Lucija Knežević and Nico Fröhberg represented our group at the XVII International Estuarine Biogeochemistry Symposium (IEBS 2026), held 17–20 May 2026 at IST, Universidade de Lisboa, Portugal. Under the theme “Bridging Current Challenges and Missing Gaps in Estuarine Biogeochemistry,” the symposium brought together marine geochemists, biologists, ecologists and modellers from across the globe.
Lucija gave a talk titled “Preliminary study on tellurium redox speciation in pristine and industrially impacted estuaries,” in which she presented an adapted voltammetric method for Te redox speciation in natural estuarine waters. The work forms part of the TeTRANS project funded by the Alexander von Humboldt Foundation and lays the analytical groundwork for assessing how growing industrial use of Te is leaving a signature in estuarine environments.
Nico presented “Reactive dissolved nickel distribution in the Northwest Brazilian Continental Shelf: high versus low river discharge periods and the specific role of mangrove forests” (Krause, Fröhberg, de Carvalho, Schneider & Koschinsky). The contribution compares reactive dissolved Ni along the Amazon and Pará estuaries and the adjacent shelf between RV Meteor cruise M206 (low discharge) and M147 (high discharge), and highlights mangrove porewaters as a distinct local Ni source. The mangrove sampling was carried out under the PROBRAL project “Biogeochemical interactions in the Amazon region” (CAPES/DAAD).
The full book of abstracts is available on the conference website.
