Acknowledgments
We would like to thank all the authors who contributed to this special issue, and all reviewers for their helpful comments, suggestions and improvements. We are especially grateful to Patti Butler and Bill Ghiorse for their excellent editorial support.
Funding
The Research Unit 571 “Geobiology of Organo- and Biofilms” was funded by the German Research Foundation (DFG). Additional funding was received by the Courant Research Centre “Geobiology”, Göttingen.