Born on August 12, 1950 in Lindhorst (near Schaumburg). Study of biology and microbiology, doctorate Göttingen Univ. (1980), scientific collaborator Constance Univ. and Univ. of Illinois/USA, German Habilitation in microbiology Marburg Univ. (1988), Associate Professor Munich Univ. (1990), Director and Scientific Member at the Max Planck Institute for Marine Microbiology (since 1992), Full Professor Bremen Univ. (1993).