leadbeateri …

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