She investigated in her work key nitrogen cycling microorganisms: the ammonia and nitrite oxidizers and provided novel insight into their ecology, activity and physiology. Kitzinger's approach was was strongly interdisciplinary, ranging from sea-going research to cutting-edge single cell techniques.“I am very excited about being awarded an Otto Hahn medal – a really nice surprise that gives you a lot of tailwind for future research!", says Kathi. Congratulations Kathi!