IBIZA

Iron (Fe) is the most important trace element in the oceans. As a micronutrient, Fe is directly linked to primary production processes, acting indirectly on the regulation of atmospheric carbon dioxide concentration and thus playing a fundamental role in the regulation of the global climate system. The project IBIZA aims to explore the interaction between planktonic microbes (prokaryotes and protists) and Fe-binding organic ligands (representing > 99% of the dissolved Fe pool).  IBIZA’s innovative approach adopts a multidisciplinary methodological platform that complements classical physico-chemical measurements, with cutting-edge analytical chemistry and molecular biology methods (-omics) and onboard experiential activities. The sampling activities have been carried out in 15 stations from Terra Nova Bay to the Glomar-Challenger basin, encompassing different physical, chemical and biological features. At every stations 3 water depths have been sampled (surface, 40 m and ca. 50 m above the seafloor). At the stations corresponding to deployed moorings experiments have been set up utilizing surface seawater microbes challenged by the addition of the organic ligands verbascose and desferrioxamine B.