1. Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB) Oldenburg Germany
2. Institute for Chemistry and Biology of the Marine Environment Carl von Ossietzky Universität Oldenburg Oldenburg Germany
3. Faculty of Business Administration and Economics Bielefeld University Bielefeld Germany
4. Department of Mathematics University of Latvia Raiņa bulvāris 19 Rīga LV‐1586 Latvia